Image Element Dynamic CSS Primer Tutorial

Image Element Dynamic CSS Primer Tutorial

Image Element Dynamic CSS Primer Tutorial

We’re curious about something and need to start a new “proof of concept” (first draft) phase involving, at this early stage …

  • HTML img elements …
  • applied dynamic user selected CSS (with an emphasis on dropdown suggested filter property usage) … powered by …
  • browsed for or image URL defined content logic

Luckily we have precedents for all this, and this can be a good start! So please try our first draft Image Element Dynamic CSS web application you can also try below.

Tomorrow’s work will see whether our theory comes to fruition!

If this was interesting you may be interested in this too.

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Worldbank API User Supplied Indicator Name Word List Tutorial

Worldbank API User Supplied Indicator Name Word List Tutorial

Worldbank API User Supplied Indicator Name Word List Tutorial

Yesterday’s Worldbank API User Supplied Indicator Code Tutorial

  • gave the user some WorldBank API Indicator control … but because your average person would not know these codes … today we offer …
  • user entered Word List in the Indicator Name as an option … eg. Labor female

… and we started the day thinking a better way to go would be Regular Expressions either at the PHP end or the Javascript end. That confusion alone (ie. they are different in syntax) made us rethink, and with KISS (keep it simple signor) principles, we just thought, though, sometimes, despite the fact that … well, um … yes, well … it was still a better idea.


function showStuff() {
var iprts=0, isallokay=false, jprts=-1, iw=0, dsofar='|';
if (zhr != null) {
if (zhr.readyState == 4) {
if (zhr.status == 200) {
var partsare=zhr.responseText.split('>' + wordsare[0] + '<');
//alert(partsare.length);
if (wordsare.length == 1) {
for (iprts=0; iprts<partsare.length; iprts++) {
if (partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].indexOf('?view=chart') != -1 && partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].indexOf('/') != -1) {
findingsindc.push(partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].split('?view=chart')[0].split('/')[eval(-1 + partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].split('?view=chart')[0].split('/').length)]);
findingsdesc.push(wordsare[0]);
}
}
}
partsare=zhr.responseText.split(' ' + wordsare[0] + '<');
//alert(partsare.length);
if (wordsare.length == 1) {
for (iprts=0; iprts<partsare.length; iprts++) {
if (partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].indexOf('?view=chart') != -1 && partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].indexOf('/') != -1) {
findingsindc.push(partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].split('?view=chart')[0].split('/')[eval(-1 + partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)].split('?view=chart')[0].split('/').length)]);
findingsdesc.push(partsare[iprts].split('>')[eval(-1 + partsare[iprts].split('>').length)] + ' ' + wordsare[0]);
}
}
}

partsare=zhr.responseText.split('>' + wordsare[0] + ' ');
//alert(partsare.length);
if (wordsare.length == 1 || 2 == 2) {
for (iprts=1; iprts<partsare.length; iprts++) {
isallokay=true;
jprts=eval(-1 + iprts);
if (partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].indexOf('?view=chart') != -1 && partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].indexOf('/') != -1) {
if (wordsare.length != 1) {
for (iw=1; iw<wordsare.length; iw++) {
if (partsare[iprts].split('<')[0].toLowerCase().indexOf(wordsare[iw].toLowerCase()) == -1) { isallokay=false; }
}
}
if (isallokay) {
findingsindc.push(partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].split('?view=chart')[0].split('/')[eval(-1 + partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].split('?view=chart')[0].split('/').length)]);
findingsdesc.push(wordsare[0] + ' ' + partsare[iprts].split('<')[0]);
}
}
}
}

partsare=zhr.responseText.split(' ' + wordsare[0] + ' ');
//alert(partsare.length);
if (wordsare.length == 1 || 2 == 2) {
for (iprts=1; iprts<partsare.length; iprts++) {
isallokay=true;
jprts=eval(-1 + iprts);
if (partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].indexOf('?view=chart') != -1 && partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].indexOf('/') != -1) {
if (wordsare.length != 1) {
for (iw=1; iw<wordsare.length; iw++) {
if (partsare[iprts].split('<')[0].toLowerCase().indexOf(wordsare[iw].toLowerCase()) == -1) { isallokay=false; }
}
}
if (isallokay) {
findingsindc.push(partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].split('?view=chart')[0].split('/')[eval(-1 + partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)].split('?view=chart')[0].split('/').length)]);
findingsdesc.push(partsare[jprts].split('>')[eval(-1 + partsare[jprts].split('>').length)] + ' ' + wordsare[0] + ' ' + partsare[iprts].split('<')[0]);
}
}
}
}

if (findingsindc.length > 0) {
for (iprts=0; iprts<findingsindc.length; iprts++) {
//alert(findingsindc[iprts] + '#' + findingsdesc[iprts]);
if (dsofar.indexOf('|' + findingsindc[iprts] + '#' + findingsdesc[iprts] + '|') == -1) {
dsofar+=findingsindc[iprts] + '#' + findingsdesc[iprts] + '|';
donewone(findingsindc[iprts] + '#' + findingsdesc[iprts], document.getElementById('sindicator'));
}
}
}

//alert(zhr.responseText); // '/' . $indicator . '?view=chart'
}
}
}
}

function donewone(newone, thisobj) {
if (newone.indexOf('.') != -1 && newone.indexOf('#') != -1) {
if (thisobj.innerHTML.indexOf('indicator=' + newone.split('#')[0].toUpperCase()) != -1) {
thisobj.value='&indicator=' + newone.split('#')[0].toUpperCase();
} else {
descis=newone.split('#')[1];
if (descis.trim() == '') { descis=newone.split('#')[0]; }
thisobj.innerHTML=thisobj.innerHTML.replace(' id="sellastone" ', ' ') + '<option id="sellastone" value="&indicator=' + newone.split('#')[0].toUpperCase() + '&inddesc=' + encodeURIComponent(descis) + '">' + descis + '</option>';
thisobj.value='&indicator=' + newone.split('#')[0].toUpperCase() + '&inddesc=' + encodeURIComponent(descis);
}
} else if (newone.trim().split(' ')[0].split('#')[0].indexOf('.') != -1) {
if (thisobj.innerHTML.indexOf('indicator=' + newone.split('#')[0].toUpperCase()) != -1) {
thisobj.value='&indicator=' + newone.split('#')[0].toUpperCase();
} else {
descis=newone.split('#')[0];
thisobj.innerHTML=thisobj.innerHTML.replace(' id="sellastone" ', ' ') + '<option id="sellastone" value="&indicator=' + newone.split('#')[0].toUpperCase() + '&inddesc=' + encodeURIComponent(descis) + '">' + descis + '</option>';
thisobj.value='&indicator=' + newone.split('#')[0].toUpperCase() + '&inddesc=' + encodeURIComponent(descis);
}
} else if (newone.trim() != '') {
wordsare=newone.replace(/\,/g,' ').replace(/\ \ /g,' ').split(' ');
zhr = new XMLHttpRequest();
zhr.open('get', './worldbank_population_data.php?justindicators=y', true);
zhr.onreadystatechange = showStuff;
zhr.send(null);
}
}

function addselopt(noth,thisobj,thisvalue) {
var newone='', descis='';
if (thisvalue == '&indicator=#') {
newone=prompt('Please separate a WorldBank indicator code, optionally, by hash (ie. #) then Description or we can look for all the words in a word list.');
if (newone == null) { newone=''; }
donewone(newone, thisobj);
}
return noth;
}

… as reflected by worldbank_population_data.htm changed in this way, and you can try here.

The PHP helped us out, reaching out to Worldbank as reflected by worldbank_population_data.php changed in this way.


Previous relevant Worldbank API User Supplied Indicator Code Tutorial is shown below.

Worldbank API User Supplied Indicator Code Tutorial

Worldbank API User Supplied Indicator Code Tutorial

In yesterday’s Worldbank API Null Value Issue Tutorial‘s …

  • WorldBank API input XML data … is linked to via …
  • Dropdown list user selected WorldBank Indicator Code … and other user selections … so as to produce …
  • Google Chart report

But being as we are using PHP in the mix we can make more flexible that “Dropdown list user selected WorldBank Indicator Code” arrangement, adding one last dropdown list item (as reflected by worldbank_population_data.htm changed in this way, and you can try here) selectable that asks for a known WorldBank Indicator Code of interest that the user might know about from …


This useful WorldBank webpage ... thanks

… via …

<?php

if (isset($_GET['indicator'])) {
$indicator=str_replace('+',' ', urldecode($_GET['indicator']));
if ($indicator != "") {
$reportmode=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product",$indicator))))))))));
$reportmode2=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product (US$)",$indicator))))))))));
$lookforis=str_replace("IC.REG.DURS","Time required",str_replace("EN.POP.DNST","Population density",str_replace("SL.TLF.TOTL.IN","Labor force",str_replace("IS.RRS.TOTL.KM","Rail line",str_replace("SH.MED.BEDS.ZS","Hospital beds",str_replace("SP.DYN.TFRT.IN","Fertility rate",str_replace("AG.LND.AGRI.K2","Agricultural land (",str_replace("AG.LND.FRST.K2","Forest area (s",str_replace("EG.ELC.ACCS.ZS","Access to electricity (",str_replace("NY.GDP.MKTP.CD","GDP (current US",$indicator))))))))));
if (isset($_GET['inddesc'])) {
$reportmode=str_replace('+',' ', urldecode($_GET['inddesc']));
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
if ($indicator == strtoupper($reportmode)) {
$huhpg=file_get_contents('http://data.worldbank.org/indicator/');
$hggs=explode('/' . $indicator . '?view=chart', $huhpg);
if (sizeof($hggs) > 1) {
$reportmode=explode('>', explode('<', $hggs[1])[0])[1];
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
}

if (strpos($reportmode,"Forest area (s") !== false) { $recit=true; }
}
}
if (isset($_POST['indicator'])) {
$indicator=str_replace('+',' ', urldecode($_POST['indicator']));
if ($indicator != "") {
$reportmode=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product",$indicator))))))))));
$reportmode2=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product (US$)",$indicator))))))))));
$lookforis=str_replace("IC.REG.DURS","Time required",str_replace("EN.POP.DNST","Population density",str_replace("SL.TLF.TOTL.IN","Labor force",str_replace("IS.RRS.TOTL.KM","Rail line",str_replace("SH.MED.BEDS.ZS","Hospital beds",str_replace("SP.DYN.TFRT.IN","Fertility rate",str_replace("AG.LND.AGRI.K2","Agricultural land (s",str_replace("AG.LND.FRST.K2","Forest area (s",str_replace("EG.ELC.ACCS.ZS","Access to electricity (",str_replace("NY.GDP.MKTP.CD","GDP (current US",$indicator))))))))));
if (isset($_POST['inddesc'])) {
$reportmode=str_replace('+',' ', urldecode($_POST['inddesc']));
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
if ($indicator == strtoupper($reportmode)) {
$huhpg=file_get_contents('http://data.worldbank.org/indicator/');
$hggs=explode('/' . $indicator . '?view=chart', $huhpg);
if (sizeof($hggs) > 1) {
$reportmode=explode('>', explode('<', $hggs[1])[0])[1];
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
}

if (strpos($reportmode,"Forest area (s") !== false) { $recit=true; }
}
}

?>

… as reflected in worldbank_population_data.php changed in this way.


Previous relevant Worldbank API Null Value Issue Tutorial is shown below.

Worldbank API Null Value Issue Tutorial

Worldbank API Null Value Issue Tutorial

The WorldBank API channelling inhouse HTML and PHP web application we talked about with Worldbank API and Looks Nice Debugging Styles Tutorial had a reporting mechanism …

[later year] through to [earlier year] based World Bank Indicator of Interest [country starts with letter] style Google Chart Line/Area/Bar/Column Chart basis report

The crux of the data needed for this could end up with an HTML form getting you to such a report “Rail Lines (total route-km) by World Country K for Year 2018 to 2023 Column Chart” example looking like …


<form onsubmit="return preiframeviaurl();" target="myiframe" id="myform" style="display:none;" method="POST" action="//www.rjmprogramming.com.au/PHP/ColumnChart/column_chart.php">
<input type="hidden" name="title" id="title" value="Rail Lines (total route-km) by World Country K for Year 2018 to 2023">
<input type="hidden" name="onclick" id="onclick" value="y">
<input type="hidden" name="task" id="task" value="Rail Lines (total route-km)">
<input type="hidden" name="desc" id="desc" value="Rail Lines (total route-km)">
<input type="hidden" name="label" id="label" value="Year">
<input type="hidden" name="value" id="value" value="KZ Rail Lines (total route-km) ,KE ,KI ,KP ,KR ,KW ,KG ">
<!--input type='hidden' name='onclick' value='y'></input-->
<input type="hidden" name="moreopt" id="moreopt" value=" width: 522, height: 1200, chartArea: { width: "86%", height: "70%" }, legend: { position: "right" }, ">
<input type="hidden" name="extraopts" id="extraopts" value=" chartArea: { width: "67%" }, ">
<input type="hidden" name="wouldlikeyoutoseekpermission" value="y">
<input type="hidden" name="data" id="data" value=", [~2018~,424,0.0,4200,0.0,0.0,0.0,16060.8], [~2019~,424,0.0,4109.15,0.0,0.0,0.0,16060.8], [~2020~,424,0.0,4284.7,0.0,0.0,0.0,16063], [~2021~,417,0.0,4308.5,0.0,0.0,0.0,16005.6], [~2022~,0.0,0.0,0.0,0.0,0.0,0.0,0.0], [~2023~,0.0,0.0,0.0,0.0,0.0,0.0,0.0]">
<input id="mysubmit" type="submit" value="Draw Pie Chart">

Do you see all the “0.0” data points? They are all represented in the WorldBank API by incoming XML data that looks like …


<wb:value />

… to represent a value for WorldBank that has not been collected yet, or maybe never will be. Our improvement is to treat all those as …


<wb:value>0.0</wb:value>

… because we get nowhere with the Google Charts when the data arrays have differing member number lengths, and we can be more assured of keeping the array member lengths the same by introducing this “null becomes inhouse zero” system from here on. These changes (as well as emoji flag usage) are reflected in worldbank_population_data.php changed in this way, and which we can try for yourself here or below …

We also wanted to show a progress cursor up the top, as our PHP is querying the WorldBank API, thanks, for data to use in a report, reflected by worldbank_population_data.htm changed in this way.


Previous relevant Worldbank API and Looks Nice Debugging Styles Tutorial is shown below.

Worldbank API and Looks Nice Debugging Styles Tutorial

Worldbank API and Looks Nice Debugging Styles Tutorial

Back on the way to Worldbank API Comparison Year More Indicators Tutorial with the recent “makeover start” we had occasion to, with …

And yes, on that last item you may remember with Looks Nice Nearby Speech to Text Game Video Tutorial a theory we had …

navigation reversal fixes in wls_vs_php.htm (calling colour_wheel.html) needing to add new codeline to terminate Javascript activity (used for the first time that we can remember, ever, and thanks to this webpage)) to stop colour_wheel.html click navigation reversals …

… an idea that did seem to help with Safari but did not seem to fix the “navigation reversal” feelings on Google Chrome, to the extent that the word “furphy” springs to mind. So we continued for half a day, without success, on different “stop Javascript” strategies, with no success. And then we stumbled onto …


Google Chrome's View -> Developer -> Developer Tools and its Source tab (or panel)

… and a combination of surprise, investigation and programmer’s “aaaaaaaaahhhhh” ensued, for us. A lesson in blinkered thinking to …

  • limit scope of looking for problem to …

    … bad … and …

  • limit scope of looking to the timing of the problem, but on odd occasions the problem can be to do with the precursors to that problem

… and so we found …

  • the “grandparent” PHP changed PHP code of speech_supervisor.php with its live run … now works better with these tiny changes …
  • regarding that “grandparent”‘s textbox’s “onblur” event origins of the navigation (that you can see, and resulted to us tweaking to, with today’s tutorial picture, in that we had forgotten to check for non essential “onblur” event logic repeats when clicking on that right hand table cell (in the “grandparent”‘s view of the woooooorrrrrrllllldddd) … as per new …

    var lastval=''; // global variable

    … now gets used with the “grandparent”‘s (associated) textbox’s “onblur” event logic changes

    onblur="if (this.value.length > 0 && this.value != lastval) { if (1 == 1) { placeme(this.value); } else { thisresult=this.value + resultsuffix; } }"

    … and then variable lastval gets it’s new value at …

    function placeme(pwhere) {
    if (pwhere != '') {
    lastval=pwhere;
    // rest of logic
    }
    }

    … ensuring double “onblur” event logic executions are avoided

We think hard and fast debugging style methodology thinking can be a bit restrictive, when you consider the contrast between these two (perfectly acceptable in our programming wooooorrrrlllldd) approaches. Lateral thinking can help us too, perhaps to broaden the discussion, and emoliate our prejudices. And bravo the client side web browser web inspectors of this woooooooorrrrrrrlllllldddd.

Stop Press

We’ve added some additional emoji flag functionality into Looks Nice Game via …

  1. the “parent” HTML the changed wls_vs_php.htm … calling …
  2. the “child” HTML the changed colour_wheel.html

Previous relevant Worldbank API Comparison Year More Indicators Tutorial is shown below.

Worldbank API Comparison Year More Indicators Tutorial

Worldbank API Comparison Year More Indicators Tutorial

Today’s progress onto yesterday’s Worldbank API Comparison Year Google Chart Mobile Tutorial is a callback to the original reason for the work, that being a graphical way to present what is the real marvel of proceedings, the amazing breadth and depth of public data presented at The World Bank – Indicators | Data, thanks. Sometimes we tend to ignore the primary source of information, but we need to acknowledge every now and again, such “founts of information”, broken into indicators within the categories …

  • Agriculture & Rural Development
  • Aid Effectiveness
  • Climate Change
  • Economy & Growth
  • Education
  • Energy & Mining
  • Environment
  • External Debt
  • Financial Sector
  • Gender
  • Health
  • Infrastructure
  • Poverty
  • Private Sector
  • Public Sector
  • Science & Technology
  • Social Development
  • Social Protection & Labor
  • Trade
  • Urban Development

Pretty impressive! We’ve chosen a few new indicators to add to the pre-existant top two of …

  • Population
  • Gross Domestic Product
  • Access to electricity (% of population)
  • Forest Area (sq km)
  • Agricultural Land (sq km)
  • Fertility rate, total (births per woman)
  • Hospital Beds (per 1,000 people)
  • Rail Lines (total route-km)
  • Labor Force, Total
  • Population density (people per sq. km of land area)
  • Time required to start a business (days)

… “Access to electricity (% of population)” noteworthy Pie Chart wise benefitting from option part pieSliceText: “value”, … the general “theme” being the more we all find out, the better we are to tackle the worldwide discussions we all need to have regarding Earth’s big issues.

This needed changes to …


Previous relevant Worldbank API Comparison Year Google Chart Mobile Tutorial is shown below.

Worldbank API Comparison Year Google Chart Mobile Tutorial

Worldbank API Comparison Year Google Chart Mobile Tutorial

Yesterday’s Worldbank API Comparison Year Pie Chart Differences Tutorial involved Google Charts Pie Chart Difference graphics that …

  • needed work to be functional on mobile platforms, allowing for some Javascript tweaking of the options of those Google ChartPie Chart Difference options … with the …
  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way … supplying a screen width …

    var whsuffix='';
    var deviceWidth = window.orientation == 0 ? window.screen.height: window.screen.width;
    var deviceHeight = window.orientation == 0 ? window.screen.width : window.screen.height;
    var rectis=document.body.getBoundingClientRect();
    if (('' + rectis.width).replace('px','').replace(/0/g,'') != '' && ('' + rectis.height).replace('px','').replace(/0/g,'') != '') {
    deviceWidth=('' + rectis.width).replace('px','');
    deviceHeight=('' + rectis.height).replace('px','');
    }
    whsuffix='&swidth=' + ('' + eval(('' + deviceWidth).replace('px','')) * 1.0) + '&sheight=' + ('' + eval(('' + deviceHeight).replace('px','')) * 1.0);

    … via a suffix to its URL call of the …
  • “child” supervised you could call worldbank_population_data.php changed in this way
    <?php

    $widea=620;
    if (isset($_GET['swidth'])) {
    $widea=$_GET['swidth'];
    $widea/=3.0;
    } else if (isset($_POST['swidth'])) {
    $widea=$_POST['swidth'];
    $widea/=3.0;
    }
    $widea=round($widea);
    //
    // later ... in an echo " some HTML " bit ...
    //
    <input type='hidden' name='moreopt' value=' width: " . $widea . ", height: 1200, chartArea: { width: \"86%\", height: \"70%\" }, '></input>

    ?>
    … we think we’ve come up with a better compromise for all … and today we turn a lot of attention to …
  • start improving the Year “through to” Year functionality calling on …
  • Area Chart interfacing area_chart.php is the changed PHP programming source code as per changes
  • Bar Chart interfacing bar_chart.php is the changed PHP programming source code as per changes
  • Column Chart interfacing column_chart.php is the changed PHP programming source code as per changes
  • Line Chart interfacing line_chart.php is the changed PHP programming source code as per changes
  • … what we like to think of as “the statistical charts”, improving …

    1. emoji flags
    2. legend size … and in so doing, opening the door to …
    3. future parameterization of these chart options, via a “parent”‘s business logic (without having to change the Charts so much again)

    … also affecting …

  • pie_chart.php changed this way
  • pie_chart_diff.php changed this way

As you may well be familiar with, here is a live run link to try this WorldBank data reporting yourself.


Previous relevant Worldbank API Comparison Year Pie Chart Differences Tutorial is shown below.

Worldbank API Comparison Year Pie Chart Differences Tutorial

Worldbank API Comparison Year Pie Chart Differences Tutorial

When you compare two year data sets with the web application of yesterday’s Worldbank API World Country Reporting Revisit Tutorial you are likely to be accessing the Google Charts Pie Chart Differences tool using Google”smarts” to compare two data sets via three graphical components.

