PDF Image and Text Nodes Canvas Scaling Tutorial
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PDF Image and Text Nodes Canvas Scaling Tutorial

PDF Image and Text Nodes Canvas Scaling Tutorial   🔍

Yesterday’s PDF Image and Text Nodes Absolute Image URL Tutorial got us to thinking about the idea that the image you select as a backdrop to your PDF A4 Portrait or Landscape page may not suit with the dimensions it has to start with. So what if we add the equivalent of …

  • Zoom In
  • Zoom Out
  • Actual Size

… means by which we can call into play ourchanged pdfimageplustext⚫php Image✂and Text PDF creator PHP web application’s “behind the scenes” canvas element to help out. After all, the canvas element has great functionality for transformations, and to scale an image is a transformation.

Below is relevant new (stage 2 relevant) HTML …



<button title='Zoom In' onclick=zoomin();>+</button>&nbsp;<button title='Zoom Out' onclick=zoomout();>-</button>&nbsp;<button title='Actual Size' onclick=zoomone();>=</button>

… and Javascript …



function zoomin() {

scaleim(eval(curfactor * 1.1));

}



function zoomout() {

scaleim(eval(curfactor / 1.1));

}



function zoomone() {

if (Math.abs(eval(1.0 - eval('' + curfactor))) > 0.0001) {

scaleim(1.0);

}

}



function scaleim(towhat) {



mycanvas = document.getElementById('canvas');

ctx = mycanvas.getContext('2d');

myimg = new Image;

myimg.onload = function() {

var ow=myimg.width;

var oh=myimg.height;

mycanvas.width=eval(myimg.width * towhat / curfactor);

mycanvas.height=eval(myimg.height * towhat / curfactor);

mycanvas.style.width='' + eval(myimg.width * towhat / curfactor) + 'px';

mycanvas.style.height='' + eval(myimg.height * towhat / curfactor) + 'px';

if (document.getElementById('tsiz')) {

ctx.font = '' + document.getElementById('tsiz').value.trim() + 'px ' + document.getElementById('tfam').value.trim();

}

if (document.getElementById('tcol')) {

ctx.fillStyle='' + document.getElementById('tcol').value.trim();

}

ctx.drawImage(myimg,0,0,ow,oh,0,0,mycanvas.width,mycanvas.height); // Or at whatever offset you like

//alert(564);

awonow=mycanvas.toDataURL('image/jpeg');

sofarso=sofarso.replace(awowatchsofar, awonow);

awowatchsofar=awonow;

datauri=awonow;

if (actualuri == '') { actualuri=datauri; }

datauris[0]=datauri;

document.getElementById('slideshow').value=awonow;

document.body.style.backgroundImage='url(' + awonow + ')';

if (document.getElementById('inimg')) {

document.getElementById('inimg').style.width='' + eval(mycanvas.width * towhat / curfactor) + 'px';

document.getElementById('inimg').style.height='' + eval(mycanvas.height * towhat / curfactor) + 'px';

document.getElementById('inimg').width=eval(mycanvas.width * towhat / curfactor);

document.getElementById('inimg').height=eval(mycanvas.height * towhat / curfactor);

document.getElementById('inimg').src=awonow;

}

curfactor=eval('' + towhat);

document.getElementById('dimap').innerHTML=\"<img id=imimg style='z-index:99;visibility:visible;position:absolute;top:0px;left:0px;' src='\" + datauri + \"' width='\" + mycanvas.width + \"' height='\" + mycanvas.height + \"' alt='Map' usemap='#immap'><map name='immap' id='immap'><area data-onclick='areaclick=true;' shape='default' nohref alt='' /></map>\";

};

if (Math.abs(eval(1.0 - eval('' + towhat))) < 0.0001) {

myimg.src = actualuri;

} else {

myimg.src = document.getElementById('slideshow').value;

}



}

… code regarding this useful functionality improvement, today.


Previous relevant PDF Image and Text Nodes Absolute Image URL Tutorial is shown below.

PDF Image and Text Nodes Absolute Image URL Tutorial

PDF Image and Text Nodes Absolute Image URL Tutorial   🔍

Regarding yesterday’s PDF Image and Text Nodes Relative URL Integration Tutorial …

Yeh, yeh, yeh!
Relative smellative!
What about Absolute?