Those “graphical components” are each “entities” in terms of servicing any Google Charts “select” event logic. In order to still have some “select” (onclick) event logic we needed to compromise in two ways …

  • onmouseover tooltips could not be supported
  • the smaller Pie Chart slices two small to display a percentage value have not be zeroed into

… and so we become keen to help out here in two ways …

  1. try to make the legend not need clicking (and so size it to be a full list, at least for single letter executions) … thanks to this useful link, thanks, for lead to

    <form onsubmit='return preiframeviaurl();' target='myiframe' id='myform' style='display:none;' method='POST' action='" . $preudiff . $udiff . ".php'>
    <input type='hidden' name='title' id='title' value='" . $reportmode2 . " by World Country " . $startswith . " for Year " . $tbit . "'></input>
    " . $onclick . "
    <input type='hidden' name='task' id='task' value='" . $reportmode . "'></input>
    <input type='hidden' name='desc' id='desc' value='" . $reportmode . "'></input>
    <input type='hidden' name='label' id='label' value='Year'></input>
    <input type='hidden' name='value' id='value' value='" . str_replace('%2c','',str_replace('%2C','',$valuelist)) . "'></input>
    <input type='hidden' name='onclick' value='y'></input>
    <input type='hidden' name='moreopt' value=' width: 620, height: 1200, chartArea: { width: \"50%\", height: \"70%\" }, '></input>
    <input type='hidden' name='data' id='data' value='" . explode("&data=",$url)[1] . "'></input>" . "\n" . $idata2 . "\n" . "
    <input id='mysubmit' type='submit' value='Draw Pie Chart'></input>
    </form>
  2. make sure a full data list appears (along with emoji flags and population numbers) in the Javascript prompt window value part

This involved the “supervisory child” …


Previous relevant Worldbank API World Country Reporting Revisit Tutorial is shown below.

Worldbank API World Country Reporting Revisit Tutorial

Worldbank API World Country Reporting Revisit Tutorial

We’re revisiting the PHP web application of Worldbank API World Country Reporting Regex Tutorial for a few days to …

  • add some emoji flags
  • fix some event logic weaknesses, starting today with the single year Worldbank Data incarnations (thanks to World Bank API), but not finished as far as comparison years Worldbank Data incarnations
  • fix Mixed Content issues to allow for seamless SSL https: or http: URL usage

So, today, both “parent” HTML and “child” PHP changed today so that …

… overseeing Google Chart Pie Chart interfacing that changed as per pie_chart.php changed this way and pie_chart_diff.php changed this way.

Try a live run link for yourself to see where we are going with this.


Previous relevant Worldbank API World Country Reporting Regex Tutorial is shown below.

Worldbank API World Country Reporting Regex Tutorial

Worldbank API World Country Reporting Regex Tutorial

Don’t know why, but have often equated regex work in Javascript or PHP with “RegEx Rangers”, or some such other “superhero” categorization. That is because to wield RegEx principles is a bit like swinging a sword through the “butter” of coding problems. Its use can feel arcane, but using it can solve so many issues and simplify projects, it is unbelievable. Trouble I’ve always found is that I like to be presented with a RegEx “ask” as a user, but don’t think a lot of people like it. An upcoming tutorial, though, will show the wonders of a “RegEx” scenario for a text editing job we did recently … we’ll keep you posted on that.

But back to today’s “RegEx” thinking, building on top of yesterday’s Worldbank API World Country Reporting Range Tutorial. We ended up asking the user for optional “RegEx” matching criteria for name matches between the Worldbank API data’s …

  • key (or name)
  • value (numerical)

… properties, to add to the pre-existing, and still available, the “starting with” name filtering functionality we’ve had working ever since Worldbank API World Country Population Report Tutorial as shown way below.

RegEx “thinking” exists for both server and client parts of web applications, for us, consecutively with …

… and we use it with serverside PHP today, under the auspices of the preg_match function, though we most often use RegEx thinking with the Javascript replace function, as the way to make substitutions for more than one occurrence, (the one occurrence design being) a default “curiosity” (but can be useful too) about Javascript’s version of substitution. You may know this RegEx usage of the Javascript replace function as “global substitution”.

If you’re new to RegEx thinking let me outline just a few tips …

  • ^ can mean “start of”
  • $ can mean “end of”
  • . can sometimes mean “one existant character wildcard” … or sometimes it is % or ? for this in other “systems”
  • * can often mean “zero or more of preceding character wildcard”
  • [] and () bracketing rules are pretty crucial for the more esoteric usages … also study | usage

In our tutorial picture we are showing “land$” countries that would feature, if Greenland goes independent one day …

  • Greenland … “full of ice” … and …
  • Iceland … “full of green”

Again, both “parent” HTML and “child” PHP changed today so that …

… to facilitate better (optional) Country name filtering for users of the web application.


Previous relevant Worldbank API World Country Reporting Range Tutorial is shown below.

Worldbank API World Country Reporting Range Tutorial

Worldbank API World Country Reporting Range Tutorial

If you’ve been keeping up to date with the latest thread of blog postings regarding our “Worldbank API World Country Reporting Project” web application, you’ll notice that there is no mention of a Worldbank API indicators in the blog title. That is because we still have “generic” matters to consider, but that is not an imposition to the web application design today. Today, as well as …

  • the original alphabetic starting with country filter (to key below) … we’ve added, today, a …
  • value “range” filter (to value below) applied to the reporting theme’s numerical value

… and because everything reported on has a …

  • key (or name)
  • value (numerical)

… basis, we can apply today’s value “range” filter generically “across the board” (for any of the indicators “Population” and “Gross Domestic Product”, so far).

Why do we use the word “filter” here? Well, a filter limits something, and we’re limiting the maximum amount of output data reported on, by, optionally, taking what a user says about the minimum and maximum (numerical) value ranges for data reporting.

In the case of Google Charts, when there is lots of data too close together to view it definitively, it does some clever data reduction, and we have a means today, to get in under that data reduction to more esoteric reporting possibilities, as a result of our new filter, used well by the user.

Let’s show you how a cluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&justletters=y

… can become uncluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&max=40000000&justletters=y for those smaller values, by using this value “range” filter below …

So yet again, both “parent” HTML and “child” PHP changed today so that …

  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way
  • “child” supervised you could call worldbank_population_data.php changed in this way that if you examine you can see the use of PHP cookie methods for the first time here (as we usually use Javascript), specifically, reading and creating (via PHP setcookie method) HTTP Cookies as per the code …

    function rangeget($basis) {
    global $reportmode;
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    if (isset($_COOKIE[$cookie_name])) {
    return $_COOKIE[$cookie_name];
    }
    return 0.0;
    }

    function rangeset($basis, $val) {
    global $reportmode, $startswith;
    if ($startswith == "") {
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    $cookie_value = $val;
    setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/PHP/"); // 86400 = 1 day
    return $val;
    }
    return rangeget($basis);
    }

And so yet again, we would welcome you trying this web application for yourself to try out the new value range filtering functionality that we also talk about at WordPress 4.1.1’s Worldbank API World Country Reporting Range Tutorial.


Previous relevant Worldbank API World Country Gross Domestic Product Tutorial is shown below.

Worldbank API World Country Gross Domestic Product Tutorial

Worldbank API World Country Gross Domestic Product Tutorial

We’ve changed onion types today in our quest for the ultimate “onion of the 4th dimension” concept this project, that being our … oops, the goalposts have shifted … web application project “Worldbank API World Country Population Report Project” where we extend the “scope” of the “indicators” we can report on to those we presented yesterday with Worldbank API World Country Population Period Tutorial, those being the original …

… and here you may have sneaked a peek below to see that …

  • nothing codewise has been added to in terms of “pieces of code” … we thank the excellence of (the organization of the) Worldbank API for this, as the form of the GDP data is not enough different to that of the Population data to warrant us thinking that we needed to change anything other than versions … and …
  • nothing codewise has been renamed in terms of “pieces of code” … and that is us … we’re not embarrassed that a “guinea pig” for an idea gets extended into a bigger picture … so long as “Worldbank” is there in the name somewhere

This “guinea pig” method of extending a project has its advantages and disadvantages as most methods of doing things (inherently) have (their own) advantages and disadvantages. The “guinea pig” approach may suffer if things become complex later when you try to fit in another “extended” concept that is a bit of a “square hole” being forced into our “round socket” … (😄💖🔴). Conversely, if things stay simple enough, why not use methods like …

  • plugging in a programmatic “variable” where once there was a “hardcoding” … and …
  • plugging in (the equivalent of) an HTML select element “dropdown” where once there was a titular piece of text

… to keep on pushing out the “onion” types … we know you’re out there … come an’ show us the cut of your jib!

Yet again, both “parent” HTML and “child” PHP changed today for the new extended “indicator” reporting (adding GDP to pre-existing Population indicator(s)), so that …

And yet again, we would welcome you trying this web application for yourself to try out this new “layer” of functionality “positioning”.


Previous relevant Worldbank API World Country Population Period Tutorial is shown below.

Worldbank API World Country Population Period Tutorial

Worldbank API World Country Population Period Tutorial

Yesterday’s Worldbank API World Country Population Trend Tutorial started us on the topic of “trends” with data and our Google Chart Pie Chart Differences representation of Worldbank API derived data took the form of the first of …

  • snapshot (of two different snapshotted times) … but today we turn our attention to …
  • period of time (of several regular snapshotted times)

… and for the purposes of this latter “chart” reporting we like, around here, still talking in terms of Google Charts, in order of our opinion “regarding quality of reporting purpose” with regard to this Worldbank API Population data reporting …

  • Line Chart
  • Column Chart
  • Bar Chart
  • Area Chart

… all Google Chart “types” looking for the same basic form of data, the hint, in the first place, why we associate these all together with that new period of time reporting options we’ve integrated into the web application at the “parent” HTML supervisor level by, for every new option from yesterday of the form [year] compared to in that top lefthand HTML select element “dropdown”, we also add in an associated [year] through to “dropdown” option which, if selected, will present the user with the opportunity to select the type of Google Chart they’d like to see from the list of four chart types as described above.

Again, both “parent” HTML and “child” PHP changed today for that period of time concept of reporting, so that …

And again, we would welcome you trying this web application for yourself, to get this into perspective regarding perhaps, your own opinions about the pros and cons, strengths and weaknesses of the various very useful Google Chart ideas we appreciate for those reporting tasks, helping support the adage “every picture is worth a thousand words”.


Previous relevant Worldbank API World Country Population Trend Tutorial is shown below.

Worldbank API World Country Population Trend Tutorial

Worldbank API World Country Population Trend Tutorial

The “onion of the 4th dimension” way to go (after yesterday’s Worldbank API World Country Population Report Tutorial as shown below) for our latest web application project “Worldbank API World Country Population” we like is to now start thinking of a means to show “trends” in population. With this in mind there is a ready made Google Chart Pie Chart Differences to help here. With the Google Chart Pie Chart Differences we’ll supply two different years worth of data, and the cleverness of this Google Chart product is called into play to show three Pie Charts, namely …

  • original year’s Pie Chart Worldbank API data
  • “compared to” year‘s Pie Chart data
  • a Google Chart Pie Chart Differences “trend” Pie Chart showing an “inner ring” Pie Chart within an “outer ring” Pie Chart where you can get a sense of “trends” that are taking place

… that is manifested in the “parent” HTML code by changing the previous hardcoded “Year” word with an HTML select element “dropdown” element to define that optional second “compared to” year of interest.

The other new functionality today is a “share” via Email emoji (HTML a link “button”) that latches on to the user’s Email client program via Middle Word Share Tutorial‘s approach, namely …

mailto:[emailAddress]?subject=[Subject]&body=[URLtoLinkTo] type of href property (on that link). As you can imagine, it is possible to piece together a Javascript encodeURIComponent() version of [URLtoLinkTo] value via the current webpage’s document.URL

… the curious variation being that we don’t think of the “parent” HTML’s document.URL here (in blurb above), but, rather, it is more useful to consider the “child” HTML iframe element PHP’s document.URL both as an easier to code concept, and the simplifier of “length of data” GET vs POST HTML form element originated data issues. You see, if your data getting to the Pie Chart is over a certain length, it will be POSTed and you would lose the opportunity to Email this (in that mailto: email client program way), because you rely on real GET method URLs for this approach. At the “view” of the middle “child” PHP, though, it gets its calls, always, in a GET URL way, so it is, counterintuitively, the best (and simplest) place to intervene and code for this Email “share” functionality.

Both “parent” HTML and “child” PHP changed today, so that …

We would welcome you trying this web application for yourself, to get this into perspective.


Previous relevant Worldbank API World Country Population Report Tutorial is shown below.

Worldbank API World Country Population Report Tutorial

Worldbank API World Country Population Report Tutorial

In yesterday’s Worldbank API World Country Population Primer Tutorial, as shown below, we noted …

the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and today we show some practical strategies to be more clear (less cluttered) with the data, should the user, optionally, be interested, here.

In practical terms, we built a supervisory HTML “parent” you could call worldbank_population_data.html (with this new live run link) on top of yesterday’s “duck with the legs moving fast” hard working “child” HTML iframe element housed PHP worldbank_population_data.php (changed this way to accomodate this move).

If you had to break up a huge chunk of Worldbank API data related to World Countries and their Population, what would you research as an idea to do this? No doubt a lot of people would agree with how we approach it, that being …


report via a "starting with" alphabetic criteria

Makes sense? We hope so, and we’ll also ask for a Year of interest, with the caveat that we should offer the user the “absolute thinking” that would say if you are doing a report on …


Population by World Country A for year 2015

… for example, you should offer the user to show Pie Charts for the two scenarios below …

  • World Country A Populations compared to each other … or …
  • World Country A Populations compared to each other and a Non-A Population entry (which totals all non-A country populations)

We could present these functionality options in an HTML select element “dropdown”, but we think today, we’ll use a top menu of HTML a links to interface to the user of this “parent” supervisory web application we welcome you to try out for yourself.


Previous relevant Worldbank API World Country Population Primer Tutorial is shown below.

Worldbank API World Country Population Primer Tutorial

Worldbank API World Country Population Primer Tutorial

Today we’re revisiting the absolutely astonishing resource that the Worldbank API website provides. Such free public sources of data are very much appreciated in our books. Not so much in our pamphlets, but definitely in the books. Revisiting we thought, perhaps, we heard you ask … or were you passing wind? Glad you asked. Remember when we presented PHP Worldbank Growth of Merchandise Trade Tutorial, as shown below? Then, we used Google Chart Bubble Chart to present reams of information. Today, we again broach “reams” of Wordbank Population data per country to present a Google Chart Pie Chart report.

On our “first draft” of this web application project we create just the one pie chart, but we do that, along the way showing you a couple of things …

  • the “reams” of data is processed on the understanding it could be sent to an HTML iframe as a URL plonked into that iframe element’s src property (as if), or if that URL is too long then that data is plugged into the HTML form and then sent (POSTed) to that same HTML iframe (whose name is the same as the form element’s target=name) via an HTML form element whose action property is set to …

    http://www.rjmprogramming.com.au/PHP/PieChart/pie_chart.php
  • the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and so we try some strategies to help with those clutter issues above in blog postings to come.

In the meantime, why not try a live run of the underlying PHP (serverside) web application you could call worldbank_population_data.php featuring …

  • use of PHP file_get_contents() to extract …
  • JSON data is extracted and parsed to help piece together that URL to the Google Chart Pie Chart, as mentioned way above

Previous relevant PHP Worldbank Growth of Merchandise Trade Tutorial is shown below.

PHP Worldbank Growth of Merchandise Trade Tutorial

PHP Worldbank Growth of Merchandise Trade Tutorial

We’ve said it before, and (no doubt) we’ll say it again … there are great public data sources out there for you to explore.

As far as international data goes the Worldbank series of statistics is great, so, thanks.

Today we combine the Worldbank data for Growth of Merchandise Trade 2003-2013 with the wonderful Google Chart Bubble Chart to create (52 = (first letters of country name) 26 x 2 (concepts: Exports and Imports)) reporting charts of interest, we hope. Again, as with any reporting subject, it is a personal thing, whether the subject matter of a report is of interest, but you could say that about so many things in life.

So, we offer some PHP source code you could call growth_of_merchandise_trade.php and a live run link as well, the full loading of which requires patience.

Stop Press

Tomorrow we go over what was needed to change PHP code above to be more mobile friendly …

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Worldbank API User Supplied Indicator Code Tutorial

Worldbank API User Supplied Indicator Code Tutorial

Worldbank API User Supplied Indicator Code Tutorial

In yesterday’s Worldbank API Null Value Issue Tutorial‘s …

  • WorldBank API input XML data … is linked to via …
  • Dropdown list user selected WorldBank Indicator Code … and other user selections … so as to produce …
  • Google Chart report

But being as we are using PHP in the mix we can make more flexible that “Dropdown list user selected WorldBank Indicator Code” arrangement, adding one last dropdown list item (as reflected by worldbank_population_data.htm changed in this way, and you can try here) selectable that asks for a known WorldBank Indicator Code of interest that the user might know about from …


This useful WorldBank webpage ... thanks

… via …

<?php

if (isset($_GET['indicator'])) {
$indicator=str_replace('+',' ', urldecode($_GET['indicator']));
if ($indicator != "") {
$reportmode=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product",$indicator))))))))));
$reportmode2=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product (US$)",$indicator))))))))));
$lookforis=str_replace("IC.REG.DURS","Time required",str_replace("EN.POP.DNST","Population density",str_replace("SL.TLF.TOTL.IN","Labor force",str_replace("IS.RRS.TOTL.KM","Rail line",str_replace("SH.MED.BEDS.ZS","Hospital beds",str_replace("SP.DYN.TFRT.IN","Fertility rate",str_replace("AG.LND.AGRI.K2","Agricultural land (",str_replace("AG.LND.FRST.K2","Forest area (s",str_replace("EG.ELC.ACCS.ZS","Access to electricity (",str_replace("NY.GDP.MKTP.CD","GDP (current US",$indicator))))))))));
if (isset($_GET['inddesc'])) {
$reportmode=str_replace('+',' ', urldecode($_GET['inddesc']));
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
if ($indicator == strtoupper($reportmode)) {
$huhpg=file_get_contents('http://data.worldbank.org/indicator/');
$hggs=explode('/' . $indicator . '?view=chart', $huhpg);
if (sizeof($hggs) > 1) {
$reportmode=explode('>', explode('<', $hggs[1])[0])[1];
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
}

if (strpos($reportmode,"Forest area (s") !== false) { $recit=true; }
}
}
if (isset($_POST['indicator'])) {
$indicator=str_replace('+',' ', urldecode($_POST['indicator']));
if ($indicator != "") {
$reportmode=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product",$indicator))))))))));
$reportmode2=str_replace("IC.REG.DURS","Time required to start a business (days)",str_replace("EN.POP.DNST","Population density (people per sq. km of land area)",str_replace("SL.TLF.TOTL.IN","Labor Force, Total",str_replace("IS.RRS.TOTL.KM","Rail Lines (total route-km)",str_replace("SH.MED.BEDS.ZS","Hospital Beds (per 1,000 people)",str_replace("SP.DYN.TFRT.IN","Fertility rate, total (births per woman)",str_replace("AG.LND.AGRI.K2","Agricultural Land (sq km)",str_replace("AG.LND.FRST.K2","Forest Area (sq km)",str_replace("EG.ELC.ACCS.ZS","Access to electricity (% of population)",str_replace("NY.GDP.MKTP.CD","Gross Domestic Product (US$)",$indicator))))))))));
$lookforis=str_replace("IC.REG.DURS","Time required",str_replace("EN.POP.DNST","Population density",str_replace("SL.TLF.TOTL.IN","Labor force",str_replace("IS.RRS.TOTL.KM","Rail line",str_replace("SH.MED.BEDS.ZS","Hospital beds",str_replace("SP.DYN.TFRT.IN","Fertility rate",str_replace("AG.LND.AGRI.K2","Agricultural land (s",str_replace("AG.LND.FRST.K2","Forest area (s",str_replace("EG.ELC.ACCS.ZS","Access to electricity (",str_replace("NY.GDP.MKTP.CD","GDP (current US",$indicator))))))))));
if (isset($_POST['inddesc'])) {
$reportmode=str_replace('+',' ', urldecode($_POST['inddesc']));
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
if ($indicator == strtoupper($reportmode)) {
$huhpg=file_get_contents('http://data.worldbank.org/indicator/');
$hggs=explode('/' . $indicator . '?view=chart', $huhpg);
if (sizeof($hggs) > 1) {
$reportmode=explode('>', explode('<', $hggs[1])[0])[1];
$reportmode2=$reportmode;
$lookforis=trim(explode(',', explode(' (', $reportmode)[0])[0]);
}
}

if (strpos($reportmode,"Forest area (s") !== false) { $recit=true; }
}
}

?>

… as reflected in worldbank_population_data.php changed in this way.


Previous relevant Worldbank API Null Value Issue Tutorial is shown below.

Worldbank API Null Value Issue Tutorial

Worldbank API Null Value Issue Tutorial

The WorldBank API channelling inhouse HTML and PHP web application we talked about with Worldbank API and Looks Nice Debugging Styles Tutorial had a reporting mechanism …

[later year] through to [earlier year] based World Bank Indicator of Interest [country starts with letter] style Google Chart Line/Area/Bar/Column Chart basis report

The crux of the data needed for this could end up with an HTML form getting you to such a report “Rail Lines (total route-km) by World Country K for Year 2018 to 2023 Column Chart” example looking like …


<form onsubmit="return preiframeviaurl();" target="myiframe" id="myform" style="display:none;" method="POST" action="//www.rjmprogramming.com.au/PHP/ColumnChart/column_chart.php">
<input type="hidden" name="title" id="title" value="Rail Lines (total route-km) by World Country K for Year 2018 to 2023">
<input type="hidden" name="onclick" id="onclick" value="y">
<input type="hidden" name="task" id="task" value="Rail Lines (total route-km)">
<input type="hidden" name="desc" id="desc" value="Rail Lines (total route-km)">
<input type="hidden" name="label" id="label" value="Year">
<input type="hidden" name="value" id="value" value="KZ Rail Lines (total route-km) ,KE ,KI ,KP ,KR ,KW ,KG ">
<!--input type='hidden' name='onclick' value='y'></input-->
<input type="hidden" name="moreopt" id="moreopt" value=" width: 522, height: 1200, chartArea: { width: "86%", height: "70%" }, legend: { position: "right" }, ">
<input type="hidden" name="extraopts" id="extraopts" value=" chartArea: { width: "67%" }, ">
<input type="hidden" name="wouldlikeyoutoseekpermission" value="y">
<input type="hidden" name="data" id="data" value=", [~2018~,424,0.0,4200,0.0,0.0,0.0,16060.8], [~2019~,424,0.0,4109.15,0.0,0.0,0.0,16060.8], [~2020~,424,0.0,4284.7,0.0,0.0,0.0,16063], [~2021~,417,0.0,4308.5,0.0,0.0,0.0,16005.6], [~2022~,0.0,0.0,0.0,0.0,0.0,0.0,0.0], [~2023~,0.0,0.0,0.0,0.0,0.0,0.0,0.0]">
<input id="mysubmit" type="submit" value="Draw Pie Chart">

Do you see all the “0.0” data points? They are all represented in the WorldBank API by incoming XML data that looks like …


<wb:value />

… to represent a value for WorldBank that has not been collected yet, or maybe never will be. Our improvement is to treat all those as …


<wb:value>0.0</wb:value>

… because we get nowhere with the Google Charts when the data arrays have differing member number lengths, and we can be more assured of keeping the array member lengths the same by introducing this “null becomes inhouse zero” system from here on. These changes (as well as emoji flag usage) are reflected in worldbank_population_data.php changed in this way, and which we can try for yourself here or below …

We also wanted to show a progress cursor up the top, as our PHP is querying the WorldBank API, thanks, for data to use in a report, reflected by worldbank_population_data.htm changed in this way.