Well, true enough, but the user here, must consider plagiarism and content appropriation wrongdoings here, and that is why we leave this idea to late in the piece, and not exactly advertise its use as you use this✂inhouse PHP web application. As well as the fact that most absolute image URLs will fail if you enter them into the “middle management” textbox you can see in action with today’s animated GIF presentation. Nevertheless, some absolute image URLs can be entered into that textbox and form the backdrop of your PDF creation now with achanged pdfimageplustext⚫php Image✂and Text PDF creator PHP web application.

The new PHP to do this uses a call to itself, in an iframe, to …

<?php


if (isset($_GET['aburl'])) {

$imdata=str_replace('+',' ',urldecode($_GET['aburl']));

$jmdata='';

$kmdata='';

if ($imdata != '') {

if (strpos(('~' . $imdata), '~//') !== false) {

$jmdata=file_get_contents('http:' . $imdata);

} else if (strpos(strtolower(('~' . $imdata)), '~https:') !== false) {

$jmdata=file_get_contents('http:' . substr($imdata, 6));

} else {

$jmdata=file_get_contents($imdata);

}

if ($jmdata != '') {

$kmdata='data:image/' . str_replace('jpg','jpeg',strtolower(explode('.',$imdata)[-1 + sizeof(explode('.',$imdata))])) . ';base64,' . base64_encode($jmdata);

echo '<html><body onload=" parent.document.getElementById(' . "'iurl'" . ').value=' . "'" . $kmdata . "'" . '; "></body></html>';

}

}

exit;

}


?>

Previous relevant PDF Image and Text Nodes Relative URL Integration Tutorial is shown below.

PDF Image and Text Nodes Relative URL Integration Tutorial

PDF Image and Text Nodes Relative URL Integration Tutorial   🔍

Progressing with improved integrations, on top of the work of yesterday’s PDF Image and Text Nodes Annotations Tutorial, today, we’re revisiting our Relative URL software integration you can read previous progress regarding, with Image and Text Multiple PDF Relative URL Tutorial.

Then, its integration …

  • just supplied relative URL strings … but today, we integrate by …
  • allowing user to click a found thumbnail image of a found Relative URL (ie. on RJM Programming domain) image as the backdrop to a PDF creation

In order to do this we set up the stage 1 hierarchy …

… involving changed condition specific PHP as per …

<?php


$fps="";

$tb="";

$thash="";

$onebad="youllneverfind" . "this";

$twobad="youllneverfind" . "this";

$threebad="youllneverfind" . "this";

$fourbad="youllneverfind" . "this";

$onebadx="youllneverfind" . "this";

$twobadx="youllneverfind" . "this";

$threebadx="youllneverfind" . "this";

$fourbadx="youllneverfind" . "this";

$fivebad="youllneverfind" . "this";

$sixbad="youllneverfind" . "this";

$onl="";

$oncl="";

$onclg="";

$deforder="<option value='-5'>Preview every change for 5 seconds</option><option value='0'>Do no previewing of changes</option>";

$onclf="";

$previewif="<br><iframe name=preview id=preview style=display:none;></iframe>";



if (isset($_GET['fillps'])) {

$fps='<input type=hidden name=fillps value=y></input>';

$oncl=' onclick=" if (window.parent && parent.document.getElementById(' . "'" . 'spreview' . "'" . ')) { top.document.getElementById(' . "'" . 'iurl' . "'" . ').value=this.getAttribute(' . "'" . 'data-href' . "'" . '); top.document.getElementById(' . "'" . 'slideshow' . "'" . ').value=this.getAttribute(' . "'" . 'data-href' . "'" . '); this.target=' . "'" . 'sspreview' . "'" . '; } else if (window.opener) { window.opener.top.document.getElementById(' . "'" . 'slideshow' . "'" . ').value=this.href; } else { top.document.getElementById(' . "'" . 'slideshow' . "'" . ').value=this.href; } "';

$onclg='fillps=y&';

$tb="target=sspreview\t";

$onebad="href=./";

$twobad="href=./PHP/";

$threebad=">./";

$fourbad=">./PHP/";

$onebadx="href=../";

$twobadx="href=/";

$threebadx=">../";

$fourbadx=">/";

$thash="data-";

$fivebad=$_SERVER['DOCUMENT_ROOT'];

$sixbad="";

$deforder="<option value='0'>Do no previewing of changes</option><option value='-5'>Preview every change for 5 seconds</option>";

$onclf="<input id=fillps name=fillps type=hidden value=y></input>";

if ($onl == '') { $onl=' onload="postxit();"'; }

}


?>

Previous relevant PDF Image and Text Nodes Annotations Tutorial is shown below.