Previous relevant Worldbank API and Looks Nice Debugging Styles Tutorial is shown below.

Worldbank API and Looks Nice Debugging Styles Tutorial

Worldbank API and Looks Nice Debugging Styles Tutorial

Back on the way to Worldbank API Comparison Year More Indicators Tutorial with the recent “makeover start” we had occasion to, with …

And yes, on that last item you may remember with Looks Nice Nearby Speech to Text Game Video Tutorial a theory we had …

navigation reversal fixes in wls_vs_php.htm (calling colour_wheel.html) needing to add new codeline to terminate Javascript activity (used for the first time that we can remember, ever, and thanks to this webpage)) to stop colour_wheel.html click navigation reversals …

… an idea that did seem to help with Safari but did not seem to fix the “navigation reversal” feelings on Google Chrome, to the extent that the word “furphy” springs to mind. So we continued for half a day, without success, on different “stop Javascript” strategies, with no success. And then we stumbled onto …


Google Chrome's View -> Developer -> Developer Tools and its Source tab (or panel)

… and a combination of surprise, investigation and programmer’s “aaaaaaaaahhhhh” ensued, for us. A lesson in blinkered thinking to …

  • limit scope of looking for problem to …

    … bad … and …

  • limit scope of looking to the timing of the problem, but on odd occasions the problem can be to do with the precursors to that problem

… and so we found …

  • the “grandparent” PHP changed PHP code of speech_supervisor.php with its live run … now works better with these tiny changes …
  • regarding that “grandparent”‘s textbox’s “onblur” event origins of the navigation (that you can see, and resulted to us tweaking to, with today’s tutorial picture, in that we had forgotten to check for non essential “onblur” event logic repeats when clicking on that right hand table cell (in the “grandparent”‘s view of the woooooorrrrrrllllldddd) … as per new …

    var lastval=''; // global variable

    … now gets used with the “grandparent”‘s (associated) textbox’s “onblur” event logic changes

    onblur="if (this.value.length > 0 && this.value != lastval) { if (1 == 1) { placeme(this.value); } else { thisresult=this.value + resultsuffix; } }"

    … and then variable lastval gets it’s new value at …

    function placeme(pwhere) {
    if (pwhere != '') {
    lastval=pwhere;
    // rest of logic
    }
    }

    … ensuring double “onblur” event logic executions are avoided

We think hard and fast debugging style methodology thinking can be a bit restrictive, when you consider the contrast between these two (perfectly acceptable in our programming wooooorrrrlllldd) approaches. Lateral thinking can help us too, perhaps to broaden the discussion, and emoliate our prejudices. And bravo the client side web browser web inspectors of this woooooooorrrrrrrlllllldddd.

Stop Press

We’ve added some additional emoji flag functionality into Looks Nice Game via …

  1. the “parent” HTML the changed wls_vs_php.htm … calling …
  2. the “child” HTML the changed colour_wheel.html

Previous relevant Worldbank API Comparison Year More Indicators Tutorial is shown below.

Worldbank API Comparison Year More Indicators Tutorial

Worldbank API Comparison Year More Indicators Tutorial

Today’s progress onto yesterday’s Worldbank API Comparison Year Google Chart Mobile Tutorial is a callback to the original reason for the work, that being a graphical way to present what is the real marvel of proceedings, the amazing breadth and depth of public data presented at The World Bank – Indicators | Data, thanks. Sometimes we tend to ignore the primary source of information, but we need to acknowledge every now and again, such “founts of information”, broken into indicators within the categories …

  • Agriculture & Rural Development
  • Aid Effectiveness
  • Climate Change
  • Economy & Growth
  • Education
  • Energy & Mining
  • Environment
  • External Debt
  • Financial Sector
  • Gender
  • Health
  • Infrastructure
  • Poverty
  • Private Sector
  • Public Sector
  • Science & Technology
  • Social Development
  • Social Protection & Labor
  • Trade
  • Urban Development

Pretty impressive! We’ve chosen a few new indicators to add to the pre-existant top two of …

  • Population
  • Gross Domestic Product
  • Access to electricity (% of population)
  • Forest Area (sq km)
  • Agricultural Land (sq km)
  • Fertility rate, total (births per woman)
  • Hospital Beds (per 1,000 people)
  • Rail Lines (total route-km)
  • Labor Force, Total
  • Population density (people per sq. km of land area)
  • Time required to start a business (days)

… “Access to electricity (% of population)” noteworthy Pie Chart wise benefitting from option part pieSliceText: “value”, … the general “theme” being the more we all find out, the better we are to tackle the worldwide discussions we all need to have regarding Earth’s big issues.

This needed changes to …


Previous relevant Worldbank API Comparison Year Google Chart Mobile Tutorial is shown below.

Worldbank API Comparison Year Google Chart Mobile Tutorial

Worldbank API Comparison Year Google Chart Mobile Tutorial

Yesterday’s Worldbank API Comparison Year Pie Chart Differences Tutorial involved Google Charts Pie Chart Difference graphics that …

  • needed work to be functional on mobile platforms, allowing for some Javascript tweaking of the options of those Google ChartPie Chart Difference options … with the …
  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way … supplying a screen width …

    var whsuffix='';
    var deviceWidth = window.orientation == 0 ? window.screen.height: window.screen.width;
    var deviceHeight = window.orientation == 0 ? window.screen.width : window.screen.height;
    var rectis=document.body.getBoundingClientRect();
    if (('' + rectis.width).replace('px','').replace(/0/g,'') != '' && ('' + rectis.height).replace('px','').replace(/0/g,'') != '') {
    deviceWidth=('' + rectis.width).replace('px','');
    deviceHeight=('' + rectis.height).replace('px','');
    }
    whsuffix='&swidth=' + ('' + eval(('' + deviceWidth).replace('px','')) * 1.0) + '&sheight=' + ('' + eval(('' + deviceHeight).replace('px','')) * 1.0);

    … via a suffix to its URL call of the …
  • “child” supervised you could call worldbank_population_data.php changed in this way
    <?php

    $widea=620;
    if (isset($_GET['swidth'])) {
    $widea=$_GET['swidth'];
    $widea/=3.0;
    } else if (isset($_POST['swidth'])) {
    $widea=$_POST['swidth'];
    $widea/=3.0;
    }
    $widea=round($widea);
    //
    // later ... in an echo " some HTML " bit ...
    //
    <input type='hidden' name='moreopt' value=' width: " . $widea . ", height: 1200, chartArea: { width: \"86%\", height: \"70%\" }, '></input>

    ?>
    … we think we’ve come up with a better compromise for all … and today we turn a lot of attention to …
  • start improving the Year “through to” Year functionality calling on …
  • Area Chart interfacing area_chart.php is the changed PHP programming source code as per changes
  • Bar Chart interfacing bar_chart.php is the changed PHP programming source code as per changes
  • Column Chart interfacing column_chart.php is the changed PHP programming source code as per changes
  • Line Chart interfacing line_chart.php is the changed PHP programming source code as per changes
  • … what we like to think of as “the statistical charts”, improving …

    1. emoji flags
    2. legend size … and in so doing, opening the door to …
    3. future parameterization of these chart options, via a “parent”‘s business logic (without having to change the Charts so much again)

    … also affecting …

  • pie_chart.php changed this way
  • pie_chart_diff.php changed this way

As you may well be familiar with, here is a live run link to try this WorldBank data reporting yourself.


Previous relevant Worldbank API Comparison Year Pie Chart Differences Tutorial is shown below.

Worldbank API Comparison Year Pie Chart Differences Tutorial

Worldbank API Comparison Year Pie Chart Differences Tutorial

When you compare two year data sets with the web application of yesterday’s Worldbank API World Country Reporting Revisit Tutorial you are likely to be accessing the Google Charts Pie Chart Differences tool using Google”smarts” to compare two data sets via three graphical components.

Those “graphical components” are each “entities” in terms of servicing any Google Charts “select” event logic. In order to still have some “select” (onclick) event logic we needed to compromise in two ways …

  • onmouseover tooltips could not be supported
  • the smaller Pie Chart slices two small to display a percentage value have not be zeroed into

… and so we become keen to help out here in two ways …

  1. try to make the legend not need clicking (and so size it to be a full list, at least for single letter executions) … thanks to this useful link, thanks, for lead to

    <form onsubmit='return preiframeviaurl();' target='myiframe' id='myform' style='display:none;' method='POST' action='" . $preudiff . $udiff . ".php'>
    <input type='hidden' name='title' id='title' value='" . $reportmode2 . " by World Country " . $startswith . " for Year " . $tbit . "'></input>
    " . $onclick . "
    <input type='hidden' name='task' id='task' value='" . $reportmode . "'></input>
    <input type='hidden' name='desc' id='desc' value='" . $reportmode . "'></input>
    <input type='hidden' name='label' id='label' value='Year'></input>
    <input type='hidden' name='value' id='value' value='" . str_replace('%2c','',str_replace('%2C','',$valuelist)) . "'></input>
    <input type='hidden' name='onclick' value='y'></input>
    <input type='hidden' name='moreopt' value=' width: 620, height: 1200, chartArea: { width: \"50%\", height: \"70%\" }, '></input>
    <input type='hidden' name='data' id='data' value='" . explode("&data=",$url)[1] . "'></input>" . "\n" . $idata2 . "\n" . "
    <input id='mysubmit' type='submit' value='Draw Pie Chart'></input>
    </form>
  2. make sure a full data list appears (along with emoji flags and population numbers) in the Javascript prompt window value part

This involved the “supervisory child” …


Previous relevant Worldbank API World Country Reporting Revisit Tutorial is shown below.

Worldbank API World Country Reporting Revisit Tutorial

Worldbank API World Country Reporting Revisit Tutorial

We’re revisiting the PHP web application of Worldbank API World Country Reporting Regex Tutorial for a few days to …

  • add some emoji flags
  • fix some event logic weaknesses, starting today with the single year Worldbank Data incarnations (thanks to World Bank API), but not finished as far as comparison years Worldbank Data incarnations
  • fix Mixed Content issues to allow for seamless SSL https: or http: URL usage

So, today, both “parent” HTML and “child” PHP changed today so that …

… overseeing Google Chart Pie Chart interfacing that changed as per pie_chart.php changed this way and pie_chart_diff.php changed this way.

Try a live run link for yourself to see where we are going with this.


Previous relevant Worldbank API World Country Reporting Regex Tutorial is shown below.

Worldbank API World Country Reporting Regex Tutorial

Worldbank API World Country Reporting Regex Tutorial

Don’t know why, but have often equated regex work in Javascript or PHP with “RegEx Rangers”, or some such other “superhero” categorization. That is because to wield RegEx principles is a bit like swinging a sword through the “butter” of coding problems. Its use can feel arcane, but using it can solve so many issues and simplify projects, it is unbelievable. Trouble I’ve always found is that I like to be presented with a RegEx “ask” as a user, but don’t think a lot of people like it. An upcoming tutorial, though, will show the wonders of a “RegEx” scenario for a text editing job we did recently … we’ll keep you posted on that.

But back to today’s “RegEx” thinking, building on top of yesterday’s Worldbank API World Country Reporting Range Tutorial. We ended up asking the user for optional “RegEx” matching criteria for name matches between the Worldbank API data’s …

  • key (or name)
  • value (numerical)

… properties, to add to the pre-existing, and still available, the “starting with” name filtering functionality we’ve had working ever since Worldbank API World Country Population Report Tutorial as shown way below.

RegEx “thinking” exists for both server and client parts of web applications, for us, consecutively with …

… and we use it with serverside PHP today, under the auspices of the preg_match function, though we most often use RegEx thinking with the Javascript replace function, as the way to make substitutions for more than one occurrence, (the one occurrence design being) a default “curiosity” (but can be useful too) about Javascript’s version of substitution. You may know this RegEx usage of the Javascript replace function as “global substitution”.

If you’re new to RegEx thinking let me outline just a few tips …

  • ^ can mean “start of”
  • $ can mean “end of”
  • . can sometimes mean “one existant character wildcard” … or sometimes it is % or ? for this in other “systems”
  • * can often mean “zero or more of preceding character wildcard”
  • [] and () bracketing rules are pretty crucial for the more esoteric usages … also study | usage

In our tutorial picture we are showing “land$” countries that would feature, if Greenland goes independent one day …

  • Greenland … “full of ice” … and …
  • Iceland … “full of green”

Again, both “parent” HTML and “child” PHP changed today so that …

… to facilitate better (optional) Country name filtering for users of the web application.


Previous relevant Worldbank API World Country Reporting Range Tutorial is shown below.

Worldbank API World Country Reporting Range Tutorial

Worldbank API World Country Reporting Range Tutorial

If you’ve been keeping up to date with the latest thread of blog postings regarding our “Worldbank API World Country Reporting Project” web application, you’ll notice that there is no mention of a Worldbank API indicators in the blog title. That is because we still have “generic” matters to consider, but that is not an imposition to the web application design today. Today, as well as …

  • the original alphabetic starting with country filter (to key below) … we’ve added, today, a …
  • value “range” filter (to value below) applied to the reporting theme’s numerical value

… and because everything reported on has a …

  • key (or name)
  • value (numerical)

… basis, we can apply today’s value “range” filter generically “across the board” (for any of the indicators “Population” and “Gross Domestic Product”, so far).

Why do we use the word “filter” here? Well, a filter limits something, and we’re limiting the maximum amount of output data reported on, by, optionally, taking what a user says about the minimum and maximum (numerical) value ranges for data reporting.

In the case of Google Charts, when there is lots of data too close together to view it definitively, it does some clever data reduction, and we have a means today, to get in under that data reduction to more esoteric reporting possibilities, as a result of our new filter, used well by the user.

Let’s show you how a cluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&justletters=y

… can become uncluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&max=40000000&justletters=y for those smaller values, by using this value “range” filter below …

So yet again, both “parent” HTML and “child” PHP changed today so that …

  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way
  • “child” supervised you could call worldbank_population_data.php changed in this way that if you examine you can see the use of PHP cookie methods for the first time here (as we usually use Javascript), specifically, reading and creating (via PHP setcookie method) HTTP Cookies as per the code …

    function rangeget($basis) {
    global $reportmode;
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    if (isset($_COOKIE[$cookie_name])) {
    return $_COOKIE[$cookie_name];
    }
    return 0.0;
    }

    function rangeset($basis, $val) {
    global $reportmode, $startswith;
    if ($startswith == "") {
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    $cookie_value = $val;
    setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/PHP/"); // 86400 = 1 day
    return $val;
    }
    return rangeget($basis);
    }

And so yet again, we would welcome you trying this web application for yourself to try out the new value range filtering functionality that we also talk about at WordPress 4.1.1’s Worldbank API World Country Reporting Range Tutorial.


Previous relevant Worldbank API World Country Gross Domestic Product Tutorial is shown below.

Worldbank API World Country Gross Domestic Product Tutorial

Worldbank API World Country Gross Domestic Product Tutorial

We’ve changed onion types today in our quest for the ultimate “onion of the 4th dimension” concept this project, that being our … oops, the goalposts have shifted … web application project “Worldbank API World Country Population Report Project” where we extend the “scope” of the “indicators” we can report on to those we presented yesterday with Worldbank API World Country Population Period Tutorial, those being the original …

… and here you may have sneaked a peek below to see that …

  • nothing codewise has been added to in terms of “pieces of code” … we thank the excellence of (the organization of the) Worldbank API for this, as the form of the GDP data is not enough different to that of the Population data to warrant us thinking that we needed to change anything other than versions … and …
  • nothing codewise has been renamed in terms of “pieces of code” … and that is us … we’re not embarrassed that a “guinea pig” for an idea gets extended into a bigger picture … so long as “Worldbank” is there in the name somewhere

This “guinea pig” method of extending a project has its advantages and disadvantages as most methods of doing things (inherently) have (their own) advantages and disadvantages. The “guinea pig” approach may suffer if things become complex later when you try to fit in another “extended” concept that is a bit of a “square hole” being forced into our “round socket” … (😄💖🔴). Conversely, if things stay simple enough, why not use methods like …

  • plugging in a programmatic “variable” where once there was a “hardcoding” … and …
  • plugging in (the equivalent of) an HTML select element “dropdown” where once there was a titular piece of text

… to keep on pushing out the “onion” types … we know you’re out there … come an’ show us the cut of your jib!

Yet again, both “parent” HTML and “child” PHP changed today for the new extended “indicator” reporting (adding GDP to pre-existing Population indicator(s)), so that …

And yet again, we would welcome you trying this web application for yourself to try out this new “layer” of functionality “positioning”.


Previous relevant Worldbank API World Country Population Period Tutorial is shown below.

Worldbank API World Country Population Period Tutorial

Worldbank API World Country Population Period Tutorial

Yesterday’s Worldbank API World Country Population Trend Tutorial started us on the topic of “trends” with data and our Google Chart Pie Chart Differences representation of Worldbank API derived data took the form of the first of …

  • snapshot (of two different snapshotted times) … but today we turn our attention to …
  • period of time (of several regular snapshotted times)

… and for the purposes of this latter “chart” reporting we like, around here, still talking in terms of Google Charts, in order of our opinion “regarding quality of reporting purpose” with regard to this Worldbank API Population data reporting …

  • Line Chart
  • Column Chart
  • Bar Chart
  • Area Chart

… all Google Chart “types” looking for the same basic form of data, the hint, in the first place, why we associate these all together with that new period of time reporting options we’ve integrated into the web application at the “parent” HTML supervisor level by, for every new option from yesterday of the form [year] compared to in that top lefthand HTML select element “dropdown”, we also add in an associated [year] through to “dropdown” option which, if selected, will present the user with the opportunity to select the type of Google Chart they’d like to see from the list of four chart types as described above.

Again, both “parent” HTML and “child” PHP changed today for that period of time concept of reporting, so that …

And again, we would welcome you trying this web application for yourself, to get this into perspective regarding perhaps, your own opinions about the pros and cons, strengths and weaknesses of the various very useful Google Chart ideas we appreciate for those reporting tasks, helping support the adage “every picture is worth a thousand words”.


Previous relevant Worldbank API World Country Population Trend Tutorial is shown below.

Worldbank API World Country Population Trend Tutorial

Worldbank API World Country Population Trend Tutorial

The “onion of the 4th dimension” way to go (after yesterday’s Worldbank API World Country Population Report Tutorial as shown below) for our latest web application project “Worldbank API World Country Population” we like is to now start thinking of a means to show “trends” in population. With this in mind there is a ready made Google Chart Pie Chart Differences to help here. With the Google Chart Pie Chart Differences we’ll supply two different years worth of data, and the cleverness of this Google Chart product is called into play to show three Pie Charts, namely …

  • original year’s Pie Chart Worldbank API data
  • “compared to” year‘s Pie Chart data
  • a Google Chart Pie Chart Differences “trend” Pie Chart showing an “inner ring” Pie Chart within an “outer ring” Pie Chart where you can get a sense of “trends” that are taking place

… that is manifested in the “parent” HTML code by changing the previous hardcoded “Year” word with an HTML select element “dropdown” element to define that optional second “compared to” year of interest.

The other new functionality today is a “share” via Email emoji (HTML a link “button”) that latches on to the user’s Email client program via Middle Word Share Tutorial‘s approach, namely …

mailto:[emailAddress]?subject=[Subject]&body=[URLtoLinkTo] type of href property (on that link). As you can imagine, it is possible to piece together a Javascript encodeURIComponent() version of [URLtoLinkTo] value via the current webpage’s document.URL

… the curious variation being that we don’t think of the “parent” HTML’s document.URL here (in blurb above), but, rather, it is more useful to consider the “child” HTML iframe element PHP’s document.URL both as an easier to code concept, and the simplifier of “length of data” GET vs POST HTML form element originated data issues. You see, if your data getting to the Pie Chart is over a certain length, it will be POSTed and you would lose the opportunity to Email this (in that mailto: email client program way), because you rely on real GET method URLs for this approach. At the “view” of the middle “child” PHP, though, it gets its calls, always, in a GET URL way, so it is, counterintuitively, the best (and simplest) place to intervene and code for this Email “share” functionality.

Both “parent” HTML and “child” PHP changed today, so that …

We would welcome you trying this web application for yourself, to get this into perspective.


Previous relevant Worldbank API World Country Population Report Tutorial is shown below.

Worldbank API World Country Population Report Tutorial

Worldbank API World Country Population Report Tutorial

In yesterday’s Worldbank API World Country Population Primer Tutorial, as shown below, we noted …

the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and today we show some practical strategies to be more clear (less cluttered) with the data, should the user, optionally, be interested, here.

In practical terms, we built a supervisory HTML “parent” you could call worldbank_population_data.html (with this new live run link) on top of yesterday’s “duck with the legs moving fast” hard working “child” HTML iframe element housed PHP worldbank_population_data.php (changed this way to accomodate this move).

If you had to break up a huge chunk of Worldbank API data related to World Countries and their Population, what would you research as an idea to do this? No doubt a lot of people would agree with how we approach it, that being …


report via a "starting with" alphabetic criteria

Makes sense? We hope so, and we’ll also ask for a Year of interest, with the caveat that we should offer the user the “absolute thinking” that would say if you are doing a report on …


Population by World Country A for year 2015

… for example, you should offer the user to show Pie Charts for the two scenarios below …

  • World Country A Populations compared to each other … or …
  • World Country A Populations compared to each other and a Non-A Population entry (which totals all non-A country populations)

We could present these functionality options in an HTML select element “dropdown”, but we think today, we’ll use a top menu of HTML a links to interface to the user of this “parent” supervisory web application we welcome you to try out for yourself.


Previous relevant Worldbank API World Country Population Primer Tutorial is shown below.

Worldbank API World Country Population Primer Tutorial

Worldbank API World Country Population Primer Tutorial

Today we’re revisiting the absolutely astonishing resource that the Worldbank API website provides. Such free public sources of data are very much appreciated in our books. Not so much in our pamphlets, but definitely in the books. Revisiting we thought, perhaps, we heard you ask … or were you passing wind? Glad you asked. Remember when we presented PHP Worldbank Growth of Merchandise Trade Tutorial, as shown below? Then, we used Google Chart Bubble Chart to present reams of information. Today, we again broach “reams” of Wordbank Population data per country to present a Google Chart Pie Chart report.

On our “first draft” of this web application project we create just the one pie chart, but we do that, along the way showing you a couple of things …

  • the “reams” of data is processed on the understanding it could be sent to an HTML iframe as a URL plonked into that iframe element’s src property (as if), or if that URL is too long then that data is plugged into the HTML form and then sent (POSTed) to that same HTML iframe (whose name is the same as the form element’s target=name) via an HTML form element whose action property is set to …

    http://www.rjmprogramming.com.au/PHP/PieChart/pie_chart.php
  • the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and so we try some strategies to help with those clutter issues above in blog postings to come.