PDF Image and Text Nodes Annotations Tutorial

PDF Image and Text Nodes Annotations Tutorial   🔍

Modular software is good, in the sense that …

  • jobs developing the software can be compartmentalized
  • jobs developing the software can involve specalized skills
  • software components do not get too big and unwieldy

… and so when we felt, with yesterday’s PDF Image and Text Nodes and Lines and Rectangles Tutorial …

Lines and Rectangles are good … but …

… “other forms of annotation would be better”! And yes, that’s true, but not if it compromises the efficacy of the existing “PDF Image and Text Nodes (and Lines and Rectangles) Creator” PHP web application. Rather than reinventing an “annotation wheel” we’re turning towards …

… we’ve developed in the past, about which you can read at Emoji Borders and Backgrounds Canvas Annotation Tutorial, regarding functionality to enable “scribble” based canvas signature creation, as well as several discrete click based shape and text and image annotation functionalities, all allowing for opacity control, to aid with overlay ideas. Now that could be useful, we figure. And luckily, we’ve integrated this functionality before, and used a …

  • window.opener look, at the existing inhouse canvas based Annotation Menu web application, for a parent integrator … for which …
  • a canvas element data interchange happens

… and we add to that unchanged “existing inhouse canvas based Annotation Menu web application” arrangement, (setTimeout timer) parent checking …



function awowatch() {

if (awo) {

if (!awo.closed) {

var awonow=awo.document.getElementById('topcanvas').toDataURL('image/jpeg');

if (awowatchsofar != awonow) {

sofarso=sofarso.replace(awowatchsofar, awonow);

awowatchsofar=awonow;

datauri=awonow;

datauris[0]=datauri;

document.getElementById('slideshow').value=awonow;

document.body.style.backgroundImage='url(' + awonow + ')';

if (document.getElementById('inimg')) {

document.getElementById('inimg').src=awonow;

}

mycanvas = document.getElementById('canvas');

ctx = mycanvas.getContext('2d');

myimg = new Image;

myimg.onload = function() {

mycanvas.width=myimg.width;

mycanvas.height=myimg.height;

mycanvas.style.width='' + myimg.width + 'px';

mycanvas.style.height='' + myimg.height + 'px';

ctx.font = '' + document.getElementById('tsiz').value.trim() + 'px ' + document.getElementById('tfam').value.trim();

ctx.fillStyle='' + document.getElementById('tcol').value.trim();

ctx.drawImage(myimg,0,0); // Or at whatever offset you like

//alert(564);

document.getElementById('dimap').innerHTML=\"<img id=imimg style='z-index:99;visibility:visible;position:absolute;top:0px;left:0px;' src='\" + datauri + \"' width='\" + myimg.width + \"' height='\" + myimg.height + \"' alt='Map' usemap='#immap'><map name='immap' id='immap'><area data-onclick='areaclick=true;' shape='default' nohref alt='' /></map>\";

};

myimg.src = document.getElementById('slideshow').value;

console.log('changed ');

}

setTimeout(awowatch, 5000);

console.log('ongoing ' + (awonow + '...............................').substring(0,19));

} else {

awo=null;

console.log('closed');

}

} else {

setTimeout(awowatch, 5000);

console.log('null');

}

}

… of child canvas content, and if changed, reflect the changes in the parent canvas and document.body background image, sort of like we did with the emoji text earlier on (with Image and Text PDF Timesheet Emojis Tutorial), with itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application, whose “blurb” in stage 2 now reads …

<?php echo ”


document.getElementById('mybody').title='Click once where text to be placed in resultant PDF or more for Annotations. Can use suffix such as x 5 to repeat value on 4 clicks to follow. With dates go consult https://www.w3schools.com/php/func_date_date_format.asp DATE_ATOM type entries where DATE_ followed by ymd lowercase character correspondence in 2nd part means change just date via ymd means where date_ followed by hms lowercase character correspondence in 2nd part means change time via hms means where uppercase 2nd part preceeded by ymd lowercase character in 1st part means change datetime via ymd means where datE_ followed by hms lowercase character correspondence in 2nd part means change datetime via hms means. Incrementing scale can be done via ++ or -- or +=2 or -=4 types of strings before x 5 repeat definitions. An offset to DATE_ATOM type entry meaning of today & now can be achieved via no spaces between it & offset ++ or -4 type of string & optional more until string such as Tuesday. Basis date is " . $newdts . "';


“; ?>

Did you know?