In the meantime, why not try a live run of the underlying PHP (serverside) web application you could call worldbank_population_data.php featuring …

  • use of PHP file_get_contents() to extract …
  • JSON data is extracted and parsed to help piece together that URL to the Google Chart Pie Chart, as mentioned way above

Previous relevant PHP Worldbank Growth of Merchandise Trade Tutorial is shown below.

PHP Worldbank Growth of Merchandise Trade Tutorial

PHP Worldbank Growth of Merchandise Trade Tutorial

We’ve said it before, and (no doubt) we’ll say it again … there are great public data sources out there for you to explore.

As far as international data goes the Worldbank series of statistics is great, so, thanks.

Today we combine the Worldbank data for Growth of Merchandise Trade 2003-2013 with the wonderful Google Chart Bubble Chart to create (52 = (first letters of country name) 26 x 2 (concepts: Exports and Imports)) reporting charts of interest, we hope. Again, as with any reporting subject, it is a personal thing, whether the subject matter of a report is of interest, but you could say that about so many things in life.

So, we offer some PHP source code you could call growth_of_merchandise_trade.php and a live run link as well, the full loading of which requires patience.

Stop Press

Tomorrow we go over what was needed to change PHP code above to be more mobile friendly …

If this was interesting you may be interested in this too.


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Worldbank API Null Value Issue Tutorial

Worldbank API Null Value Issue Tutorial

Worldbank API Null Value Issue Tutorial

The WorldBank API channelling inhouse HTML and PHP web application we talked about with Worldbank API and Looks Nice Debugging Styles Tutorial had a reporting mechanism …

[later year] through to [earlier year] based World Bank Indicator of Interest [country starts with letter] style Google Chart Line/Area/Bar/Column Chart basis report

The crux of the data needed for this could end up with an HTML form getting you to such a report “Rail Lines (total route-km) by World Country K for Year 2018 to 2023 Column Chart” example looking like …


<form onsubmit="return preiframeviaurl();" target="myiframe" id="myform" style="display:none;" method="POST" action="//www.rjmprogramming.com.au/PHP/ColumnChart/column_chart.php">
<input type="hidden" name="title" id="title" value="Rail Lines (total route-km) by World Country K for Year 2018 to 2023">
<input type="hidden" name="onclick" id="onclick" value="y">
<input type="hidden" name="task" id="task" value="Rail Lines (total route-km)">
<input type="hidden" name="desc" id="desc" value="Rail Lines (total route-km)">
<input type="hidden" name="label" id="label" value="Year">
<input type="hidden" name="value" id="value" value="KZ Rail Lines (total route-km) ,KE ,KI ,KP ,KR ,KW ,KG ">
<!--input type='hidden' name='onclick' value='y'></input-->
<input type="hidden" name="moreopt" id="moreopt" value=" width: 522, height: 1200, chartArea: { width: "86%", height: "70%" }, legend: { position: "right" }, ">
<input type="hidden" name="extraopts" id="extraopts" value=" chartArea: { width: "67%" }, ">
<input type="hidden" name="wouldlikeyoutoseekpermission" value="y">
<input type="hidden" name="data" id="data" value=", [~2018~,424,0.0,4200,0.0,0.0,0.0,16060.8], [~2019~,424,0.0,4109.15,0.0,0.0,0.0,16060.8], [~2020~,424,0.0,4284.7,0.0,0.0,0.0,16063], [~2021~,417,0.0,4308.5,0.0,0.0,0.0,16005.6], [~2022~,0.0,0.0,0.0,0.0,0.0,0.0,0.0], [~2023~,0.0,0.0,0.0,0.0,0.0,0.0,0.0]">
<input id="mysubmit" type="submit" value="Draw Pie Chart">

Do you see all the “0.0” data points? They are all represented in the WorldBank API by incoming XML data that looks like …


<wb:value />

… to represent a value for WorldBank that has not been collected yet, or maybe never will be. Our improvement is to treat all those as …


<wb:value>0.0</wb:value>

… because we get nowhere with the Google Charts when the data arrays have differing member number lengths, and we can be more assured of keeping the array member lengths the same by introducing this “null becomes inhouse zero” system from here on. These changes (as well as emoji flag usage) are reflected in worldbank_population_data.php changed in this way, and which we can try for yourself here or below …

We also wanted to show a progress cursor up the top, as our PHP is querying the WorldBank API, thanks, for data to use in a report, reflected by worldbank_population_data.htm changed in this way.


Previous relevant Worldbank API and Looks Nice Debugging Styles Tutorial is shown below.

Worldbank API and Looks Nice Debugging Styles Tutorial

Worldbank API and Looks Nice Debugging Styles Tutorial

Back on the way to Worldbank API Comparison Year More Indicators Tutorial with the recent “makeover start” we had occasion to, with …

And yes, on that last item you may remember with Looks Nice Nearby Speech to Text Game Video Tutorial a theory we had …

navigation reversal fixes in wls_vs_php.htm (calling colour_wheel.html) needing to add new codeline to terminate Javascript activity (used for the first time that we can remember, ever, and thanks to this webpage)) to stop colour_wheel.html click navigation reversals …

… an idea that did seem to help with Safari but did not seem to fix the “navigation reversal” feelings on Google Chrome, to the extent that the word “furphy” springs to mind. So we continued for half a day, without success, on different “stop Javascript” strategies, with no success. And then we stumbled onto …


Google Chrome's View -> Developer -> Developer Tools and its Source tab (or panel)

… and a combination of surprise, investigation and programmer’s “aaaaaaaaahhhhh” ensued, for us. A lesson in blinkered thinking to …

  • limit scope of looking for problem to …

    … bad … and …

  • limit scope of looking to the timing of the problem, but on odd occasions the problem can be to do with the precursors to that problem

… and so we found …

  • the “grandparent” PHP changed PHP code of speech_supervisor.php with its live run … now works better with these tiny changes …
  • regarding that “grandparent”‘s textbox’s “onblur” event origins of the navigation (that you can see, and resulted to us tweaking to, with today’s tutorial picture, in that we had forgotten to check for non essential “onblur” event logic repeats when clicking on that right hand table cell (in the “grandparent”‘s view of the woooooorrrrrrllllldddd) … as per new …

    var lastval=''; // global variable

    … now gets used with the “grandparent”‘s (associated) textbox’s “onblur” event logic changes

    onblur="if (this.value.length > 0 && this.value != lastval) { if (1 == 1) { placeme(this.value); } else { thisresult=this.value + resultsuffix; } }"

    … and then variable lastval gets it’s new value at …

    function placeme(pwhere) {
    if (pwhere != '') {
    lastval=pwhere;
    // rest of logic
    }
    }

    … ensuring double “onblur” event logic executions are avoided

We think hard and fast debugging style methodology thinking can be a bit restrictive, when you consider the contrast between these two (perfectly acceptable in our programming wooooorrrrlllldd) approaches. Lateral thinking can help us too, perhaps to broaden the discussion, and emoliate our prejudices. And bravo the client side web browser web inspectors of this woooooooorrrrrrrlllllldddd.

Stop Press

We’ve added some additional emoji flag functionality into Looks Nice Game via …

  1. the “parent” HTML the changed wls_vs_php.htm … calling …
  2. the “child” HTML the changed colour_wheel.html

Previous relevant Worldbank API Comparison Year More Indicators Tutorial is shown below.

Worldbank API Comparison Year More Indicators Tutorial

Worldbank API Comparison Year More Indicators Tutorial

Today’s progress onto yesterday’s Worldbank API Comparison Year Google Chart Mobile Tutorial is a callback to the original reason for the work, that being a graphical way to present what is the real marvel of proceedings, the amazing breadth and depth of public data presented at The World Bank – Indicators | Data, thanks. Sometimes we tend to ignore the primary source of information, but we need to acknowledge every now and again, such “founts of information”, broken into indicators within the categories …

  • Agriculture & Rural Development
  • Aid Effectiveness
  • Climate Change
  • Economy & Growth
  • Education
  • Energy & Mining
  • Environment
  • External Debt
  • Financial Sector
  • Gender
  • Health
  • Infrastructure
  • Poverty
  • Private Sector
  • Public Sector
  • Science & Technology
  • Social Development
  • Social Protection & Labor
  • Trade
  • Urban Development

Pretty impressive! We’ve chosen a few new indicators to add to the pre-existant top two of …

  • Population
  • Gross Domestic Product
  • Access to electricity (% of population)
  • Forest Area (sq km)
  • Agricultural Land (sq km)
  • Fertility rate, total (births per woman)
  • Hospital Beds (per 1,000 people)
  • Rail Lines (total route-km)
  • Labor Force, Total
  • Population density (people per sq. km of land area)
  • Time required to start a business (days)

… “Access to electricity (% of population)” noteworthy Pie Chart wise benefitting from option part pieSliceText: “value”, … the general “theme” being the more we all find out, the better we are to tackle the worldwide discussions we all need to have regarding Earth’s big issues.

This needed changes to …


Previous relevant Worldbank API Comparison Year Google Chart Mobile Tutorial is shown below.

Worldbank API Comparison Year Google Chart Mobile Tutorial

Worldbank API Comparison Year Google Chart Mobile Tutorial

Yesterday’s Worldbank API Comparison Year Pie Chart Differences Tutorial involved Google Charts Pie Chart Difference graphics that …

  • needed work to be functional on mobile platforms, allowing for some Javascript tweaking of the options of those Google ChartPie Chart Difference options … with the …
  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way … supplying a screen width …

    var whsuffix='';
    var deviceWidth = window.orientation == 0 ? window.screen.height: window.screen.width;
    var deviceHeight = window.orientation == 0 ? window.screen.width : window.screen.height;
    var rectis=document.body.getBoundingClientRect();
    if (('' + rectis.width).replace('px','').replace(/0/g,'') != '' && ('' + rectis.height).replace('px','').replace(/0/g,'') != '') {
    deviceWidth=('' + rectis.width).replace('px','');
    deviceHeight=('' + rectis.height).replace('px','');
    }
    whsuffix='&swidth=' + ('' + eval(('' + deviceWidth).replace('px','')) * 1.0) + '&sheight=' + ('' + eval(('' + deviceHeight).replace('px','')) * 1.0);

    … via a suffix to its URL call of the …
  • “child” supervised you could call worldbank_population_data.php changed in this way
    <?php

    $widea=620;
    if (isset($_GET['swidth'])) {
    $widea=$_GET['swidth'];
    $widea/=3.0;
    } else if (isset($_POST['swidth'])) {
    $widea=$_POST['swidth'];
    $widea/=3.0;
    }
    $widea=round($widea);
    //
    // later ... in an echo " some HTML " bit ...
    //
    <input type='hidden' name='moreopt' value=' width: " . $widea . ", height: 1200, chartArea: { width: \"86%\", height: \"70%\" }, '></input>

    ?>
    … we think we’ve come up with a better compromise for all … and today we turn a lot of attention to …
  • start improving the Year “through to” Year functionality calling on …
  • Area Chart interfacing area_chart.php is the changed PHP programming source code as per changes
  • Bar Chart interfacing bar_chart.php is the changed PHP programming source code as per changes
  • Column Chart interfacing column_chart.php is the changed PHP programming source code as per changes
  • Line Chart interfacing line_chart.php is the changed PHP programming source code as per changes
  • … what we like to think of as “the statistical charts”, improving …

    1. emoji flags
    2. legend size … and in so doing, opening the door to …
    3. future parameterization of these chart options, via a “parent”‘s business logic (without having to change the Charts so much again)

    … also affecting …

  • pie_chart.php changed this way
  • pie_chart_diff.php changed this way

As you may well be familiar with, here is a live run link to try this WorldBank data reporting yourself.


Previous relevant Worldbank API Comparison Year Pie Chart Differences Tutorial is shown below.

Worldbank API Comparison Year Pie Chart Differences Tutorial

Worldbank API Comparison Year Pie Chart Differences Tutorial

When you compare two year data sets with the web application of yesterday’s Worldbank API World Country Reporting Revisit Tutorial you are likely to be accessing the Google Charts Pie Chart Differences tool using Google”smarts” to compare two data sets via three graphical components.

Those “graphical components” are each “entities” in terms of servicing any Google Charts “select” event logic. In order to still have some “select” (onclick) event logic we needed to compromise in two ways …

  • onmouseover tooltips could not be supported
  • the smaller Pie Chart slices two small to display a percentage value have not be zeroed into

… and so we become keen to help out here in two ways …

  1. try to make the legend not need clicking (and so size it to be a full list, at least for single letter executions) … thanks to this useful link, thanks, for lead to

    <form onsubmit='return preiframeviaurl();' target='myiframe' id='myform' style='display:none;' method='POST' action='" . $preudiff . $udiff . ".php'>
    <input type='hidden' name='title' id='title' value='" . $reportmode2 . " by World Country " . $startswith . " for Year " . $tbit . "'></input>
    " . $onclick . "
    <input type='hidden' name='task' id='task' value='" . $reportmode . "'></input>
    <input type='hidden' name='desc' id='desc' value='" . $reportmode . "'></input>
    <input type='hidden' name='label' id='label' value='Year'></input>
    <input type='hidden' name='value' id='value' value='" . str_replace('%2c','',str_replace('%2C','',$valuelist)) . "'></input>
    <input type='hidden' name='onclick' value='y'></input>
    <input type='hidden' name='moreopt' value=' width: 620, height: 1200, chartArea: { width: \"50%\", height: \"70%\" }, '></input>
    <input type='hidden' name='data' id='data' value='" . explode("&data=",$url)[1] . "'></input>" . "\n" . $idata2 . "\n" . "
    <input id='mysubmit' type='submit' value='Draw Pie Chart'></input>
    </form>
  2. make sure a full data list appears (along with emoji flags and population numbers) in the Javascript prompt window value part

This involved the “supervisory child” …


Previous relevant Worldbank API World Country Reporting Revisit Tutorial is shown below.

Worldbank API World Country Reporting Revisit Tutorial

Worldbank API World Country Reporting Revisit Tutorial

We’re revisiting the PHP web application of Worldbank API World Country Reporting Regex Tutorial for a few days to …

  • add some emoji flags
  • fix some event logic weaknesses, starting today with the single year Worldbank Data incarnations (thanks to World Bank API), but not finished as far as comparison years Worldbank Data incarnations
  • fix Mixed Content issues to allow for seamless SSL https: or http: URL usage

So, today, both “parent” HTML and “child” PHP changed today so that …

… overseeing Google Chart Pie Chart interfacing that changed as per pie_chart.php changed this way and pie_chart_diff.php changed this way.

Try a live run link for yourself to see where we are going with this.


Previous relevant Worldbank API World Country Reporting Regex Tutorial is shown below.

Worldbank API World Country Reporting Regex Tutorial

Worldbank API World Country Reporting Regex Tutorial

Don’t know why, but have often equated regex work in Javascript or PHP with “RegEx Rangers”, or some such other “superhero” categorization. That is because to wield RegEx principles is a bit like swinging a sword through the “butter” of coding problems. Its use can feel arcane, but using it can solve so many issues and simplify projects, it is unbelievable. Trouble I’ve always found is that I like to be presented with a RegEx “ask” as a user, but don’t think a lot of people like it. An upcoming tutorial, though, will show the wonders of a “RegEx” scenario for a text editing job we did recently … we’ll keep you posted on that.

But back to today’s “RegEx” thinking, building on top of yesterday’s Worldbank API World Country Reporting Range Tutorial. We ended up asking the user for optional “RegEx” matching criteria for name matches between the Worldbank API data’s …

  • key (or name)
  • value (numerical)

… properties, to add to the pre-existing, and still available, the “starting with” name filtering functionality we’ve had working ever since Worldbank API World Country Population Report Tutorial as shown way below.

RegEx “thinking” exists for both server and client parts of web applications, for us, consecutively with …

… and we use it with serverside PHP today, under the auspices of the preg_match function, though we most often use RegEx thinking with the Javascript replace function, as the way to make substitutions for more than one occurrence, (the one occurrence design being) a default “curiosity” (but can be useful too) about Javascript’s version of substitution. You may know this RegEx usage of the Javascript replace function as “global substitution”.

If you’re new to RegEx thinking let me outline just a few tips …

  • ^ can mean “start of”
  • $ can mean “end of”
  • . can sometimes mean “one existant character wildcard” … or sometimes it is % or ? for this in other “systems”
  • * can often mean “zero or more of preceding character wildcard”
  • [] and () bracketing rules are pretty crucial for the more esoteric usages … also study | usage

In our tutorial picture we are showing “land$” countries that would feature, if Greenland goes independent one day …

  • Greenland … “full of ice” … and …
  • Iceland … “full of green”

Again, both “parent” HTML and “child” PHP changed today so that …

… to facilitate better (optional) Country name filtering for users of the web application.


Previous relevant Worldbank API World Country Reporting Range Tutorial is shown below.

Worldbank API World Country Reporting Range Tutorial

Worldbank API World Country Reporting Range Tutorial

If you’ve been keeping up to date with the latest thread of blog postings regarding our “Worldbank API World Country Reporting Project” web application, you’ll notice that there is no mention of a Worldbank API indicators in the blog title. That is because we still have “generic” matters to consider, but that is not an imposition to the web application design today. Today, as well as …

  • the original alphabetic starting with country filter (to key below) … we’ve added, today, a …
  • value “range” filter (to value below) applied to the reporting theme’s numerical value

… and because everything reported on has a …

  • key (or name)
  • value (numerical)

… basis, we can apply today’s value “range” filter generically “across the board” (for any of the indicators “Population” and “Gross Domestic Product”, so far).

Why do we use the word “filter” here? Well, a filter limits something, and we’re limiting the maximum amount of output data reported on, by, optionally, taking what a user says about the minimum and maximum (numerical) value ranges for data reporting.

In the case of Google Charts, when there is lots of data too close together to view it definitively, it does some clever data reduction, and we have a means today, to get in under that data reduction to more esoteric reporting possibilities, as a result of our new filter, used well by the user.

Let’s show you how a cluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&justletters=y

… can become uncluttered http://www.rjmprogramming.com.au/PHP/worldbank_population_data.php?startswith=C&year=2015&yearvs=-2011&max=40000000&justletters=y for those smaller values, by using this value “range” filter below …

So yet again, both “parent” HTML and “child” PHP changed today so that …

  • “parent” supervisory web application has HTML (and Javascript and CSS) you could call worldbank_population_data.htm changed in this way
  • “child” supervised you could call worldbank_population_data.php changed in this way that if you examine you can see the use of PHP cookie methods for the first time here (as we usually use Javascript), specifically, reading and creating (via PHP setcookie method) HTTP Cookies as per the code …

    function rangeget($basis) {
    global $reportmode;
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    if (isset($_COOKIE[$cookie_name])) {
    return $_COOKIE[$cookie_name];
    }
    return 0.0;
    }

    function rangeset($basis, $val) {
    global $reportmode, $startswith;
    if ($startswith == "") {
    $cookie_name = "Worldbank_" . str_replace(" ","_",$reportmode) . "_" . $basis;
    $cookie_value = $val;
    setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/PHP/"); // 86400 = 1 day
    return $val;
    }
    return rangeget($basis);
    }

And so yet again, we would welcome you trying this web application for yourself to try out the new value range filtering functionality that we also talk about at WordPress 4.1.1’s Worldbank API World Country Reporting Range Tutorial.


Previous relevant Worldbank API World Country Gross Domestic Product Tutorial is shown below.

Worldbank API World Country Gross Domestic Product Tutorial

Worldbank API World Country Gross Domestic Product Tutorial

We’ve changed onion types today in our quest for the ultimate “onion of the 4th dimension” concept this project, that being our … oops, the goalposts have shifted … web application project “Worldbank API World Country Population Report Project” where we extend the “scope” of the “indicators” we can report on to those we presented yesterday with Worldbank API World Country Population Period Tutorial, those being the original …

… and here you may have sneaked a peek below to see that …

  • nothing codewise has been added to in terms of “pieces of code” … we thank the excellence of (the organization of the) Worldbank API for this, as the form of the GDP data is not enough different to that of the Population data to warrant us thinking that we needed to change anything other than versions … and …
  • nothing codewise has been renamed in terms of “pieces of code” … and that is us … we’re not embarrassed that a “guinea pig” for an idea gets extended into a bigger picture … so long as “Worldbank” is there in the name somewhere

This “guinea pig” method of extending a project has its advantages and disadvantages as most methods of doing things (inherently) have (their own) advantages and disadvantages. The “guinea pig” approach may suffer if things become complex later when you try to fit in another “extended” concept that is a bit of a “square hole” being forced into our “round socket” … (😄💖🔴). Conversely, if things stay simple enough, why not use methods like …

  • plugging in a programmatic “variable” where once there was a “hardcoding” … and …
  • plugging in (the equivalent of) an HTML select element “dropdown” where once there was a titular piece of text

… to keep on pushing out the “onion” types … we know you’re out there … come an’ show us the cut of your jib!

Yet again, both “parent” HTML and “child” PHP changed today for the new extended “indicator” reporting (adding GDP to pre-existing Population indicator(s)), so that …

And yet again, we would welcome you trying this web application for yourself to try out this new “layer” of functionality “positioning”.


Previous relevant Worldbank API World Country Population Period Tutorial is shown below.

Worldbank API World Country Population Period Tutorial

Worldbank API World Country Population Period Tutorial

Yesterday’s Worldbank API World Country Population Trend Tutorial started us on the topic of “trends” with data and our Google Chart Pie Chart Differences representation of Worldbank API derived data took the form of the first of …

  • snapshot (of two different snapshotted times) … but today we turn our attention to …
  • period of time (of several regular snapshotted times)

… and for the purposes of this latter “chart” reporting we like, around here, still talking in terms of Google Charts, in order of our opinion “regarding quality of reporting purpose” with regard to this Worldbank API Population data reporting …

  • Line Chart
  • Column Chart
  • Bar Chart
  • Area Chart

… all Google Chart “types” looking for the same basic form of data, the hint, in the first place, why we associate these all together with that new period of time reporting options we’ve integrated into the web application at the “parent” HTML supervisor level by, for every new option from yesterday of the form [year] compared to in that top lefthand HTML select element “dropdown”, we also add in an associated [year] through to “dropdown” option which, if selected, will present the user with the opportunity to select the type of Google Chart they’d like to see from the list of four chart types as described above.

Again, both “parent” HTML and “child” PHP changed today for that period of time concept of reporting, so that …

And again, we would welcome you trying this web application for yourself, to get this into perspective regarding perhaps, your own opinions about the pros and cons, strengths and weaknesses of the various very useful Google Chart ideas we appreciate for those reporting tasks, helping support the adage “every picture is worth a thousand words”.


Previous relevant Worldbank API World Country Population Trend Tutorial is shown below.

Worldbank API World Country Population Trend Tutorial

Worldbank API World Country Population Trend Tutorial

The “onion of the 4th dimension” way to go (after yesterday’s Worldbank API World Country Population Report Tutorial as shown below) for our latest web application project “Worldbank API World Country Population” we like is to now start thinking of a means to show “trends” in population. With this in mind there is a ready made Google Chart Pie Chart Differences to help here. With the Google Chart Pie Chart Differences we’ll supply two different years worth of data, and the cleverness of this Google Chart product is called into play to show three Pie Charts, namely …

  • original year’s Pie Chart Worldbank API data
  • “compared to” year‘s Pie Chart data
  • a Google Chart Pie Chart Differences “trend” Pie Chart showing an “inner ring” Pie Chart within an “outer ring” Pie Chart where you can get a sense of “trends” that are taking place

… that is manifested in the “parent” HTML code by changing the previous hardcoded “Year” word with an HTML select element “dropdown” element to define that optional second “compared to” year of interest.

The other new functionality today is a “share” via Email emoji (HTML a link “button”) that latches on to the user’s Email client program via Middle Word Share Tutorial‘s approach, namely …

mailto:[emailAddress]?subject=[Subject]&body=[URLtoLinkTo] type of href property (on that link). As you can imagine, it is possible to piece together a Javascript encodeURIComponent() version of [URLtoLinkTo] value via the current webpage’s document.URL

… the curious variation being that we don’t think of the “parent” HTML’s document.URL here (in blurb above), but, rather, it is more useful to consider the “child” HTML iframe element PHP’s document.URL both as an easier to code concept, and the simplifier of “length of data” GET vs POST HTML form element originated data issues. You see, if your data getting to the Pie Chart is over a certain length, it will be POSTed and you would lose the opportunity to Email this (in that mailto: email client program way), because you rely on real GET method URLs for this approach. At the “view” of the middle “child” PHP, though, it gets its calls, always, in a GET URL way, so it is, counterintuitively, the best (and simplest) place to intervene and code for this Email “share” functionality.

Both “parent” HTML and “child” PHP changed today, so that …

We would welcome you trying this web application for yourself, to get this into perspective.


Previous relevant Worldbank API World Country Population Report Tutorial is shown below.

Worldbank API World Country Population Report Tutorial

Worldbank API World Country Population Report Tutorial

In yesterday’s Worldbank API World Country Population Primer Tutorial, as shown below, we noted …

the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and today we show some practical strategies to be more clear (less cluttered) with the data, should the user, optionally, be interested, here.

In practical terms, we built a supervisory HTML “parent” you could call worldbank_population_data.html (with this new live run link) on top of yesterday’s “duck with the legs moving fast” hard working “child” HTML iframe element housed PHP worldbank_population_data.php (changed this way to accomodate this move).

If you had to break up a huge chunk of Worldbank API data related to World Countries and their Population, what would you research as an idea to do this? No doubt a lot of people would agree with how we approach it, that being …


report via a "starting with" alphabetic criteria

Makes sense? We hope so, and we’ll also ask for a Year of interest, with the caveat that we should offer the user the “absolute thinking” that would say if you are doing a report on …


Population by World Country A for year 2015

… for example, you should offer the user to show Pie Charts for the two scenarios below …

  • World Country A Populations compared to each other … or …
  • World Country A Populations compared to each other and a Non-A Population entry (which totals all non-A country populations)

We could present these functionality options in an HTML select element “dropdown”, but we think today, we’ll use a top menu of HTML a links to interface to the user of this “parent” supervisory web application we welcome you to try out for yourself.


Previous relevant Worldbank API World Country Population Primer Tutorial is shown below.

Worldbank API World Country Population Primer Tutorial

Worldbank API World Country Population Primer Tutorial

Today we’re revisiting the absolutely astonishing resource that the Worldbank API website provides. Such free public sources of data are very much appreciated in our books. Not so much in our pamphlets, but definitely in the books. Revisiting we thought, perhaps, we heard you ask … or were you passing wind? Glad you asked. Remember when we presented PHP Worldbank Growth of Merchandise Trade Tutorial, as shown below? Then, we used Google Chart Bubble Chart to present reams of information. Today, we again broach “reams” of Wordbank Population data per country to present a Google Chart Pie Chart report.

On our “first draft” of this web application project we create just the one pie chart, but we do that, along the way showing you a couple of things …

  • the “reams” of data is processed on the understanding it could be sent to an HTML iframe as a URL plonked into that iframe element’s src property (as if), or if that URL is too long then that data is plugged into the HTML form and then sent (POSTed) to that same HTML iframe (whose name is the same as the form element’s target=name) via an HTML form element whose action property is set to …

    http://www.rjmprogramming.com.au/PHP/PieChart/pie_chart.php
  • the data is presented in some way shape or form with the Pie Chart, but for all the advantages of lots of information in the one place, it does suffer a bit with clutter

… and so we try some strategies to help with those clutter issues above in blog postings to come.

In the meantime, why not try a live run of the underlying PHP (serverside) web application you could call worldbank_population_data.php featuring …

  • use of PHP file_get_contents() to extract …
  • JSON data is extracted and parsed to help piece together that URL to the Google Chart Pie Chart, as mentioned way above

Previous relevant PHP Worldbank Growth of Merchandise Trade Tutorial is shown below.

PHP Worldbank Growth of Merchandise Trade Tutorial

PHP Worldbank Growth of Merchandise Trade Tutorial

We’ve said it before, and (no doubt) we’ll say it again … there are great public data sources out there for you to explore.

As far as international data goes the Worldbank series of statistics is great, so, thanks.

Today we combine the Worldbank data for Growth of Merchandise Trade 2003-2013 with the wonderful Google Chart Bubble Chart to create (52 = (first letters of country name) 26 x 2 (concepts: Exports and Imports)) reporting charts of interest, we hope. Again, as with any reporting subject, it is a personal thing, whether the subject matter of a report is of interest, but you could say that about so many things in life.

So, we offer some PHP source code you could call growth_of_merchandise_trade.php and a live run link as well, the full loading of which requires patience.

Stop Press

Tomorrow we go over what was needed to change PHP code above to be more mobile friendly …

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Posted in eLearning, Event-Driven Programming, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Colouring In Drag and Drop Reveal Wikipedia Images Tutorial

Colouring In Drag and Drop Reveal Wikipedia Images Tutorial

Colouring In Drag and Drop Reveal Wikipedia Images Tutorial

At first, today, we thought we’d apply new “show Wikipedia image” ideas via …

  • Ajax methodologies … but then saw that …
  • iframe … <iframe onload=ouriaj(this); id=”ourifaj” src=” style=display:none;></iframe> … calls

… better fitted in with our functionalities, but the “feel” of the changes is definitely Ajaxish. We’ve gone off traditional Ajax thinking that worked off the “onmouseover” event in recent years, given mobile platforms have no support for this, but here in the drag and drop realms we can start letting Ajax back into our thinking. Ajax can be that way to display information pertinent to a part of the webpage that the user shows an eventful interest in.

So this Wikipedia imagery is shown as a HTML div … <div id=”ourcanvas” class=”custom-alert” title=”Images thanks to Wikipedia”></div> …

<style>

.custom-alert {
display: inline-block;
/* visibility: visible; */
background-color: rgba(102,102,102,0.8);
color: #fff;
text-align: enter;
margin: 5% auto;
padding: 12px 28px;
opacity: 0.9;
z-index: 200;
}

</style>

… overlayed over the Reveal option World Map image via …


function pcpos() {
if (document.getElementById('splacecross')) {
var ajrect=document.getElementById('splacecross').getBoundingClientRect();
ajaxstuffx.push(eval('' + ajrect.left));
ajaxstuffy.push(eval('' + ajrect.top));
if (document.getElementById('spancb').innerHTML.indexOf(' any of mountain ') != -1) {
ajaxstuff.push(document.getElementById('spancb').innerHTML.split(' any of mountain ')[1].split('?')[0].replace(/\ /g,'_'));
//revealajaxit();
} else if (document.getElementById('spancb').innerHTML.indexOf(' any of waterfall ') != -1) {
ajaxstuff.push(document.getElementById('spancb').innerHTML.split(' any of waterfall ')[1].split('?')[0].replace(/\ /g,'_'));
}
}
}

function showStuff() {
if (zhr != null) {
if (zhr.readyState == 4) {
if (zhr.status == 200) {
//alert(zhr.responseText);
document.getElementById('ourcanvas').style.position='absolute';
document.getElementById('ourcanvas').style.left='' + eval(10 + ajaxstuffx[eval(-1 + ajaxstuffx.length)]) + 'px';
document.getElementById('ourcanvas').style.top='' + eval(-600 + ajaxstuffx[eval(-1 + ajaxstuffx.length)]) + 'px';
document.getElementById('ourcanvas').style.width='600px';
document.getElementById('ourcanvas').style.height='600px';
document.getElementById('ourcanvas').innerHTML+=zhr.responseText;
}
}
}
}

function ajstuff(inspanoh) {
setTimeout(pcpos, 200);
return inspanoh;
}

function ajrstuff(inspanid) {
if (document.getElementById(inspanid).innerHTML.indexOf('<br>') != -1) {
ridis=inspanid;
var ajrect=document.getElementById(inspanid).getBoundingClientRect();
ajaxstuffx.push(eval('' + ajrect.left));
ajaxstuffy.push(eval('' + ajrect.top));
//alert(document.getElementById(inspanid).innerHTML.split('<br>')[1].split(' ...')[0].replace(/\ /g,'_'));
ajaxstuff.push(document.getElementById(inspanid).innerHTML.split('<br>')[1].split(' ...')[0].replace(/\ /g,'_'));
revealajaxit();
}
return inspanid;
}

function sbnull() {
document.getElementById('outcanvas').innerHTML='<div id="ourcanvas" class="custom-alert" title="Images thanks to Wikipedia"></div>';
document.getElementById('ourcanvas').innerHTML='';
}

function antirevealajaxit() {
zhr=null;
lastajaxstuff='';
ajstuff=[];
ajstuffx=[];
ajstuffy=[];
document.getElementById('ourcanvas').style.opacity='0.0';
document.getElementById('ourcanvas').innerHTML='';
document.getElementById('ourcanvas').style.width='0px';
document.getElementById('ourcanvas').style.height='0px';
sbnull();
}

function ouriaj(iois) {
if (iois != null && iois.src.indexOf('tznickname=') != -1) {
ajaconto = (iois.contentWindow || iois.contentDocument);
if (ajaconto.document) { ajaconto = ajaconto.document; }
//if (ajaconto != null) {
// alert(ajaconto.body.outerHTML);
//}
}
}

function changewim() {
if (document.getElementById('wim')) {
if (!document.getElementById('wim').checked) { wscoreafter=wscoreafter.replace(' checked', ' data-chk=""'); return ''; } else { wscoreafter=wscoreafter.replace(' data-chk=""', ' checked'); }
}
}

function revealajaxit() {
var dgis='', idis='splacecross';
if (document.getElementById('wim')) {
if (!document.getElementById('wim').checked) { wscoreafter=wscoreafter.replace(' checked', ' data-chk=""'); return ''; } else { wscoreafter=wscoreafter.replace(' data-chk=""', ' checked'); }
} else if (wscoreafter.trim() == '' || wscoreafter.indexOf(' checked') == -1) {
return '';
} else {
wscoreafter='';
}
var dgis='', idis='splacecross';
if (ridis != '') { idis=ridis; setTimeout(function(){ ridis=''; }, 3000); }
//alert(ajaxstuff[eval(-1 + ajaxstuff.length)]);
if (1 == 1) {
var inthere=-1;
if (ajaxstuff[eval(-1 + ajaxstuff.length)].indexOf('/wiki/') != -1) {
inthere=document.getElementById('tzlist').innerHTML.indexOf('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/option');
} else {
ajaxstuff.push((document.getElementById(idis).innerText.split(' is in ')[0].replace(/^x/g,'').replace(/^\./g,'').replace(String.fromCharCode(10),'').replace(/\ /g,'_')));
inthere=document.getElementById('tzlist').innerHTML.indexOf('/' + ajaxstuff[eval(-1 + ajaxstuff.length)] + '/option');
}
if (inthere != -1 || 3 == 3) {
if (7 == 7) {
document.getElementById('ourcanvas').style.position='absolute';
document.getElementById('ourcanvas').style.left='' + eval(50 + ajaxstuffx[eval(-1 + ajaxstuffx.length)]) + 'px';
document.getElementById('ourcanvas').style.top='' + eval(-350 + ajaxstuffx[eval(-1 + ajaxstuffy.length)]) + 'px';
document.getElementById('ourcanvas').style.width='600px';
document.getElementById('ourcanvas').style.height='600px';
document.getElementById('ourcanvas').style.opacity='0.3';
//document.getElementById('ourcanvas').innerHTML+=zhr.responseText;
//alert(ajaxstuff[eval(-1 + ajaxstuff.length)] + ' ' + inthere);
if (inthere != -1) {
if (ajaxstuff[eval(-1 + ajaxstuff.length)].indexOf('/wiki/') != -1) {
dgis='//www.rjmprogramming.com.au/PHP/fgc/?tzexact=' + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'")[eval(-1 + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'").length)] + '%2F' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '&tznickname=' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1];
} else {
dgis='//www.rjmprogramming.com.au/PHP/fgc/?tzexact=' + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)] + '/')[0].split("'")[eval(-1 + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)] + '/')[0].split("'").length)] + '%2F' + ajaxstuff[eval(-1 + ajaxstuff.length)] + '&tznickname=' + ajaxstuff[eval(-1 + ajaxstuff.length)];
}
} else {
dgis='//www.rjmprogramming.com.au/PHP/fgc/?tzexact=&tznickname=' + ajaxstuff[eval(-1 + ajaxstuff.length)];
}
if (dgis != document.getElementById('ourifaj').src && dgis.trim() != '') {
document.getElementById('ourifaj').src=dgis;
}
} else {
//alert(ajaxstuff[eval(-1 + ajaxstuff.length)]);
zhr = new XMLHttpRequest();
//alert('//www.rjmprogramming.com.au/PHP/fgc/?tzexact=' + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'")[eval(-1 + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'").length)] + '%2F' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '&tznickname=' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1]);
zhr.open('get', '//www.rjmprogramming.com.au/PHP/fgc/?tzexact=' + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'")[eval(-1 + document.getElementById('tzlist').innerHTML.split('/' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '/')[0].split("'").length)] + '%2F' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1] + '&tznickname=' + ajaxstuff[eval(-1 + ajaxstuff.length)].split('/wiki/')[1], true);
zhr.onreadystatechange = showStuff;
zhr.send(null);
}
}
} else {
return '';
zhr = new XMLHttpRequest();
zhr.open('get', ajaxstuff[eval(-1 + ajaxstuff.length)], true);
zhr.onreadystatechange = showStuff;
zhr.send(null);
}
}

… as progress on top of the recent Colouring In Drag and Drop Mobile Journey Game Tutorial.

Codewise this needed …


Previous relevant Colouring In Drag and Drop Mobile Journey Game Tutorial is shown below.

Colouring In Drag and Drop Mobile Journey Game Tutorial

Colouring In Drag and Drop Mobile Journey Game Tutorial

We needed to considerably change yesterday’s Colouring In Drag and Drop Pseudo Element Content Tutorial “Journey Game” logic to work with mobile platforms, to do with …

  • for “easy” Journey Game options we change size of “mytable” table and hide any bottom 💣 bomb emoji display …

    var mapcontext=null;

    function canvasize() {

    //document.getElementById('xmwr').innerHTML+='<sty' + 'le> tr { height: 1vh; } </sty' + 'le>';
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    document.getElementById('xmwr').innerHTML+='<sty' + 'le> td { overflow: hidden !important; } </sty' + 'le>';
    }

    var tryimg=document.createElement('img');
    tryimg.onload=function(e){
    var trrectis=null;
    var divvs=document.getElementById('mytable');
    newcanvas=document.getElementById('mymobilecanvas');

    //newcanvas.height=Math.round(tryimg.height * eval(('' + divvs.style.width).replace('px','')) / tryimg.width);
    newcanvas.width=eval(('' + divvs.style.width).replace('px',''));
    newcanvas.height=eval(0.5 * eval(('' + divvs.style.width).replace('px','')));

    mapcontext=newcanvas.getContext('2d');
    mapcontext.drawImage(tryimg, 0, 0, tryimg.width, tryimg.height, 0, 0, newcanvas.width, newcanvas.height);

    document.getElementById('mytbody').style.height='' + eval(0.5 * newcanvas.width) + 'px';
    document.getElementById('mytable').style.height='' + eval(0.5 * newcanvas.width) + 'px';


    //newcanvas.style.display='block';
    var divvsr=document.getElementById('mytable').getBoundingClientRect();
    var trls=document.getElementsByTagName('tr');
    for (var itrls=0; itrls<trls.length; itrls++) {
    if (('' + trls[itrls].id + ' ').substring(0,2) == 'tr') {
    trrectis=trls[itrls].getBoundingClientRect();
    if (('' + trls[itrls].id) != ('tr' + (across == 3 ? 99 : across)) && eval(eval('' + trrectis.top) - eval('' + divvsr.top)) > eval('' + eval(0.5 * newcanvas.width))) {
    trls[itrls].style.display='none';
    //alert('here ' + trls[itrls].id);
    } //else {
    //document.title='' + eval('' + trrectis.top) + ' - ' + eval('' + divvsr.top) + ' <= ' + eval('' + eval(0.5 * newcanvas.width));
    //}
    }
    }

    };
    tryimg.src='/HTMLCSS/HYP_50M_SR_W.jpg';

    return true;
    }
  • mobile tr (ie. table row) element heights were not constrained … but now are via directing mobile emoji content to cell itself

    if (navigator.userAgent.match(/iPad/i)) {
    gonto.innerHTML='' + String.fromCodePoint(journeyemoji) + '';
    gonto.innerHTML='<span class=tiny style="font-size:4px;overflow:hidden;">' + String.fromCodePoint(journeyemoji) + '</span>';
    } else if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    gonto.innerHTML='' + String.fromCodePoint(journeyemoji) + '';
    gonto.innerHTML='<span class=tiny style="font-size:2px;overflow:hidden;">' + String.fromCodePoint(journeyemoji) + '</span>';
    } else {

    gonto.innerHTML='<span class=tiny style="font-size:6px;">' + String.fromCodePoint(journeyemoji) + '</span>';
    }
  • Javascript popup alert window can be refused by the mobile platform web browsers (thanks to heads up that this can happen), especially if they “just proceed a location.href defining codeline” …

    if (document.getElementById('pensel').value == '128668') {
    journeycount++;
    evs.push(gred(onto));
    //document.title='' + onto.id;
    if (('' + onto.id).indexOf('TD') == 0) {
    if (!decided) {
    decided=true;
    ctyqgoes++;
    documentURL=document.URL;
    if (documentURL.indexOf('?') == -1) { documentURL=documentURL.replace('.php','.php?journey=' + Math.floor(Math.random() * 19878675)); }
    onto.style.backgroundColor='darkred';
    //onto.innerHTL='<span class=tiny style="font-size:6px;background-color:darkred;">' + String.fromCodePoint(128165) + '</span>'; //String.fromCodePoint(128165);
    //document.getElementById('xmwr').innerHTML+='<sty' + 'le> #' + onto.id + "::after { content:'\\01F4A3'; } </sty" + 'le>';
    document.getElementById('xmwr').innerHTML+='<sty' + 'le> #' + onto.id + "::after { content:'\\01F4A5'; background-color: darkred; font-size:12px; } </sty" + 'le>';
    document.getElementsByTagName('h1')[0].innerHTML=document.getElementsByTagName('h1')[0].innerHTML.replace('Experimental Drag and Drop', 'Boom! ' + String.fromCodePoint(128165) + ' Sorry, we told you it was <font color=darkgreen>h</font><font color=greenyellow>a</font><font color=yellowgreen>z</font><font color=yellow>a</font><font color=pink>r</font><font color=orange>d</font><font color=lightred>o</font><font color=red>u</font><font color=darkred>s</font>?!');
    locationhref=(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=' + czero + czero)) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';

    setTimeout(function(){
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    location.href=locationhref;
    } else {

    alert('Boom! ' + String.fromCodePoint(128165) + ' Sorry, we told you it was hazardous?!');
    if (locationhref.indexOf('journey=00') != -1) { locationhref=locationhref.replace('journey=00', 'journey=6'); }
    setTimeout(function(){
    location.href=locationhref; }, 3000); //(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=' + czero)) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    }
    //}
    }, 3000);
    //return null;
    }
    } else if (eval('' + journeycount) >= eval('' + (across == 3 ? 99 : across))) {
    if (eval(('' + onto.id).substring(2).split('_')[0].replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'')) == 1) {
    if (!decided) {
    decided=true;
    if (('' + document.getElementById('scy').value) == 'supereasy') {
    ctyqscore++;
    } else if (('' + document.getElementById('scy').value) == 'easy') {
    ctyqscore+=2;
    } else {
    ctyqscore+=3;
    }
    ctyqgoes++;

    document.getElementsByTagName('h1')[0].innerHTML=document.getElementsByTagName('h1')[0].innerHTML.replace('Experimental Drag and Drop', 'You made it! Congratulations! ');
    onto.style.backgroundColor='darkgreen';
    documentURL=document.URL;
    locationhref=(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    if (documentURL.indexOf('?') == -1) { documentURL=documentURL.replace('.php','.php?journey=' + Math.floor(Math.random() * 19878675)); }

    setTimeout(function(){
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    location.href=locationhref;
    } else {
    //setTimeout(function(){

    alert('You made it! Congratulations! ');
    location.href=locationhref; //(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    //}, 30);
    //return '';
    }
    }, 3000);


    }
    } else if (eval(('' + onto.id).substring(2).split('_')[0].replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'')) == (across == 3 ? 99 : across)) {
    if (!decided) {
    decided=true;
    if (('' + document.getElementById('scy').value) == 'supereasy') {
    ctyqscore++;
    } else if (('' + document.getElementById('scy').value) == 'easy') {
    ctyqscore+=2;
    } else {
    ctyqscore+=3;
    }
    ctyqgoes++;
    document.getElementsByTagName('h1')[0].innerHTML=document.getElementsByTagName('h1')[0].innerHTML.replace('Experimental Drag and Drop', 'You made it! Congratulations! ');
    onto.style.backgroundColor='darkgreen';
    documentURL=document.URL;
    locationhref=(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    if (documentURL.indexOf('?') == -1) { documentURL=documentURL.replace('.php','.php?journey=' + Math.floor(Math.random() * 19878675)); }
    setTimeout(function(){
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    location.href=locationhref;
    } else {
    //setTimeout(function(){

    alert('You made it! Congratulations! ');
    location.href=locationhref; //(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    //}, 30);
    //return '';
    }
    }, 3000);