There are many favoured techniques individual programmers and organizations will have towards software integration.

For us, being so fond of interpretive (you might say, substitutional) approaches, to add to …

  • change hardcodings to parameterized variables … we’d like to add, as exemplified in today’s work …
  • the Javascript popup box escalation from (the kind of dumb, but informative) alert popup box to (the just as informative, but also interactive, and so potentially dynamically useful to the user) prompt popup box usage

… exemplified by the Javascript code snippet …



if (eval('' + xs.length) < 3) {
// alert('line');

fans=prompt('Draw a line? ' + String.fromCharCode(10) + String.fromCharCode(10) + 'OK for line ' + String.fromCharCode(10) + 'Cancel for text ' + String.fromCharCode(10) + '+ for Annotations and Signatures Canvas Menu', '');

} else {

if (Math.abs(xs[0] - x) <= 0.000004) {
xfilledr='';
// alert('rectangle');

fans=prompt('Draw a rectangle? ' + String.fromCharCode(10) + String.fromCharCode(10) + 'OK for rectangle ' + String.fromCharCode(10) + 'Cancel for text ' + String.fromCharCode(10) + '- for lines ' + String.fromCharCode(10) + '+ for Annotations and Signatures Canvas Menu', '');

} else {

xfilledr='x';

// alert('filled rectangle');

fans=prompt('Infill a rectangle? ' + String.fromCharCode(10) + String.fromCharCode(10) + 'OK for infilled rectangle ' + String.fromCharCode(10) + 'Cancel for text ' + String.fromCharCode(10) + '- for lines ' + String.fromCharCode(10) + '+ for Annotations and Signatures Canvas Menu', '');

}

}

… means by which we can let the user have access to the integrated Canvas Annotation functionality.

Previous relevant PDF Image and Text Nodes and Lines and Rectangles Tutorial is shown below.

PDF Image and Text Nodes and Lines and Rectangles Tutorial

PDF Image and Text Nodes and Lines and Rectangles Tutorial   🔍

Onto yesterday’s PDF Image and Text Nodes Mobile Scrolling Tutorial‘s progress we turn our attention back to some Fpdf talents …

  • draw lines into a PDF document … and …
  • draw and/or infill rectangles into a PDF document

… as two ideas heading towards “some annotating talents” for our Image and Text Nodes (and now Lines and Rectangles) PDF creator PHP web application. It was again in that onclick logic a lot of the change was needed …



var xs=[], ys=[];



document.getElementById('mybody').onclick=function(e){

var yes=false;

if (areaclick) {

areaclick=false;

} else {

e = e || window.event;

e.preventDefault();

if (!showingc) {

startrecording=true;

if (e.originalEvent) {

if (e.originalEvent.touches) {

yes=true;

}

}

var rectis=document.body.getBoundingClientRect();

if (e.touches) {

if (e.touches[0].pageX) {

x = e.touches[0].pageX;

y = e.touches[0].pageY;

if (eval('' + xs.length) == 0) {

//alert('0:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

} else {

x = eval(-rectis.left + e.touches[0].clientX);

y = eval(-rectis.top + e.touches[0].clientY);

if (eval('' + xs.length) == 0) {

//alert('1:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

}

//console.log('pos3=' + pos3 + ',pos4=' + pos4);

} else if (yes) {

if (e.originalEvent.touches[0].pageX) {

x = e.originalEvent.touches[0].pageX;

y = e.originalEvent.touches[0].pageY;

if (eval('' + xs.length) == 0) {

//alert('0:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

} else {

x = eval(-rectis.left + e.originalEvent.touches[0].clientX);

y = eval(-rectis.top + e.originalEvent.touches[0].clientY);

if (eval('' + xs.length) == 0) {

//alert('1:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

}

//console.log('pos3=' + pos3 + ',pos4=' + pos4);

} else if (e.clientX || e.clientY) {

x = eval(-rectis.left + e.clientX);

y = eval(-rectis.top + e.clientY);

if (eval('' + xs.length) == 0) {

//alert('2:' + rectis.left + ',' + rectis.top);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

} else {

x = e.pageX;

y = e.pageY;

if (eval('' + xs.length) == 0) {

//alert('3:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

xs.push(x);

ys.push(y);

setTimeout(askaway,4500);