    }
    } else if (eval(('' + onto.id).substring(2).split('_')[1].replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'')) == 1) {
    if (!decided) {
    decided=true;
    if (('' + document.getElementById('scy').value) == 'supereasy') {
    ctyqscore++;
    } else if (('' + document.getElementById('scy').value) == 'easy') {
    ctyqscore+=2;
    } else {
    ctyqscore+=3;
    }
    ctyqgoes++;
    document.getElementsByTagName('h1')[0].innerHTML=document.getElementsByTagName('h1')[0].innerHTML.replace('Experimental Drag and Drop', 'You made it! Congratulations! ');
    onto.style.backgroundColor='darkgreen';
    documentURL=document.URL;
    locationhref=(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    if (documentURL.indexOf('?') == -1) { documentURL=documentURL.replace('.php','.php?journey=' + Math.floor(Math.random() * 19878675)); }
    setTimeout(function(){
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    location.href=locationhref;
    } else {
    //setTimeout(function(){

    alert('You made it! Congratulations! ');
    location.href=locationhref; //(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    //}, 30);
    //return '';
    }
    }, 8000);

    }
    } else if (eval(('' + onto.id).substring(2).split('_')[1].replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'')) == (across == 3 ? 99 : across)) {
    if (!decided) {
    decided=true;
    if (('' + document.getElementById('scy').value) == 'supereasy') {
    ctyqscore++;
    } else if (('' + document.getElementById('scy').value) == 'easy') {
    ctyqscore+=2;
    } else {
    ctyqscore+=3;
    }
    ctyqgoes++;
    document.getElementsByTagName('h1')[0].innerHTML=document.getElementsByTagName('h1')[0].innerHTML.replace('Experimental Drag and Drop', 'You made it! Congratulations! ');
    onto.style.backgroundColor='darkgreen';
    documentURL=document.URL;
    locationhref=(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    if (documentURL.indexOf('?') == -1) { documentURL=documentURL.replace('.php','.php?journey=' + Math.floor(Math.random() * 19878675)); }
    setTimeout(function(){
    if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i)) {
    location.href=locationhref;
    } else {
    //setTimeout(function(){

    alert('You made it! Congratulations! ');
    location.href=locationhref; //(documentURL.split('&')[0].split('#')[0].replace('journey=', 'journey=7')) + '&scorej=' + ctyqscore + '&goesj=' + ctyqgoes + '#JourneyReveal';
    //}, 30);
    //return '';
    }
    }, 8000);

    }
    }
    }
    } else {
    evs.push(onto);
    }
  • we needed some extra consideration sharing a “Journey Game” with email or SMS recipients …

    tableohprefixbit=tableohprefixbit.replace(encodeURIComponent(' (where red is nearest danger and you try to navigate between World edges)'), '');
    if (tableohprefixbit.indexOf('?') != -1 && documentURL.indexOf('journey=') == -1 && selem == 128668) {
    tableohprefixbit=tableohprefixbit.replace('?', '?journey=' + Math.floor(Math.random() * 19878675) + '&');
    }
  • we needed less wordiness for the mobile platforms regarding that instructional span element contents …
    <?php

    $changeanyto='width:' . trim(explode(';', explode('width:', str_replace(' (where red is nearest danger and you try to navigate between World edges)','',str_replace('+',' ',urldecode($_GET['tableohprefix']))))[1])[0]) . ';height:' . trim(explode(';', explode('height:', str_replace('+',' ',urldecode($_GET['tableohprefix'])))[1])[0]) . ';';

    ?>

Codewise this needed …


Previous relevant Colouring In Drag and Drop Hazardous Journey Game Tutorial is shown below.

Colouring In Drag and Drop Hazardous Journey Game Tutorial

Colouring In Drag and Drop Hazardous Journey Game Tutorial

Back to thinking about Drag and Drop, a lot of the way it works, favours web application game development. You don’t even have to involve the “drop” part of the concept. Just using the “drag” part, and the “ondragover” event, in particular, can be interesting, as we hope you’ve picked up from the work of our current focus, our Colouring In web application.

Long way from just “Colouring In” by now. In actuality it could be “The Drag Show”, but we all know we don’t have the “realia pizzazz” for that title?!

Today, another Reveal option has been added onto the progress of yesterday’s Colouring In Drag and Drop Browse Button CSS Tutorial, which you could call …


Hazardous Journey Game

It involves …

  • map of the world background image … like the other Reveal quizzes and games … and …
  • hidden (like in the minesweeper game) table cells that stop the user in their tracks should they land on them … and …
  • the user can try to start at one World Map edge and try to get to another (over a long enough distance) … following …
  • colour coded Colouring In of table cells (the redder the more imminently dangerous) … as well as …
  • a “hint” system in the “easy” category of play showing these dangerous cells (being as, nobody here is saying anything about this game being easy … but Life Wasn’t Meant to be Easy)

In the PHP parent we capitalize the IDs of dangerous cells …

<?php

for ($thisrow=1; $thisrow<=$across; $thisrow++) {
$cthisrow='0000000000' . $thisrow;
//$rowsofar='<tr id=svgtr' . $thisrow . ' onclick=textbthis(event); style="width:100%;" id=tr' . substr($cthisrow, -$iacross, $iacross) . '></tr>';
$rowsofar='<tr id=tr' . ltrim(substr($cthisrow, -$iacross, $iacross),'0') . ' onclick=textbthis(event); style="width:100%;"></tr>';
//$rowsofar='<tr id=svgtr' . $thisrow . ' style="width:100%;"></tr>';
$ynftone='youllneverfindthis';
$ynfttwo='youllneverfindthis';
$yynftone='youllneverfindthis';
$yynfttwo='youllneverfindthis';
$thistdid='td' . substr($cthisrow, -$iacross, $iacross) . '_';
for ($thiscol=1; $thiscol<=$across; $thiscol++) {
$ynftone='youllneverfindthis';
$ynfttwo='youllneverfindthis';
$yynftone='youllneverfindthis';
$yynfttwo='youllneverfindthis';
$ibv=rand(0, $across);
if ($ibv < ($across / 11) && (isset($_GET['journey']) || isset($_POST['journey']))) {
$ynftone='td';
$ynfttwo='TD';
$yynftone='one';
$yynfttwo='two';
}

$cthiscol='0000000000' . $thiscol;
$thistdidsuffix='' . substr($cthiscol, -$iacross, $iacross) . '';
$rowsofar=str_replace('></tr>', '><td class="td' . str_replace($yynftone, $yynfttwo, 'one') . '" id=' . str_replace($ynftone, $ynfttwo, $thistdid) . $thistdidsuffix . ' style=text-align:center; data-answer=' . $ttcnt . '></td></tr>', $rowsofar);
}
$newih=str_replace('</tbody>', $rowsofar . '</tbody>', $newih);
}

?>

… and this is used in some new HTML and Javascript basis functionality …


var journeyred='red';

function gred(gonto) {
var dangercount=0;
var bxcols=['darkgreen','greenyellow','yellowgreen','yellow','pink','orange','lightred','red','darkred'];
var currow=('' + gonto.id).substring(2).split('_')[0];
var curcol=('' + gonto.id).substring(2).split('_')[1];
var jrow=eval('' + currow.replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,''));
var jcol=eval('' + curcol.replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,'').replace(/^0/g,''));
var crow=currow;
var ccol=curcol;
journeyred=bxcols[0]; //bxcols[Math.floor(Math.random() * bxcols.length)];
if (('' + gonto.id).substring(0,2) == 'TD') {
journeyred='darkred';
} else {
if (document.getElementById('TD' + ('00000000' + eval(-1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ccol )) {
dangercount++;
}
if (document.getElementById('TD' + ('00000000' + eval(1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ccol )) {
dangercount++;
}

if (document.getElementById('TD' + crow + '_' + ('00000000' + eval(-1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}
if (document.getElementById('TD' + crow + '_' + ('00000000' + eval(1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}

//document.title='TD' + ('00000000' + eval(-1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-1 + jcol)).slice(eval(0 - eval('' + curcol.length))) ;
if (document.getElementById('TD' + ('00000000' + eval(-1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}
if (document.getElementById('TD' + ('00000000' + eval(1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}

if (document.getElementById('TD' + ('00000000' + eval(-1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}
if (document.getElementById('TD' + ('00000000' + eval(1 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(1 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount++;
}

if (document.getElementById('TD' + ('00000000' + eval(-2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ccol )) {
dangercount+=0.5;
}
if (document.getElementById('TD' + ('00000000' + eval(2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ccol )) {
dangercount+=0.5;
}

if (document.getElementById('TD' + crow + '_' + ('00000000' + eval(-2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}
if (document.getElementById('TD' + crow + '_' + ('00000000' + eval(2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}

//document.title='TD' + ('00000000' + eval(-2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-2 + jcol)).slice(eval(0 - eval('' + curcol.length))) ;
if (document.getElementById('TD' + ('00000000' + eval(-2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}
if (document.getElementById('TD' + ('00000000' + eval(2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(-2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}

if (document.getElementById('TD' + ('00000000' + eval(-2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}
if (document.getElementById('TD' + ('00000000' + eval(2 + jrow)).slice(eval(0 - eval('' + currow.length))) + '_' + ('00000000' + eval(2 + jcol)).slice(eval(0 - eval('' + curcol.length))) )) {
dangercount+=0.5;
}

//if (dangercount != 0) { alert(dangercount); }
journeyred=bxcols[Math.round(dangercount)]; //'darkred';

}
return gonto;
}

Codewise this needed …


Previous relevant Colouring In Drag and Drop Browse Button CSS Tutorial is shown below.

Colouring In Drag and Drop Browse Button CSS Tutorial

Colouring In Drag and Drop Browse Button CSS Tutorial

Some HTML features that interface to the underlying operating system, you may have noticed yourself, are more restricted regarding how you can style them, than the usual HTML element catalogue. One which is always coming up, in this regard, for us is …


input type=file browsing (from underlying operating system files) button

The thing is, as an improvement on yesterday’s Colouring In Drag and Drop Mobile Postcard Tutorial we’re butting up against this issue, because we wanted to make it more obvious for our mobile platform users of our Colouring In web application, that the way in to the functionality whereby they can create and share personalized (online) postcards is via them clicking that input type=file browsing button. And so we went looking for advice and came across this excellent link’s advice that got us to set up the scenario

<?php

if (preg_match("/(android|avantgo|blackberry|bolt|boost|cricket|docomo|fone|hiptop|mini|mobi|palm|phone|pie|tablet|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"])) { // thanks to https://stackoverflow.com/questions/4117555/simplest-way-to-detect-a-mobile-device-in-php
$templategame=str_replace('>Game</button>', '>Colouring In <font style=display:none;>Numbers Guessing Game</font> Game <br><font size=1>... drag <select onchange="document.getElementById(' . "'source'" . ').innerHTML=String.fromCodePoint(mwr(this.value));" id=pensel><option value=128396>pen 🖌</option><option value=9999>pencil ✏</option><option value=128397>crayon 🖍</option><option value=8598>totopleft ↖</option><option value=8599>totopright ↗</option>8624><option value=8624>topandright ↰</option><option value=8625>topandleft ↱</option><option value=8626>bottomandright ↲</option><option value=8627>bottomandleft ↳</option><option value=128506>World Reveal 🗺</option><option value=127754>Rivers 🌊</option><option value=127956>Mountain 🏔</option><option value=127966>Waterfall 🏞</option></select> over canvas to colour in</font></button> <span id=dimageb title="Image background settings or some text you want (where ~~ is line feed and {} encased CSS styling (as well as, prefixing {} CSS can be class=YourClass or id=YourId or YourCSSStyleSheet.css type entries, after your wording) can be applied) ... click in pink to open window with some clipart colouring in ideas where Copy Image Address pasted into the Image URL textbox might be interesting for you" onclick="event.preventDefault(); woca=window.open(' . "'https://www.google.com/search?sca_esv=aa70acbcf6aac4c2&sca_upv=1&rlz=1C5CHFA_enAU973AU973&sxsrf=ACQVn0-MqfQVwZOqDS91Pot1E9D39q8Lyg:1712968623365&q=clip+art+linework+suiting+colouring+in&udm=2&source=univ&fir=gh0h5-oZtx___M%252CzQcS3q59Cyx7iM%252C_%253BpuKW1EldlM7spM%252C2l3v9-Tut9pnnM%252C_%253BHIGuP0JItVxEqM%252CRCw7hcXgARi6UM%252C_%253B_jAscIrC7E-1zM%252CIjNu9xj1ZLcxhM%252C_%253B-BKvL80Ovv4lzM%252C9kdy1MVEDMZMEM%252C_%253BAprlfAn4MgndFM%252CXilzPDMvdflqwM%252C_%253BYqCFEOovm8CXXM%252CMz1wIMhhp5At7M%252C_%253BG0zHmO34M00DYM%252C5Af1ulgnwMCIWM%252C_%253Bxzq7L7uZ1EcSyM%252CHPVvluHB2GlLyM%252C_%253BVbPdNDKgb2fUQM%252CGBsWFGjb2mW9sM%252C_&usg=AI4_-kQgjrNM4Kef_p1kQppck71FGlUm6A&biw=1417&bih=746&dpr=1','_blank','left=100,top=200,width=' + eval(-200 + screen.width) + ',height=' + eval(-400 + screen.height))" . ';" style="padding-left:3px;padding-right:3px;background-color:pink;border:1px dotted purple;display:inline;"><iframe onload="jifopen(this);" class="spag" scrolling="no" data-onload="iifopen(this);" id="cbi" frameborder="0" style="width:175px;height:228px;margin-top:-194px;" data-ok="218,-194" data-nmok="200,-178" src="/HTMLCSS/client_browsing.htm?d=332160562686&wording=Allimages%20images%2E%20"></iframe> <input onclick="event.stopPropagation();" id=inurl style=width:420px; onblur="if (mayberesultalready(this.value).trim().length > 0) { if (document.URL.indexOf(String.fromCharCode(63)) == -1) { location.href=document.URL.replace(' . "'.php','.php?imageurl=' + encodeURIComponent(this.value) + '&opacity=' + encodeURIComponent(document.getElementById('opmeter').value) + ''" . '); } else { location.href=document.URL.replace(String.fromCharCode(63), ' . "'?imageurl=' + encodeURIComponent(this.value) + '&opacity=' + encodeURIComponent(document.getElementById('opmeter').value) + '&'" . '); } }" type=url placeholder="Optional linework, postcard, other background image URL or text" value=""></input> <input onclick="event.stopPropagation();" type=number step=0.01 style=display:inline-block; title=Opacity id=opmeter value=1.00 min=0.00 max=1.00></input></span><div id="doverlay" style=display:none;></div><div id="result" style=display:none;></div><div id="resultav" style=display:none;></div><div id="videoag" style=display:none;></div><input type=hidden id="audioname" style=display:none; value=""></input><input type=hidden id="outputname" style=display:none; value=""></input><input type=hidden id="cto" style=display:none; value=""></input><input type=hidden id="thewords" style=display:none; value=""></input><input type=hidden id="saysub" style=display:none; value=""></input>', $templategame); //'', $templategame);
} else {

$templategame=str_replace('>Game</button>', '>Colouring In <font style=display:none;>Numbers Guessing Game</font> Game <br><font size=1>... drag <select onchange="document.getElementById(' . "'source'" . ').innerHTML=String.fromCodePoint(mwr(this.value));" id=pensel><option value=128396>pen 🖌</option><option value=9999>pencil ✏</option><option value=128397>crayon 🖍</option><option value=8598>totopleft ↖</option><option value=8599>totopright ↗</option>8624><option value=8624>topandright ↰</option><option value=8625>topandleft ↱</option><option value=8626>bottomandright ↲</option><option value=8627>bottomandleft ↳</option><option value=128506>World Reveal 🗺</option><option value=127754>Rivers 🌊</option><option value=127956>Mountain 🏔</option><option value=127966>Waterfall 🏞</option></select> over canvas to colour in</font></button> <span id=dimageb title="Image background settings or some text you want (where ~~ is line feed and {} encased CSS styling (as well as, prefixing {} CSS can be class=YourClass or id=YourId or YourCSSStyleSheet.css type entries, after your wording) can be applied) ... click in pink to open window with some clipart colouring in ideas where Copy Image Address pasted into the Image URL textbox might be interesting for you" onclick="event.preventDefault(); woca=window.open(' . "'https://www.google.com/search?sca_esv=aa70acbcf6aac4c2&sca_upv=1&rlz=1C5CHFA_enAU973AU973&sxsrf=ACQVn0-MqfQVwZOqDS91Pot1E9D39q8Lyg:1712968623365&q=clip+art+linework+suiting+colouring+in&udm=2&source=univ&fir=gh0h5-oZtx___M%252CzQcS3q59Cyx7iM%252C_%253BpuKW1EldlM7spM%252C2l3v9-Tut9pnnM%252C_%253BHIGuP0JItVxEqM%252CRCw7hcXgARi6UM%252C_%253B_jAscIrC7E-1zM%252CIjNu9xj1ZLcxhM%252C_%253B-BKvL80Ovv4lzM%252C9kdy1MVEDMZMEM%252C_%253BAprlfAn4MgndFM%252CXilzPDMvdflqwM%252C_%253BYqCFEOovm8CXXM%252CMz1wIMhhp5At7M%252C_%253BG0zHmO34M00DYM%252C5Af1ulgnwMCIWM%252C_%253Bxzq7L7uZ1EcSyM%252CHPVvluHB2GlLyM%252C_%253BVbPdNDKgb2fUQM%252CGBsWFGjb2mW9sM%252C_&usg=AI4_-kQgjrNM4Kef_p1kQppck71FGlUm6A&biw=1417&bih=746&dpr=1','_blank','left=100,top=200,width=' + eval(-200 + screen.width) + ',height=' + eval(-400 + screen.height))" . ';" style="padding-left:3px;padding-right:3px;background-color:pink;border:1px dotted purple;display:inline;"><iframe class="spag" scrolling="no" data-onload="iifopen(this);" id="cbi" frameborder="0" style="width:175px;height:200px;margin-top:-178px;" data-ok="218,-194" data-nmok="200,-178" src="/HTMLCSS/client_browsing.htm?d=332160562686&wording=Allimages%20images%2E%20"></iframe> <input onclick="event.stopPropagation();" id=inurl style=width:420px; onblur="if (mayberesultalready(this.value).trim().length > 0) { if (document.URL.indexOf(String.fromCharCode(63)) == -1) { location.href=document.URL.replace(' . "'.php','.php?imageurl=' + encodeURIComponent(this.value) + '&opacity=' + encodeURIComponent(document.getElementById('opmeter').value) + ''" . '); } else { location.href=document.URL.replace(String.fromCharCode(63), ' . "'?imageurl=' + encodeURIComponent(this.value) + '&opacity=' + encodeURIComponent(document.getElementById('opmeter').value) + '&'" . '); } }" type=url placeholder="Optional linework, postcard, other background image URL or text" value=""></input> <input onclick="event.stopPropagation();" type=number step=0.01 style=display:inline-block; title=Opacity id=opmeter value=1.00 min=0.00 max=1.00></input></span><div id="doverlay" style=display:none;></div><div id="result" style=display:none;></div><div id="resultav" style=display:none;></div><div id="videoag" style=display:none;></div><input type=hidden id="audioname" style=display:none; value=""></input><input type=hidden id="outputname" style=display:none; value=""></input><input type=hidden id="cto" style=display:none; value=""></input><input type=hidden id="thewords" style=display:none; value=""></input><input type=hidden id="saysub" style=display:none; value=""></input>', $templategame); //'', $templategame);
}

?>

… for mobile platforms, where, on opening the HTML iframe linking to this relevant input type=file browsing button we restyle according to …


var cbaconto=null;

function jifopen(iois) {
if (iois != null) {
cbaconto = (iois.contentWindow || iois.contentDocument);
if (cbaconto.document) { cbaconto = cbaconto.document; }
if (cbaconto != null) {
// Thanks to https://www.viget.com/articles/styling-native-file-upload-input-field/
setInterval(function() {
cbaconto.getElementById('apostcard').innerHTML+='<sty' + 'le> input[type="file"]::after { content:' + "'\\002709 Postcard \\002709'; } </sty" + 'le>';
setTimeout(function() {
cbaconto.getElementById('apostcard').innerHTML+='<sty' + 'le> input[type="file"]::after { content:' + "'\\01F4F7 Take Photo \\01F4F7'; } </sty" + 'le>';
}, 5000);
}, 10000);
}
}
}

… creating a small emoji assisted animation informing of Postcard “Take Photo” possibilities regarding Postcard creation ideas, via a click of this input type=file browsing button.

Codewise this needed …


Previous relevant Colouring In Drag and Drop Mobile Postcard Tutorial is shown below.

Colouring In Drag and Drop Mobile Postcard Tutorial

Colouring In Drag and Drop Mobile Postcard Tutorial

Yesterday’s Colouring In Drag and Drop Postcard Tutorial mentioned two issues with its Postcard creation functionalities that needed further attention …

We have more work to do regarding data limits (even with hashtagging) using mobile platforms and the Take Photo idea, and we have some text positioning to fix also …

… and today we look into that a bit more.