} else if (eval('' + xs.length) >= 2) {

if (eval('' + xs.length) == 2) {

document.title+=' | ';

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs.push(Math.abs(xs[0] - xs[1]));

ys.push(Math.abs(ys[0] - ys[1]));

xs[0]=Math.min(xs[0], xs[1]);

ys[0]=Math.min(ys[0], ys[1]);

xs[1]=xs[2];

ys[1]=ys[2];

x=xs[0];

y=ys[0];

// alert(xs.length + ' ? RE rect');

} else {

x=xs[0];

y=ys[0];

if (eval('' + xs.length) == 4) { xs[0]+=0.00001; }

}

} else {

xs.push(x);

ys.push(y);

x=xs[0];

y=ys[0];

}

}

}

}

};

… allowing the user four extra seconds after that first click, now, to …

  • add in one more line end click
  • add in two more clicks for a drawn rectangle extending to the first two click positions
  • add in three or more clicks for a filled in rectangle extending to the first two click positions

… in itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application.

Previous relevant PDF Image and Text Nodes Mobile Scrolling Tutorial is shown below.

PDF Image and Text Nodes Mobile Scrolling Tutorial

PDF Image and Text Nodes Mobile Scrolling Tutorial   🔍

With yesterday’s PDF Image and Text Nodes Windows Tutorial it is time, today, to fix a …

  • mobile device issue in usage …
  • when browsing for files …
  • and using the “Take Photo” option, perhaps …
  • obtaining an image far bigger than the screen …
  • the user scrolls to text node positions

… we start accounting for that scrolling, as per the Javascript changes to document.body onclick event logic …



document.getElementById('mybody').onclick=function(e){

var yes=false;

if (areaclick) {

areaclick=false;

} else {

e = e || window.event;

e.preventDefault();

if (!showingc) {

startrecording=true;

if (e.originalEvent) {

if (e.originalEvent.touches) {

yes=true;

}

}

var rectis=document.body.getBoundingClientRect();

if (e.touches) {

if (e.touches[0].pageX) {

x = e.touches[0].pageX;

y = e.touches[0].pageY;

//alert('0:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

} else {

x = eval(-rectis.left + e.touches[0].clientX);

y = eval(-rectis.top + e.touches[0].clientY);

//alert('1:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

}

//console.log('pos3=' + pos3 + ',pos4=' + pos4);

} else if (yes) {

if (e.originalEvent.touches[0].pageX) {

x = e.originalEvent.touches[0].pageX;

y = e.originalEvent.touches[0].pageY;

//alert('0:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

} else {

x = eval(-rectis.left + e.originalEvent.touches[0].clientX);

y = eval(-rectis.top + e.originalEvent.touches[0].clientY);

//alert('1:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

}

//console.log('pos3=' + pos3 + ',pos4=' + pos4);

} else if (e.clientX || e.clientY) {

x = eval(-rectis.left + e.clientX);

y = eval(-rectis.top + e.clientY);

//alert('2:' + rectis.left + ',' + rectis.top);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

} else {

x = e.pageX;

y = e.pageY;

//alert('3:' + document.body.offsetLeft + ',' + document.body.offsetTop);

document.getElementById('blob').innerHTML+='<div class=dblob onmouseover=\" blobover(this); \" onmouseout=\" blobout(this);\" onclick=\" blobdel(this.id); \" title=\"\" id=\"bpdftext' + coordn + '\" style=\"position:absolute;left:' + eval(0 + x) + 'px;top:' + eval(0 + y) + 'px;background-color:red;z-index:100;\">x</div>';

document.getElementById('immap').innerHTML+=\"<area id=area\" + areacnt + \" alt='\" + cidurls + \"' shape=rect onclick=ack(this.alt,\" + coordn + \",true); coords='\" + eval(-8 + x) + \",\" + eval(-8 + y) + \",\" + eval(8 + x) + \",\" + eval(8 + y) + \"' nohref />\";

areacnt++;

setTimeout(askaway,500);

}

}

}

};

… in itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application.

Previous relevant PDF Image and Text Nodes Windows Tutorial is shown below.