Regarding “We have more work to do regarding data limits (even with hashtagging) using mobile platforms” we were finding the “Take Photo” iOS Camera app functionality was producing images of more than 3000×4000 and as such, though amazingly it can still work in non-mobile, we were not surprised it didn’t work when shaping to create the mainly hashtagged email link required to share a Postcard with an emailee (ie. email recipient). So we did some pruning


var lesserinurl='';

function checkspag() {
if (navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i) && document.getElementById('result').innerHTML.trim() != '' && lesserinurl == '' && document.getElementById('result').innerHTML.indexOf('data:') == 0) {
newimg=document.createElement('img');
newimg.onload = function() {
// draw the image onto the canvas
//alert(11);
newcanvas=document.getElementById('mymobilecanvas'); //document.createElement('canvas');
//alert(111);
if (newimg.width > 800) {
newcanvas.width=800;
newcanvas.height=Math.round(newimg.height * 800 / newimg.width);
//alert('Wh=' + newcanvas.width + 'x' + newcanvas.height);
newcanvas.getContext('2d').drawImage(newimg, 0, 0, newimg.width, newimg.height, 0, 0, newcanvas.width, newcanvas.height);
} else {
newcanvas.width=newimg.width;
//alert('' + newimg.width + 'x' + newimg.height);
newcanvas.height=newimg.height;
//alert('wh=' + newcanvas.width + 'x' + newcanvas.height);
newcanvas.getContext('2d').drawImage(newimg, 0, 0);
}
lesserinurl=newcanvas.toDataURL('image/jpeg', 0.1);
document.getElementById('result').innerHTML=lesserinurl;
//document.getElementById('inurl').value=lesserinurl;
//alert(lesserinurl);
//document.getElementById('inurl').blur();
}
newimg.src = document.getElementById('result').innerHTML;
setTimeout(checkspag, 5000);
} else
if (document.getElementById('result').innerHTML.trim() != '' && multistyle == '') {
imdu=document.getElementById('result').innerHTML.trim();
document.getElementById('result').innerHTML='';
document.getElementById('cbi').src='/HTMLCSS/client_browsing.htm?d=' + Math.floor(Math.random() * 1987867564) + '&wording=Allimages%20images%2E%20';
//alert(' #mytable { background:linear-gradient(rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + '),rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + ')),URL(' + imdu.replace(/\ /g,'+').substring(0,20) + '); background-repeat:no-repeat; background-size:contain; } ');
if (document.getElementById('ddstyle')) {
if (document.getElementById('ddstyle').innerHTML.indexOf(imdu) == -1) {
document.getElementById('ddstyle').innerHTML=' #mytable { background-image:linear-gradient(rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + '),rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + ')),URL(' + imdu.replace(/\ /g,'+') + '); background-repeat:no-repeat; background-size:contain; } ';
}
} else {
if (document.getElementById('dstyle').innerHTML.indexOf(imdu) == -1) {
//alert('Here');
document.getElementById('dstyle').innerHTML+=' #mytable { background-image:linear-gradient(rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + '),rgba(255,255,255,' + eval(1.0 - document.getElementById('opmeter').value).toPrecision(2) + ')),URL(' + imdu.replace(/\ /g,'+') + '); background-repeat:no-repeat; background-size:contain; } ';
}
}
setTimeout(checkspag, 5000);
} else {
setTimeout(checkspag, 5000);
}
}

… using the great HTML5 canvas element invention, and found it could send such a pruned down postcard, though we are not ruling out future tweaks that may add back some resolution and size into the future. We’ll see.

And regarding “we have some text positioning to fix”, our hunch about the offset needed to fix being the (opposite of the) amount to the top of the imagery in a normal Colouring In webpage, panned out


var postcard=false;
var origmytablerect=null;

setTimeout(function(){
origmytablerect=document.getElementById('mytable').getBoundingClientRect();
console.log('356:' + origmytablerect.top);
var woois=window.open('', '_blank', 'top=50,left=50,width=800,height=800');
if (1 == 1) {
woois.document.write('<html>' + document.head.outerHTML.replace('postc' + 'ard=false', 'postc' + 'ard=true') + document.body.outerHTML + '</html>');
//origmytablerect=woois.document.getElementById('mytable').getBoundingClientRect();
//console.log('56:' + origmytablerect.top);
if (eval('' + origmytablerect.top) > 0) {
var wasthetop=0, thespans=woois.document.getElementsByTagName('span');
for (var iispans=0; iispans<thespans.length; iispans++) {
if (thespans[iispans].outerHTML.indexOf('absolute;') != -1 && thespans[iispans].outerHTML.indexOf('top:') != -1) {
console.log('10:' + thespans[iispans].outerHTML);
wasthetop=eval('' + thespans[iispans].outerHTML.split('top:')[1].split(';')[0].replace('px','').trim());
wasthetop-=eval('' + origmytablerect.top);
thespans[iispans].style.top='' + wasthetop + 'px';
}
}
}

woois.document.getElementById('mytable').style.position='fixed';
woois.document.getElementById('mytable').style.left='0px';
woois.document.getElementById('mytable').style.top='0px';
woois.document.getElementById('mytable').style.zIndex='23';
woois.document.getElementsByTagName('h1')[0].style.display='none';
woois.document.getElementsByTagName('h3')[0].style.display='none';
woois.document.getElementsByTagName('h3')[1].style.display='none';
woois.document.getElementsByTagName('h4')[0].style.display='none';
woois.document.getElementById('spancb').style.display='none';
woois.document.getElementById('dsource').style.display='none';
} else {
//woois.document.write('<html>' + document.head.outerHTML + document.body.outerHTML.replace('<div id="ta' + 'rget">', '<div id="ta' + 'rget" style="position:fixed;top:0px;left:0px;z-index:23;">') + '</html>');
woois.document.write('<html>' + document.head.outerHTML + document.body.outerHTML.replace(' cellspacing="0" sty' + 'le="', ' cellspacing="0" sty' + 'le="position:fixed;top:0px;left:0px;z-index:23;') + '</html>');
//woois.document.write('<html>' + document.head.outerHTML + document.body.outerHTML.replace(' cellspacing="0" sty' + 'le="', ' cellspacing="0" sty' + 'le="margin-top:-150px;z-index:23;') + '</html>');

woois.document.getElementsByTagName('h1')[0].style.display='none';
woois.document.getElementsByTagName('h3')[0].style.display='none';
woois.document.getElementsByTagName('h3')[1].style.display='none';
woois.document.getElementsByTagName('h4')[0].style.display='none';
woois.document.getElementById('spancb').style.display='none';
woois.document.getElementById('dsource').style.display='none';
}
}, 15000);

Only a changed experimental_drag_and_drop.htm Experimental Drag and Drop clientside HTML and Javascript basis was needed to help out our Colouring In web application’s Postcard production ideas.

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Posted in eLearning, Event-Driven Programming, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Canvas DrawImage First Parameter Primer Tutorial

Canvas DrawImage First Parameter Primer Tutorial

Canvas DrawImage First Parameter Primer Tutorial

Some time ago we presented a short tutorial about a great online product addressing a big area of interest to online users … online meetings. We showcased the great GoToMeeting, with GoToMeeting Primer Tutorial, and we remember using it to good effect among …

  • installing software remotely
  • diagnosing software and hardware issues remotely
  • discussing issues remoting
  • client liaisson remotely

… at a job involving EDI solutions with SAP Business One and Accpac. But that is just the subject matter basis here. Today we really want to use some media from that subject matter basis and use it’s video media as the first argument to the wonderful, the stupendous Canvas drawImage() Method, specifically its fascinating first parameter

Syntax
Position the image on the canvas:

context.drawImage(img, x, y)
Position the image on the canvas, and specify width and height of the image:

context.drawImage(img, x, y, width, height)
Clip the image and position the clipped part on the canvas:

context.drawImage(img, sx, sy, swidth, sheight, x, y, width, height)

Don’t be fooled! It is a method offering, thanks, so much more that just an

el interface intrinsicHeight(el) intrinsicWidth(el)
HTMLImageElement el.naturalWidth el.naturalHeight
SVGImageElement el.[… special case] el.[… special case]
HTMLVideoElement el.videoWidth el.videoHeight
HTMLCanvasElement el.width el.height
ImageBitmap el.width el.height
OffscreenCanvas el.width el.height

… but whaaaaatttttt?! What happens here assigning a video object as a first parameter to the canvas (context)’s drawImage method? It takes a snapshot image of the slide of the playing (and if not, the first image of that) video! That means, couch that in a codeline like …


setInterval(function(){ ctx.drawImage(ovid, 800, 0); }, 100);

… at the right time, and you can be playing a video into the canvas! Yay!!! Actually, we’ve done this before, and, call us innocents if you like, but this gave us the same thrill then, thanks to all the online contributors regarding heads up ideas here.

But we are “value adding” today. It hadn’t occurred to us that we could do this video to the right of the canvas and dedicate the left side to captions, and that over there, there was enough room to show the “whole blurb” … and nothing but the blurb, and that if we use …

  • HTML video element attribute … autostart=true
  • HTML video element attribute … autoplay=true
  • HTML video element attribute … loop=true

… even if they do not work right from the document.body onload event time, once the video play button is clicked, we could do without the actual video from then on, perhaps (we’ve allowed you to resurrect the video display, and have more work into the future, maybe, regarding the repercussions of this … we’ll see?!).

What form of caption source did we use? We happened to have a “.srt” format WebVTT file pertinent to the GoToMeeting video hanging about, and so we shoved it into the innards of an HTML textarea element, and coded it from there …


<html>
<head>
<title>SVG to Canvas - RJM Programming - May, 2024 ... thanks to https://jsfiddle.net/Na6X5/</title>
<style>
canvas {
border: 1px solid gray;
}
</style>
<script type='text/javascript'>
var divstrc='';
var timings=[];
var times=[];
var tstimes=[];
var blurbs=[];
var cf = "12px Verdana";
var thisy=20, thisi=0, thisc=0;
var can=null, ctx=null;
var collist=['black','blue','purple','magenta','darkred','darkgreen'];
var lenc=eval('' + collist.length);
var oppmode='none';

function tanal(intr) {
var pts=intr.split(':');
console.log(intr);
tstimes.push(eval(eval(pts[0] * 60 * 60 * 1000) + eval(pts[1] * 60 * 1000) + eval(pts[2] * 1000)));
return intr;
}

function onl() {
can = document.getElementById('canvas1');
ctx = can.getContext('2d');

var svg = document.getElementById('simage');
var oimg = document.getElementById('simg');
var ovid = document.getElementById('myvd');

divstrc=document.getElementById('divsrt').value;
timings=divstrc.split(' --> ');
//alert(timings.length);
times.push(tanal(timings[0].slice(-13).trim()));
for (var ii=1; ii<timings.length; ii++) {
if (1 == 2) { times.push(tanal(timings[ii].substring(0,13).trim())); }
if (eval(1 + ii) != eval('' + timings.length)) {
times.push(tanal(timings[ii].slice(-13).trim()));
} else {
times.push(tanal(timings[ii].substring(0,13).trim()));
}
blurbs.push(timings[ii].split(String.fromCharCode(10))[1]);
}

console.log(blurbs);
console.log(tstimes);

var img = new Image();
img.onload = function() {
//ctx.drawImage(svg, 0, 0);
//ctx.drawImage(img, 200, 0);
//ctx.drawImage(oimg, 400, 0);
//ovid.play();
setInterval(function(){ ctx.drawImage(ovid, 800, 0); }, 100);
}
//img.src = "http://upload.wikimedia.org/wikipedia/commons/d/d2/Svg_example_square.svg";
//img.src = "/hexagon.svg";
//img.src = "/homecircle.svg";
img.src=oimg.src;
}

function dotext() {
if (eval(1 + thisi) >= eval('' + tstimes.length)) {
thisc++;
if (thisc >= eval('' + collist.length)) {
collist.push(collist[eval(thisc % lenc)]);
}
return loadsrt('');
}
setTimeout(dotext, eval(tstimes[eval(1 + thisi)] - tstimes[eval(0 + thisi)]));
ctx.font = cf;
ctx.strokeStyle=collist[thisc];
ctx.strokeText(blurbs[thisi],20,thisy);
thisy+=15;
thisi++;
}

function loadsrt(dsp) {
thisi=0;
thisy=20;
setTimeout(dotext, tstimes[0]);
if (dsp != '') {
document.getElementById('mysummary').innerHTML='Please click to toggle video display ...';
}
return dsp;
}
</script>
</head>
<body onload="onl();">
<canvas style='background-color:yellow;' id="canvas1" width="1400" height="400"></canvas>

<div id=previd style="display:none;">
<svg id="mySVG" xmlns="http://www.w3.org/2000/svg" version="1.1">
<rect width="150" height="150" fill="rgb(0, 255, 0)" stroke-width="1" stroke="rgb(0, 0, 0)"/>
</svg>

<svg id="mySVGimage" width="300" height="300" viewBox="0 0 300 300" xmlns="http://www.w3.org/2000/svg" version="1.1">
<image id=simage href="/hexagon.svg" height="300" width="300" />
</svg>

<img id=simg src='data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Layer_1" x="0px" y="0px" viewBox="0 0 100 100" enable-background="new 0 0 100 100" xml:space="preserve" height="100px" width="100px">
<g>
<path d="M28.1,36.6c4.6,1.9,12.2,1.6,20.9,1.1c8.9-0.4,19-0.9,28.9,0.9c6.3,1.2,11.9,3.1,16.8,6c-1.5-12.2-7.9-23.7-18.6-31.3 c-4.9-0.2-9.9,0.3-14.8,1.4C47.8,17.9,36.2,25.6,28.1,36.6z"/>
<path d="M70.3,9.8C57.5,3.4,42.8,3.6,30.5,9.5c-3,6-8.4,19.6-5.3,24.9c8.6-11.7,20.9-19.8,35.2-23.1C63.7,10.5,67,10,70.3,9.8z"/>
<path d="M16.5,51.3c0.6-1.7,1.2-3.4,2-5.1c-3.8-3.4-7.5-7-11-10.8c-2.1,6.1-2.8,12.5-2.3,18.7C9.6,51.1,13.4,50.2,16.5,51.3z"/>
<path d="M9,31.6c3.5,3.9,7.2,7.6,11.1,11.1c0.8-1.6,1.7-3.1,2.6-4.6c0.1-0.2,0.3-0.4,0.4-0.6c-2.9-3.3-3.1-9.2-0.6-17.6 c0.8-2.7,1.8-5.3,2.7-7.4c-5.2,3.4-9.8,8-13.3,13.7C10.8,27.9,9.8,29.7,9,31.6z"/>
<path d="M15.4,54.7c-2.6-1-6.1,0.7-9.7,3.4c1.2,6.6,3.9,13,8,18.5C13,69.3,13.5,61.8,15.4,54.7z"/>
<path d="M39.8,57.6C54.3,66.7,70,73,86.5,76.4c0.6-0.8,1.1-1.6,1.7-2.5c4.8-7.7,7-16.3,6.8-24.8c-13.8-9.3-31.3-8.4-45.8-7.7 c-9.5,0.5-17.8,0.9-23.2-1.7c-0.1,0.1-0.2,0.3-0.3,0.4c-1,1.7-2,3.4-2.9,5.1C28.2,49.7,33.8,53.9,39.8,57.6z"/>
<path d="M26.2,88.2c3.3,2,6.7,3.6,10.2,4.7c-3.5-6.2-6.3-12.6-8.8-18.5c-3.1-7.2-5.8-13.5-9-17.2c-1.9,8-2,16.4-0.3,24.7 C20.6,84.2,23.2,86.3,26.2,88.2z"/>
<path d="M30.9,73c2.9,6.8,6.1,14.4,10.5,21.2c15.6,3,32-2.3,42.6-14.6C67.7,76,52.2,69.6,37.9,60.7C32,57,26.5,53,21.3,48.6 c-0.6,1.5-1.2,3-1.7,4.6C24.1,57.1,27.3,64.5,30.9,73z"/>
</g>
</svg>'></img>
</div>

<details onclick=" document.getElementById('myvd').style.display=oppmode; if (oppmode == 'block') { oppmode='none'; } else { oppmode='block'; }" open><summary id=mysummary>Please click play button below ...</summary>
<video onplay="this.style.display=loadsrt('none');" id=myvd autoplay=true autostart=true loop=true controls><source src='/Mac/GoToMeeting/GoToMeeting.m4v' type='video/mp4'></source></video>
<div id=divhs style=display:inline-block;vertical-align:top;>
<h1>Video and Captions to Canvas</h1>
<h3>RJM Programming - May, 2024</h3>
<h4>Thanks to https://jsfiddle.net/Na6X5/</h4>
</div>
</details>

<textarea id=divsrt style="display:none;">
WEBVTT FILE

1
00:00:00.100 --> 00:00:01.000 D:vertical A:start
Welcome to our GoTo Meeting tutorial ...
{
"title": "GoTo Meeting tutorial image 1 of 5",
"description": "Welcome to our GoTo Meeting tutorial",
"src": "gm1.jpg",
"href": "http://www.rjmprogramming.com.au/PHP/videos"
}

2
00:00:01.000 --> 00:00:04.000
... we've installed GoTo Meeting and started it up. We have done the invite so we will be the "Presenter" ...

3
00:00:04.000 --> 00:00:06.000
... we click "Show My Screen" ...
{
"title": "GoTo Meeting tutorial image 2 of 5",
"description": "Show My Screen",
"src": "gm2.jpg",
"href": "http://www.rjmprogramming.com.au/PHP/videos"
}

4
00:00:06.000 --> 00:00:16.000
... which is enabled because we are the "Presenter". Now lets ready other things ready to make a connection ...

5
00:00:16.000 --> 00:00:22.000
... we click "Show My Webcam" and start Connecting ...
{
"title": "GoTo Meeting tutorial image 3 of 5",
"description": "Show My Webcam",
"src": "gm3.jpg",
"href": "http://www.rjmprogramming.com.au/PHP/videos"
}

6
00:00:22.000 --> 00:00:24.000
... the GoTo Viewer appears showing you a view of the person you are meeting ...

7
00:00:24.000 --> 00:00:26.000
... we have "lift off" ...
{
"title": "GoTo Meeting tutorial image 4 of 5",
"description": "Lift Off",
"src": "gm4.jpg",
"href": "http://www.rjmprogramming.com.au/PHP/videos"
}

8
00:00:26.000 --> 00:00:28.000
... lo and behold, we've called ourself ...

9
00:00:28.000 --> 00:00:32.000
... have a look at us looking at us ...

10
00:00:32.000 --> 00:00:52.000
... but don't let it blow your mind?!
{
"title": "GoTo Meeting tutorial image 5 of 5",
"description": "Don't blow your mind",
"src": "gm5.jpg",
"href": "http://www.rjmprogramming.com.au/PHP/videos"
}

11
00:00:52.000 --> 00:01:34.000
Leaving the GoTo Meeting now. See you again soon.

</textarea>

</body>
</html>

Yes, we started the day with a different idea, and end up where we are at with our first draft proof of concept Video to Canvas web application incarnation … again.


Previous relevant GoToMeeting Primer Tutorial is shown below.

GoToMeeting Primer Tutorial

GoToMeeting Primer Tutorial

Here is a tutorial that introduces you to GoToMeeting. GoToMeeting is a great user-friendly video conferencing software by Citrix.

For simple scenarios I’ve always felt comfortable with GoToMeeting for that video conferencing functionality, or for how I usually used it, remotely testing, troubleshooting and/or installing software on remote client sites. Other choices for all Windows scenarios, here are Remote Desktop, and for mixed scenarios, VNC.

GoToMeeting can work with a phone connection or by using the Microphone and Speakers at both ends of the connection. You can host the meeting or join the meeting, share your keyboard or mouse, share your display via a shared webcam, as necessary, meet straight away, or schedule it, or email an invitation … all in all there is a lot of great functionality. Like with Skype, audio and visual can be considered separate … from our tutorial session here is some audio, and here is some visual (ie. video).

Other such meeting ideas can be accessed via Skype, or WebEx Web Conferencing. All these are great ideas that can save companies lots of money on overseas trips!

Link to GoToMeeting “spiritual home” at GoToMeeting, which is owned by Citrix.

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Posted in eLearning, Event-Driven Programming, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Colour Coded Mobile Form With Onsubmit Captcha Tutorial

Colour Coded Mobile Form With Onsubmit Captcha Tutorial

Colour Coded Mobile Form With Onsubmit Captcha Tutorial

Yes, am sure lots of you could have told me about yesterday’s Colour Coded Form With Onsubmit Captcha Tutorial

But what about mobile?

Well, it’s your turn to say …

Told you so.

It’s the scenario whereby there is an onsubmit event logic defined and the user gets any chance at the “keyboard”, if they use the “go” button (at least on iOS) that was circumventing the Captcha logic we’d introduced. In the remedy, we got so very close to totally using, for the first time, the relatively recent …

… but what we found better (though inert was good for about 71/2 out of 8 scenarios (and with all the mobile scenarios)) was to use, occasionally, the rather crude …

  1. if you want to discourage keyboard usage ahead of arranging the Captcha image and span … for whatever reason …
  2. go, as soon as possible …

    [formElement].style.visibility='hidden';

    … until …
  3. the Captcha image and span have been appended to the [formElement].innerHTML (perhaps display:block; or perhaps display:none;) and any overlaying input type=button applied … then …
  4. as required, go …

    [formElement].style.visibility='visible';

… in a further changed colour_code_captcha.js external Javascript helping out colour_code_captcha.htm testing HTML with onsubmit already defined (or below) or testing HTML with no onsubmit already defined (or below).


Previous relevant Colour Coded Form With Onsubmit Captcha Tutorial is shown below.