PDF Image and Text Nodes Windows Tutorial

PDF Image and Text Nodes Windows Tutorial   🔍

It’s instructive adding “platforms” to the list of “underlying operating system” functionalities, and though it can be a slow slog, the work you put in now, can help future endeavours. And so, onto the recent Web Share API PDF Book Creation Notifications Tutorial we learnt in adding “Windows” as an “underlying operating system” …

  • you cannot chain PHP exec commands with semicolon …
  • we needed to install Ghostscript for PDF conversion purposes …
  • we needed to remind ourselves that, of course, as far as downloads go, you’ll need to download Fpdf … ours being version version 1.7 and install it to MAMP Document Root folder “MarkItUp/fpdf17” (or MarkItUp\fpdf17 for Windows) …
  • we needed to incorporate DIRECTORY_SEPARATOR operating system file references where we’d hardcoded “/” previously …

… and more reliably, converting to videos, you succeed more often on these local web server environments first converting to …

  • ffmpeg inhouse *.ts format … and then onto …
  • more publicly accessible *.webm format

… and we coded some other “hardcodings become parameterized” matters via …

<?php


$convertcommand="C:\\PROGRA~1\\IMAGEM~1.0-Q\\";

$ffmpegcommand="C:\\PROGRA~1\\IMAGEM~1.0-Q\\";



$mvstr="mv ";

$cpstr="cp ";

$portstr=":8888";



if (PHP_OS =='WINNT' || PHP_OS =='WIN32' || PHP_OS =='Windows') {

$cpstr="copy ";

$mvstr="rename ";

$portstr="";

$convertcommand.="magick.exe ";

if (file_exists($ffmpegcommand . "ffmpeg.exe")) {

$ffmpegcommand.="ffmpeg.exe ";

} else {

$ffmpegcommand="";

}

} else {

if (file_exists("/usr/local/bin/ffmpeg")) {

$ffmpegcommand="/usr/local/bin/ffmpeg ";

} else if (file_exists("/usr/bin/ffmpeg")) {

$ffmpegcommand="/usr/bin/ffmpeg ";

} else {

$ffmpegcommand="";

}

if (file_exists("/usr/local/cpanel/3rdparty/bin/convert")) {

$convertcommand="/usr/local/cpanel/3rdparty/bin/convert ";

} else if (file_exists("/usr/local/bin/convert")) {

$convertcommand="/usr/local/bin/convert ";

} else if (file_exists("/usr/bin/convert")) {

$convertcommand="/usr/bin/convert ";

}

}


?>

… based on personal experience installing MAMP and ImageMagick and ffmpeg and Fpdf and GhostScript here on this Windows laptop, with itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application (we’d now like you to download to MAMP Document Root folder).

Previous relevant Web Share API PDF Book Creation Notifications Tutorial is shown below.

Web Share API PDF Book Creation Notifications Tutorial

Web Share API PDF Book Creation Notifications Tutorial   🔍

Today we’re shoring up the recent Web Share API Intranet Video Tutorial‘s …

… as well as loosening our reliance on ImageMagick “convert” command when converting a set of Jpegs to a PDF Book (and animated GIF), where we are finding it unable to allocate enough memory, on occasions. Instead we pivot back to Fpdf to backup ImageMagick, should it run into trouble with the PDF Book conversion.

And regarding the animated GIF conversion, regarding this ImageMagick subject, it would be great for “Intranet” functionality purposes, to install it on your local device.

Given this, and all the other installing and downloading advice, on your “Intranet” environment, you can now end up with a window showing links to content, or content itself, for …



PDF (Book) -> Animated GIF -> Video

… as you can see with today’s tutorial picture for thechanged HTML and Javascript web_share_api_test⚫html Web Share API supervisor web application (we’d now like you to download to MAMP Document Root and HTMLCSS subfolder, as well as client_browsing⚫htm Client Browsing supervisor) to start making this a possibility, with itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application (we’d now like you to download to MAMP Document Root folder).

Also changed (and good to download into MAMP local Apache/PHP/MySql web server Document Root “PHP/animegif” folder), today, is thechanged tutorial_to_animated_gif⚫php our inhouse Animated GIF Creator helper PHP web application.

If you have created any PDF Books, we have relied on user common sense as to when they try to view that (now Fpdf compiled) PDF made up of a set of individual PDF slide Jpegs (themselves compiled via ImageMagick). To improve that we link to Notifications API interfacing …

<?php


$notifif='';



function wildout($wild, $out) {

global $outputpdf, $notifif, $sizeofdatauris;

$fgo=0;



$inorder=true;

foreach (glob($wild) as $filename) {

pdfaddpage($filename);

if (sizeof(explode('-', $filename)) == 2) {

if (explode('.',('' . explode('-', $filename)[1]))[0] != ('' . $fgo)) { file_put_contents('bad8.bad8', $fgo . ' ... ' . $filename); $inorder=false; }

} else {

file_put_contents('bad7.bad7', $filename);

}

$fgo++;

}



if (($inorder || ('' . $fgo) >= ('' . $sizeofdatauris)) && $fgo != 0) {

file_put_contents('bad9.bad9', 'here ' . $fgo);

if (('' . $fgo) > ('' . $sizeofdatauris)) {

$notifif=' onload=" if (1 == 1) { window.open(' . "'" . 'https://www.rjmprogramming.com.au/HTMLCSS/notifications_ideas.php?scheduledblurb=' . urlencode('PDF Book nearing readiness for sharing now ' . ' ... ' . $fgo . ' of ' . $sizeofdatauris . ' complete') . "'" . ',' . "'notifif','top=50,left=50,width=50,height=50'" . '); } else { window.opener.document.getElementById(' . "'notifif'" . ').src=' . "'" . 'https://www.rjmprogramming.com.au/HTMLCSS/notifications_ideas.php?scheduledblurb=' . urlencode('PDF Book ready for sharing now ...') . "'" . '; } "';

} else {

$notifif=' onload=" if (1 == 1) { window.open(' . "'" . 'https://www.rjmprogramming.com.au/HTMLCSS/notifications_ideas.php?scheduledblurb=' . urlencode('PDF Book ready for sharing now ...') . "'" . ',' . "'notifif','top=50,left=50,width=50,height=50'" . '); } else { window.opener.document.getElementById(' . "'notifif'" . ').src=' . "'" . 'https://www.rjmprogramming.com.au/HTMLCSS/notifications_ideas.php?scheduledblurb=' . urlencode('PDF Book ready for sharing now ...') . "'" . '; } "';

}

}




if ($out != "") {

if (file_exists($out)) { unlink($out); }

$outputpdf->Output($out, "F");

if (file_exists('bad2.bad2') && strpos($_SERVER['SERVER_NAME'], 'rjmprogramming.com.au') !== false) {

if (('' . ourfilesize('bad2.bad2')) != '1' && ('' . ourfilesize('bad2.bad2')) != '2') {

file_put_contents('bad3.bad3', $wild . ' ... ' . $out . ' .;. ' . file_get_contents('bad2.bad2'));

file_put_contents('bad2.bad2', ' ');

}

}

}

}


?>

Previous relevant Web Share API Intranet Video Tutorial is shown below.

Web Share API Intranet Video Tutorial

Web Share API Intranet Video Tutorial   🔍

Adding to yesterday’s Web Share API Animated GIF Tutorial …

  • animated GIF (PDF sharing) … today we add …
  • video (via animated GIF via PDF)

… but we need you to think “Intranet” for our first idea here. Here at our macOS setup we use a MAMP local Apache/PHP/MySql web server as our “Intranet” portal.

We’ve also installed the great ffmpeg on this macOS system, and thanks to some great advice from this link about ffmpeg lossless conversion of animated GIF to video …



ffmpeg -i video.gif -c:v libx264 -preset veryslow -qp 0 output.mp4

… we have atweaked HTML and Javascript web_share_api_test⚫html Web Share API supervisor web application (we’d now like you to download to MAMP Document Root HTMLCSS folder, as well as client_browsing⚫htm Client Browsing supervisor) to start making this a possibility, with itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application (we’d now like you to download to MAMP Document Root folder).

Local web servers will not only have this extra accessible functionality, but their response times should be faster too. The public RJM Programming version will understand a MAMP HTTP://localhost:888/ clone and also look for ffmpeg to facilitate our “Intranet” feeling video creation solution.

Previous relevant Web Share API Animated GIF Tutorial is shown below.

Web Share API Animated GIF Tutorial

Web Share API Animated GIF Tutorial   🔍

On top of yesterday’s Web Share API Download Tutorial work, there are some more advances we’ll like to integrate into our inhouse Web Share API interfacer.