Colour Coded Form With Onsubmit Captcha Tutorial

Colour Coded Form With Onsubmit Captcha Tutorial

We suspected there would be difficulties when, elaborating on yesterday’s Colour Coded Form Captcha Tutorial‘s start …

  • dynamically adding Captcha Colour Code logic (via the use of external Javascript) to an HTML webpage form … which had no form onsubmit event defined … when today we tested that logic for a form with existant onsubmit event logic (and needed) …
  • new dynamically adding Captcha Colour Code logic (via the use of external Javascript (still via the use of external Javascript

    <script type='text/javascript' src='//www.rjmprogramming.com.au/colour_code_captcha.js' defer></script>

    ) for an HTML webpage form … which had an existant form onsubmit event defined

Recreating onsubmit logic panned out to be the wrong approach, and the KISS (“keep it simple signorina”) approach much more the go. We ended up …

  • recognising the existence of an onsubmit event
  • show the Colour Coded Captcha image and “span” question near the document.body onload event … at the same time as …
  • overlay the input type=submit (remembering from yesterday, that we arrange for this to exist) button with an input type=button

… to start with. If the user solves the Captcha that input type=button is made to disappear, allowing the true original input type=submit be used as per the original webpage design …


function onsubmitreturn(arguin) {
var farris=[], vscanvasoh='', ifarris=0, newcimgis=null;
if (imgcaptcha && submitcaptcha && spancaptcha && canvascaptcha && formelemofinterest) {
if (('' + arguin) != 'frombutton' || 8 == 8) {
if (('' + arguin).replace('null','').replace('undefined','') == '') {
arguin=imgcaptcha.getAttribute('data-clickedcol');
}
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
//alert('' + arguin + ' vs ' + mcollist[eval('' + formelemofinterest.getAttribute('data-need'))]);
if (('' + arguin).replace('#','').toLowerCase() == mcollist[eval('' + formelemofinterest.getAttribute('data-need'))].replace('#','').toLowerCase()) {
//alert('yay');
if (document.getElementById('myoverlaybo')) {
document.getElementById('myoverlaybo').style.display='none';
}
formelemofinterest.submit();
return true;
} else {
return false;
}
} else {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
return false;
}
} //else {
//if (!imgcaptcha) { alert('no img'); }
//if (!spancaptcha) { alert('no span'); }
//if (!canvascaptcha) { alert('no canvas'); }
//if (!formelemofinterest) { alert('no form'); }
//}
if (!canvascaptcha) {
if (document.getElementById('canvascaptcha')) {
canvascaptcha=document.getElementById('canvascaptcha');
}
if (!formelemofinterest) {
if (('' + arguin).replace('null','').replace('undefined','') == '') {
farris=document.getElementsByTagName('form');
if (eval('' + farris.length) > 0) {
formelemofinterest=farris[0];
if (formelemofinterest.innerHTML.indexOf('<canvas') != -1) {
vscanvasoh='<canvas' + formelemofinterest.innerHTML.split('<canvas')[0].split('>')[0] + '>';
farris=document.getElementsByTagName('canvas');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
canvascaptcha=farris[ifarris];
if (canvascaptcha.outerHTML.indexOf(' id=') == -1) {
canvascaptcha.id='canvascaptcha';
}
}
}
}
}
} else if (('' + arguin.innerHTML).replace('null','').replace('undefined','') != '') {
formelemofinterest=arguin;
if (formelemofinterest.innerHTML.indexOf('<canvas') != -1) {
vscanvasoh='<canvas' + formelemofinterest.innerHTML.split('<canvas')[0].split('>')[0] + '>';
farris=document.getElementsByTagName('canvas');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
canvascaptcha=farris[ifarris];
if (canvascaptcha.outerHTML.indexOf(' id=') == -1) {
canvascaptcha.id='canvascaptcha';
}
}
}
}
}
}
}

if (!formelemofinterest) { return false; }

if (!canvascaptcha) {
formelemofinterest.innerHTML+='<canvas id=canvascaptcha style=display:none;></canvas>';
canvascaptcha=document.getElementById('canvascaptcha');
}
if (!canvascaptcha) { return false; }
if (('' + canvascaptcha.getAttribute('data-initialized')).replace('null','').replace('undefined','') == '') {
newcimgis=new Image();
newcimgis.onload=function(e){
var osbit='';
iandcwidth=newcimgis.width;
iandcheight=newcimgis.height;
if (iandcwidth > 800) {
canvascaptcha.width=iandcwidth;
canvascaptcha.height=iandcheight;
} else {
canvascaptcha.width=800;
canvascaptcha.height=Math.round(newcimgis.height * 800 / newcimgis.width);
}
canvascaptchacontext=canvascaptcha.getContext('2d');
canvascaptchacontext.drawImage(newcimgis, 0, 0, newcimgis.width, newcimgis.height, 0, 0, canvascaptcha.width, canvascaptcha.height);
canvascaptcha.setAttribute('data-initialized', 'y');
mcolrand=eval(1 + Math.floor(Math.random() * eval(-1 + eval('' + mcollist.length))));
if (formelemofinterest.innerHTML.replace(/\"/g,'').replace(/\'/g,'').indexOf(' type=submit') == -1) {
formelemofinterest.innerHTML+='<br><input id=subcaptcha type=submit style=display:block; value=Submit></input><br><br><div id=cstuff><span id=spancaptcha style="display:none;background-color:' + mcollist[mcolrand] + ';">Click below on same colour as background of this text.<br>On success image disappears and you can retry.</span><br><br><img style=display:none; onclick=checkcaptcha(event); id=imgcaptcha data-clickedcol="#000000" width=' + canvascaptcha.width + ' height=' + canvascaptcha.height + ' src="' + canvascaptcha.toDataURL('image/png') + '"></img></div>';
submitcaptcha=document.getElementById('subcaptcha');
} else {
if (formelemofinterest.innerHTML.indexOf(' type="submit"') != -1) {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(' type="submit"')[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(' type="submit"')[0].split('<input').length)] + ' type="submit"' + formelemofinterest.innerHTML.split(' type="submit"')[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
} else if (formelemofinterest.innerHTML.indexOf(" type='submit'") != -1) {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(" type='submit'")[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(" type='submit'")[0].split('<input').length)] + " type='submit'" + formelemofinterest.innerHTML.split(" type='submit'")[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
} else {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(" type=submit")[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(" type=submit")[0].split('<input').length)] + " type=submit" + formelemofinterest.innerHTML.split(" type=submit")[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
formelemofinterest.innerHTML+='<br><br><div id=cstuff><span id=spancaptcha style="display:none;background-color:' + mcollist[mcolrand] + ';">Click below on same colour as background of this text.<br>On success image disappears and you can retry.</span><br><br><img style=display:none; onclick=checkcaptcha(event); id=imgcaptcha data-clickedcol="#000000" width=' + canvascaptcha.width + ' height=' + canvascaptcha.height + ' src="' + canvascaptcha.toDataURL('image/png') + '"></img></div>';
}
formelemofinterest.setAttribute('data-need', '' + mcolrand);
imgcaptcha=document.getElementById('imgcaptcha');
spancaptcha=document.getElementById('spancaptcha');

if (formelemofinterest.outerHTML.indexOf(' onsubmit=') == -1) {
formelemofinterest.onsubmit=function(){ return realonsubmitreturn(''); };
} else if (formelemofinterest.outerHTML.indexOf(' onsubmit="') != -1) {
osbit=formelemofinterest.outerHTML.split(' onsubmit="')[1].split('"')[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha || 1== 1) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('1:' + submitcaptcha.id);
overlaybrect=document.getElementById('mysub').getBoundingClientRect();
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo onclick="spancaptcha.style.display=' + "'inline'" + '; imgcaptcha.style.display=' + "'block'" + '; alert(1987); this.style.display=' + "'none'" + '; "></input>';
overlaybo=document.getElementById('myverlaybo');
//submitcaptcha.onmouseover=function(event){ document.title=('' + event.target.id); return realonsubmitreturn(''); };
//alert('11:' + submitcaptcha.id);
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
//alert('111:' + submitcaptcha.id + ' ' + submitcaptcha.outerHTML);
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
} else if (formelemofinterest.outerHTML.indexOf(" onsubmit='") != -1) {
osbit=formelemofinterest.outerHTML.split(" onsubmit='")[1].split("'")[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha && overlaybrect == null) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('' + submitcaptcha.id);
submitcaptcha.onmousedown=function(event){ return realonsubmitreturn(''); };
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
} else if (formelemofinterest.outerHTML.indexOf(' onsubmit=') != -1) {
osbit=formelemofinterest.outerHTML.split(' onsubmit=')[1].split(' ')[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha || 2 == 2) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('3:' + submitcaptcha.id);
submitcaptcha.onmousedown=function(event){ return realonsubmitreturn(''); };
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
}

};
setTimeout(function(){
newcimgis.src='data:image/webp;base64,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';
}, 2000);
}

return false;
}

… in a changed colour_code_captcha.js external Javascript helping out the changed colour_code_captcha.htm testing HTML with onsubmit already defined


Previous relevant Colour Coded Form Captcha Tutorial is shown below.

Colour Coded Form Captcha Tutorial

Colour Coded Form Captcha Tutorial

Are you human?

This is not such a silly question, in the online world. There are ways to access software with no real human intervention among …

  • legitimately
  • usefully
  • unintendedly
  • maliciously

… and if you design a web application looking after details entered by a user, often you want to ensure the processing is being done by a real user, in the first two ways.

Years ago, with this in mind, came CAPTCHA logic …

A CAPTCHA (/ˈkæp.tʃə/ KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

Those ones with the segmented images and you are asked to click in all parts containing a bike, for instance, yours truly finds very tricky. Yes, today’s idea from us is a lot simpler. It just involves …

  • colour coding
  • a Dutch artistic genius … Piet Mondrian
  • Pixabay‘s access to that genius … thanks, all concerned …
  • a love of simplicity (and mostly, primary colours) …
  • HTML5 canvas element … especially it’s method …
  • getImageData() method

… allowing us to scrutinize image pixel colours at a clicked position. And just in case users are colour blind, we diss any colour names and use background comparison question reasoning in the code.

As seemingly silly as this sounds, it’s insertion into an HTML webpage form element’s onsubmit event logic (and we found out, we needed to force an input type=submit button, if not there), is an extra step to deter processes not being run by a real user accessing the form.

Today, we’ve supplied a really simple parent overseer colour_code_captcha.html example usage (that just writes a personalized (but not gift wrapped, alas) welcome message near the top of the webpage) …


<html>
<head>
<script type='text/javascript' src='//www.rjmprogramming.com.au/colour_code_captcha.js' defer></script>
<script type='text/javascript'>
var fname=location.search.split('fname=')[1] ? decodeURIComponent(location.search.split('fname=')[1].split('&')[0]) : "";
var lname=location.search.split('lname=')[1] ? decodeURIComponent(location.search.split('lname=')[1].split('&')[0]) : "";
</script>
</head>
<body onload="if ((fname + lname).trim() != '' && document.referrer.indexOf('/colour_code_captcha.') != -1) { document.getElementById('welcome').innerHTML='<h2>Welcome to ' + fname + ' ' + lname + ' at ' + ('' + new Date()) + ' ...</h2>'; }">
<div id=welcome></div>
<form data-onsubmit="return onsubmitreturn('');" action='./colour_code_captcha.html' method=GET>
<input style=text placeholder="First name" name=fname type=text></input><br>
<input style=text placeholder="Last name" name=lname type=text></input><br>
<br><input id=mysub type=submit value="Say hello ..."></input>
</form>
</body>
</html>

… of that one external Javascript script tool doing just about all the CAPTCHA work insinuated into the parent webpage’s first such HTML form element found, via colour_code_captcha.js first draft external Javascript you can also try below …

If this was interesting you may be interested in this too.


If this was interesting you may be interested in this too.


If this was interesting you may be interested in this too.

Posted in eLearning, Event-Driven Programming, iOS, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Colour Coded Form With Onsubmit Captcha Tutorial

Colour Coded Form With Onsubmit Captcha Tutorial

Colour Coded Form With Onsubmit Captcha Tutorial

We suspected there would be difficulties when, elaborating on yesterday’s Colour Coded Form Captcha Tutorial‘s start …

  • dynamically adding Captcha Colour Code logic (via the use of external Javascript) to an HTML webpage form … which had no form onsubmit event defined … when today we tested that logic for a form with existant onsubmit event logic (and needed) …
  • new dynamically adding Captcha Colour Code logic (via the use of external Javascript (still via the use of external Javascript

    <script type='text/javascript' src='//www.rjmprogramming.com.au/colour_code_captcha.js' defer></script>

    ) for an HTML webpage form … which had an existant form onsubmit event defined

Recreating onsubmit logic panned out to be the wrong approach, and the KISS (“keep it simple signorina”) approach much more the go. We ended up …

  • recognising the existence of an onsubmit event
  • show the Colour Coded Captcha image and “span” question near the document.body onload event … at the same time as …
  • overlay the input type=submit (remembering from yesterday, that we arrange for this to exist) button with an input type=button

… to start with. If the user solves the Captcha that input type=button is made to disappear, allowing the true original input type=submit be used as per the original webpage design …


function onsubmitreturn(arguin) {
var farris=[], vscanvasoh='', ifarris=0, newcimgis=null;
if (imgcaptcha && submitcaptcha && spancaptcha && canvascaptcha && formelemofinterest) {
if (('' + arguin) != 'frombutton' || 8 == 8) {
if (('' + arguin).replace('null','').replace('undefined','') == '') {
arguin=imgcaptcha.getAttribute('data-clickedcol');
}
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
//alert('' + arguin + ' vs ' + mcollist[eval('' + formelemofinterest.getAttribute('data-need'))]);
if (('' + arguin).replace('#','').toLowerCase() == mcollist[eval('' + formelemofinterest.getAttribute('data-need'))].replace('#','').toLowerCase()) {
//alert('yay');
if (document.getElementById('myoverlaybo')) {
document.getElementById('myoverlaybo').style.display='none';
}
formelemofinterest.submit();
return true;
} else {
return false;
}
} else {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
return false;
}
} //else {
//if (!imgcaptcha) { alert('no img'); }
//if (!spancaptcha) { alert('no span'); }
//if (!canvascaptcha) { alert('no canvas'); }
//if (!formelemofinterest) { alert('no form'); }
//}
if (!canvascaptcha) {
if (document.getElementById('canvascaptcha')) {
canvascaptcha=document.getElementById('canvascaptcha');
}
if (!formelemofinterest) {
if (('' + arguin).replace('null','').replace('undefined','') == '') {
farris=document.getElementsByTagName('form');
if (eval('' + farris.length) > 0) {
formelemofinterest=farris[0];
if (formelemofinterest.innerHTML.indexOf('<canvas') != -1) {
vscanvasoh='<canvas' + formelemofinterest.innerHTML.split('<canvas')[0].split('>')[0] + '>';
farris=document.getElementsByTagName('canvas');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
canvascaptcha=farris[ifarris];
if (canvascaptcha.outerHTML.indexOf(' id=') == -1) {
canvascaptcha.id='canvascaptcha';
}
}
}
}
}
} else if (('' + arguin.innerHTML).replace('null','').replace('undefined','') != '') {
formelemofinterest=arguin;
if (formelemofinterest.innerHTML.indexOf('<canvas') != -1) {
vscanvasoh='<canvas' + formelemofinterest.innerHTML.split('<canvas')[0].split('>')[0] + '>';
farris=document.getElementsByTagName('canvas');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
canvascaptcha=farris[ifarris];
if (canvascaptcha.outerHTML.indexOf(' id=') == -1) {
canvascaptcha.id='canvascaptcha';
}
}
}
}
}
}
}

if (!formelemofinterest) { return false; }

if (!canvascaptcha) {
formelemofinterest.innerHTML+='<canvas id=canvascaptcha style=display:none;></canvas>';
canvascaptcha=document.getElementById('canvascaptcha');
}
if (!canvascaptcha) { return false; }
if (('' + canvascaptcha.getAttribute('data-initialized')).replace('null','').replace('undefined','') == '') {
newcimgis=new Image();
newcimgis.onload=function(e){
var osbit='';
iandcwidth=newcimgis.width;
iandcheight=newcimgis.height;
if (iandcwidth > 800) {
canvascaptcha.width=iandcwidth;
canvascaptcha.height=iandcheight;
} else {
canvascaptcha.width=800;
canvascaptcha.height=Math.round(newcimgis.height * 800 / newcimgis.width);
}
canvascaptchacontext=canvascaptcha.getContext('2d');
canvascaptchacontext.drawImage(newcimgis, 0, 0, newcimgis.width, newcimgis.height, 0, 0, canvascaptcha.width, canvascaptcha.height);
canvascaptcha.setAttribute('data-initialized', 'y');
mcolrand=eval(1 + Math.floor(Math.random() * eval(-1 + eval('' + mcollist.length))));
if (formelemofinterest.innerHTML.replace(/\"/g,'').replace(/\'/g,'').indexOf(' type=submit') == -1) {
formelemofinterest.innerHTML+='<br><input id=subcaptcha type=submit style=display:block; value=Submit></input><br><br><div id=cstuff><span id=spancaptcha style="display:none;background-color:' + mcollist[mcolrand] + ';">Click below on same colour as background of this text.<br>On success image disappears and you can retry.</span><br><br><img style=display:none; onclick=checkcaptcha(event); id=imgcaptcha data-clickedcol="#000000" width=' + canvascaptcha.width + ' height=' + canvascaptcha.height + ' src="' + canvascaptcha.toDataURL('image/png') + '"></img></div>';
submitcaptcha=document.getElementById('subcaptcha');
} else {
if (formelemofinterest.innerHTML.indexOf(' type="submit"') != -1) {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(' type="submit"')[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(' type="submit"')[0].split('<input').length)] + ' type="submit"' + formelemofinterest.innerHTML.split(' type="submit"')[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
} else if (formelemofinterest.innerHTML.indexOf(" type='submit'") != -1) {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(" type='submit'")[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(" type='submit'")[0].split('<input').length)] + " type='submit'" + formelemofinterest.innerHTML.split(" type='submit'")[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
} else {
vscanvasoh='<input' + formelemofinterest.innerHTML.split(" type=submit")[0].split('<input')[eval(-1 + formelemofinterest.innerHTML.split(" type=submit")[0].split('<input').length)] + " type=submit" + formelemofinterest.innerHTML.split(" type=submit")[1].split('>')[0] + '>';
farris=document.getElementsByTagName('input');
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.indexOf(vscanvasoh) == 0) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
formelemofinterest.innerHTML+='<br><br><div id=cstuff><span id=spancaptcha style="display:none;background-color:' + mcollist[mcolrand] + ';">Click below on same colour as background of this text.<br>On success image disappears and you can retry.</span><br><br><img style=display:none; onclick=checkcaptcha(event); id=imgcaptcha data-clickedcol="#000000" width=' + canvascaptcha.width + ' height=' + canvascaptcha.height + ' src="' + canvascaptcha.toDataURL('image/png') + '"></img></div>';
}
formelemofinterest.setAttribute('data-need', '' + mcolrand);
imgcaptcha=document.getElementById('imgcaptcha');
spancaptcha=document.getElementById('spancaptcha');

if (formelemofinterest.outerHTML.indexOf(' onsubmit=') == -1) {
formelemofinterest.onsubmit=function(){ return realonsubmitreturn(''); };
} else if (formelemofinterest.outerHTML.indexOf(' onsubmit="') != -1) {
osbit=formelemofinterest.outerHTML.split(' onsubmit="')[1].split('"')[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha || 1== 1) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('1:' + submitcaptcha.id);
overlaybrect=document.getElementById('mysub').getBoundingClientRect();
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo onclick="spancaptcha.style.display=' + "'inline'" + '; imgcaptcha.style.display=' + "'block'" + '; alert(1987); this.style.display=' + "'none'" + '; "></input>';
overlaybo=document.getElementById('myverlaybo');
//submitcaptcha.onmouseover=function(event){ document.title=('' + event.target.id); return realonsubmitreturn(''); };
//alert('11:' + submitcaptcha.id);
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
//alert('111:' + submitcaptcha.id + ' ' + submitcaptcha.outerHTML);
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
} else if (formelemofinterest.outerHTML.indexOf(" onsubmit='") != -1) {
osbit=formelemofinterest.outerHTML.split(" onsubmit='")[1].split("'")[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha && overlaybrect == null) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('' + submitcaptcha.id);
submitcaptcha.onmousedown=function(event){ return realonsubmitreturn(''); };
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
} else if (formelemofinterest.outerHTML.indexOf(' onsubmit=') != -1) {
osbit=formelemofinterest.outerHTML.split(' onsubmit=')[1].split(' ')[0];
if (osbit.indexOf('onsubmitreturn(') == -1) {
oldOsHandler=formelemofinterest.onsubmit;
formelemofinterest.setAttribute('data-wasos', osbit);
if (11 == 11) {
spancaptcha.style.display='inline';
imgcaptcha.style.display='block';
if (!submitcaptcha || 2 == 2) {
for (ifrarris=0; ifarris<farris.length; ifarris++) {
if (farris[ifarris].outerHTML.replace(/\'/g,'').replace(/\"/g,'').indexOf(' type=submit') != -1) { // && !submitcaptcha) {
if (!submitcaptcha && overlaybrect == null) {
submitcaptcha=farris[ifarris];
overlaybrect=submitcaptcha.getBoundingClientRect();
}
}
}
} else {
overlaybrect=submitcaptcha.getBoundingClientRect();
}
formelemofinterest.innerHTML+='<input type=button style="z-index:6754;position:absolute;top:' + overlaybrect.top + 'px;left:' + overlaybrect.left + 'px;width:' + overlaybrect.width + 'px;height:' + overlaybrect.height + 'px;" value="' + submitcaptcha.value + '" id=myoverlaybo data-onclick="if (onsubmitreturn(' + "'frombutton'" + ')) { this.style.display=' + "'none'" + '; } "></input>';
overlaybo=document.getElementById('myverlaybo');
} else if (1 == 1) {
//alert('3:' + submitcaptcha.id);
submitcaptcha.onmousedown=function(event){ return realonsubmitreturn(''); };
submitcaptcha.ontouchdown=function(event){ return realonsubmitreturn(''); };
} else {
formelemofinterest.onsubmit=function(event){ if (realonsubmitreturn()) { if (oldOsHandler){ oldOsHandler(); } } else { return false; } };
}
}
}

};
setTimeout(function(){
newcimgis.src='data:image/webp;base64,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';
}, 2000);
}

return false;
}

… in a changed colour_code_captcha.js external Javascript helping out the changed colour_code_captcha.htm testing HTML with onsubmit already defined


Previous relevant Colour Coded Form Captcha Tutorial is shown below.

Colour Coded Form Captcha Tutorial

Colour Coded Form Captcha Tutorial

Are you human?

This is not such a silly question, in the online world. There are ways to access software with no real human intervention among …

  • legitimately
  • usefully
  • unintendedly
  • maliciously

… and if you design a web application looking after details entered by a user, often you want to ensure the processing is being done by a real user, in the first two ways.

Years ago, with this in mind, came CAPTCHA logic …

A CAPTCHA (/ˈkæp.tʃə/ KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

Those ones with the segmented images and you are asked to click in all parts containing a bike, for instance, yours truly finds very tricky. Yes, today’s idea from us is a lot simpler. It just involves …

  • colour coding
  • a Dutch artistic genius … Piet Mondrian
  • Pixabay‘s access to that genius … thanks, all concerned …
  • a love of simplicity (and mostly, primary colours) …
  • HTML5 canvas element … especially it’s method …
  • getImageData() method

… allowing us to scrutinize image pixel colours at a clicked position. And just in case users are colour blind, we diss any colour names and use background comparison question reasoning in the code.

As seemingly silly as this sounds, it’s insertion into an HTML webpage form element’s onsubmit event logic (and we found out, we needed to force an input type=submit button, if not there), is an extra step to deter processes not being run by a real user accessing the form.

Today, we’ve supplied a really simple parent overseer colour_code_captcha.html example usage (that just writes a personalized (but not gift wrapped, alas) welcome message near the top of the webpage) …


<html>
<head>
<script type='text/javascript' src='//www.rjmprogramming.com.au/colour_code_captcha.js' defer></script>
<script type='text/javascript'>
var fname=location.search.split('fname=')[1] ? decodeURIComponent(location.search.split('fname=')[1].split('&')[0]) : "";
var lname=location.search.split('lname=')[1] ? decodeURIComponent(location.search.split('lname=')[1].split('&')[0]) : "";
</script>
</head>
<body onload="if ((fname + lname).trim() != '' && document.referrer.indexOf('/colour_code_captcha.') != -1) { document.getElementById('welcome').innerHTML='<h2>Welcome to ' + fname + ' ' + lname + ' at ' + ('' + new Date()) + ' ...</h2>'; }">
<div id=welcome></div>
<form data-onsubmit="return onsubmitreturn('');" action='./colour_code_captcha.html' method=GET>
<input style=text placeholder="First name" name=fname type=text></input><br>
<input style=text placeholder="Last name" name=lname type=text></input><br>
<br><input id=mysub type=submit value="Say hello ..."></input>
</form>
</body>
</html>

… of that one external Javascript script tool doing just about all the CAPTCHA work insinuated into the parent webpage’s first such HTML form element found, via colour_code_captcha.js first draft external Javascript you can also try below …

If this was interesting you may be interested in this too.


If this was interesting you may be interested in this too.

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