The first of these is to offer an animated GIF file conversion when a PDF (so far just those Books) is the media being shared. When thinking of approaches to encapture image presentation material in a single file when we think of PDF we also often think of animated GIF, as it has the additional advantage of being able to be, in a webpage …

  • an HTML img element … or …
  • an HTML element’s background image

… both offering that image rotation and looping advantages that animated GIF have over PDF, as again the data fidelity and viewing incarnation advantages PDF has over animated GIF. We just needed …



function doit(tv) {

document.getElementById('aag').href=document.getElementById('aag').href.split('&')[0] + '&delay=' + tv;

}




function basebit(inuis) {

if (inuis.indexOf('//') != -1) {

if (inuis.split('//')[1].indexOf('/') != -1) {

return inuis.replace(inuis.split('//')[0] + '//' + inuis.split('//')[1].split('/')[0] + '/','');

}

}

return inuis;

}



function trythis(inpdfidea) {

if (inpdfidea.toLowerCase().indexOf('-0.pdf') != -1) {

woq=window.open(inpdfidea.split('#')[0], '_blank', 'top=50,left=50,width=800,height=800');

document.getElementById('adown').innerHTML+='&nbsp;<a style="text-decoration:none;cursor:pointer;background-color:yellow;border:2px solid red;margin: 13px 13px 13px 13px;" target=_blank title="Download ' + ('/' + inpdfidea.split('#')[0]).split('/')[eval(-1 + ('/' + inpdfidea.split('#')[0]).split('/').length)] + ' PDF Book" href="' + inpdfidea.split('#')[0] + '" download>' + '&nbsp;Download <font size=1>' + ('/' + inpdfidea.split('#')[0]).split('/')[eval(-1 + ('/' + inpdfidea.split('#')[0]).split('/').length)] + '</font> PDF Book&nbsp;</a>&nbsp;<a style="text-decoration:none;cursor:pointer;background-color:pink;border:2px solid blue;margin: 13px 13px 13px 13px;" target=_blank title="Create ' + ('/' + inpdfidea.split('#')[0]).split('/')[eval(-1 + ('/' + inpdfidea.split('#')[0]).split('/').length)].replace('-0.pdf','-ag.gif') + ' Animated GIF" href="/pdfimageplustext.php?first=' + encodeURIComponent(basebit(inpdfidea).split('#')[0].replace('-0.pdf','-0.jpg')) + '&delay=500' + '" id=aag>' + '&nbsp;Create <font size=1>' + ('/' + inpdfidea.split('#')[0]).split('/')[eval(-1 + ('/' + inpdfidea.split('#')[0]).split('/').length)].replace('-0.pdf','-ag.gif') + '</font> Animated GIF Delay &nbsp;</a>&nbsp;<input onchange=doit(this.value); type=number style=display:inline-block;background-color:pink; value=500 min=1 step=1 id=iag></input>';

}

return inpdfidea;

}

… in thechanged HTML and Javascript web_share_api_test⚫html Web Share API supervisor web application to start making this a possibility, with itschanged, sometimes supervisory pdfimageplustext⚫php Image✂and Text PDF PHP web application.

Previous relevant Web Share API Primer Tutorial is shown below.

Web Share API Primer Tutorial

Web Share API Primer Tutorial   🔍

The web is improved by operating system Context Menus via right clicks or two finger gestures over …

  • links
  • media
  • document

… webpage contents. Today, we roadtest a web API called “Web Share API” that simulates right clicks or two finger gestures with your normal everyday button press on a webpage.

Of most use, is the “Web Share API” which can take multiple selected files (via a “browse” type button) …



// Thanks to https://developer.mozilla.org/en-US/docs/Web/API/Navigator/share



document.getElementById('share').addEventListener('click', async () => {

const files = input.files



if (files.length === 0) {

shareurl();

output.textContent = 'No files selected.'

return

}



// feature detecting navigator.canShare() also implies

// the same for the navigator.share()

if (!navigator.canShare) {

output.textContent = `Your browser doesn't support the Web Share API.`

return

}



if (navigator.canShare({ files })) {

try {

await navigator.share({

files,

title: 'Media or documents',

text: 'Take a look at media or documents below' + String.fromCharCode(10) + String.fromCharCode(10)

})

output.textContent = 'Shared!'

} catch (error) {

output.textContent = `Error: ${error.message}`

}

} else {

output.textContent = `Your system doesn't support sharing these files.`

}

});

… and attach them to an email or SMS or some other “Sharing Application” on that operating system “Context Menu” in readiness for the user to fill in other requirements and then send off to the recipient, as required.

This API was a little strange to us in that on this macOS setup Safari web browser worked, rather than Google Chrome, which is a turn around from our usual expectations with these experimental Javascript APIs. Feel free to try our “proof of concept” “Web Share API” based, thanks, HTML and Javascript web application you can also try below …

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