HTML Table Cell Maintained Dimensions Multiple Variably Zoomed Content Tutorial

Today we build on yesterday’s transformational HTML Table Cell Maintained Dimensions Variably Zoomed Content Transform Tutorial building more flexibility and power into the way it can be used.

So far with these usages we can stick to HTML and Javascript and CSS usage because the information we pass is small enough to pass in a (web browser address bar) URL for …

up to 6 URLs corresponding to the 6 (of 9) available table cells we set aside for content
transformOrigin setting data
transform setting data

… so that we can …

modify the current webpage table cell look
create a new webpage window table cell look
do both

… via the mechanism of turning the “Content:” wording of the webpage into a “Content button” (plus the colon), that button opening a Javascript window.prompt (popup window) where the user can define all these “content” functionality improvements. With URLs we are mainly thinking of ones from the rjmprogramming.com.au domain, with no guarantee on you trying any others.

See, codewise, how we can take a URL and load the ($_GET[]) parameters into the table cells …

And yet again, try a liverun link into a new window or see it in an HTML iframe below …

… and HTML and Javascript and CSS zoom_in_middlehtm code (that changed >thisway) you can download if you like. And yet again, we hope it is food for thought for you, yours and theirs.

Previous relevant HTML Table Cell Maintained Dimensions Variably Zoomed Content Transform Tutorial is shown below.

HTML Table Cell Maintained Dimensions Variably Zoomed Content Transform Tutorial

In yesterday’s HTML Table Cell Maintained Dimensions Variably Zoomed Content Primer Tutorial you eagled-eyed readers will have noted a means by which we …

made life easier for ourselves … and …
aided with genericization

… going from the static Zoom=50% (Scale=0.5) display scenarios of Speech to Text LibreOffice Template Tutorial to the user controlled dynamic HTML iframe “child” ways of yesterday was to involve a CSS Property called …

transform-origin ... as in the CSS definition ... <style> #myDIV { transform-origin: 20% 40%; } </style>

… which can also be expressed (in a more dynamic way, at least in our books … but never in our pamphlettes …) via Javascript DOM style …

[HTMLElementObject].style.transformOrigin ... as in the Javascript (DOM) (equivalent) codeline (to CSS example above) ... document.getElementById("myDIV").style.transformOrigin = "20% 40%";

… except that yesterday, in order not to do our head in, we had a CSS transform-origin or Javascript DOM [HTMLElementObject].style.transformOrigin scenario of 0% 0% … in other words, “scale from the top left” (or maybe you’d prefer the habit of left top to keep x, y as preferred thinking order).

Why even talk about this? Well, the default CSS transform-origin or Javascript DOM [HTMLElementObject].style.transformOrigin scenario is, in “HTML web browser land”, 50% 50% which is a mathematical approach sensible default in our books (pamphlettes? smamplettes?!), but not of practical benefit to the idea of squeezing zoomed content into tight spaces. Sorry not to go fully “International” in my thinking, but we left to right readers tend to look at the ~~top left~~ left top as our eye focus point, so it makes more sense for we left to right readers to use CSS transform-origin or Javascript DOM [HTMLElementObject].style.transformOrigin scenario of 0% 0% as the “hinge point” for transformations. Now, there’s the word we wanted to get to … transformations … in “CSS land” (and hence “Javascript DOM land” too) a wide variety of functionality for transformation (of HTML elements) exists. The ones we make user controllable today go like the CSS 2D Property …

transform ... as in the CSS definition ... <style> #myDIV { transform: scale(0.5) rotate(0deg) translate(0%,0%) skew(0deg,0deg); } </style>

… and yes, there are 3D ones too … which can also be expressed (in a more “way dynamagnifencentique”, at least in our books … reject these paplettes …) via Javascript DOM style …

[HTMLElementObject].style.transform ... as in the Javascript (DOM) (equivalent) codeline (to CSS example above) ... document.getElementById("myDIV").style.transform = "scale(0.5) rotate(0deg) translate(0%,0%) skew(0deg,0deg)";

… and so, it’s our job, in our new Javascript function …

… to piece all that new user controlled HTML element data into a Javascript DOM statement like above, in order to make the resultant HTML table cell (with maintained dimensions) zoomed or scaled (or not) content be more manipulative (that dastardly content?!).

Again, try a liverun link into a new window or see it in an HTML iframe below …

… and HTML and Javascript and CSS zoom_in_middlehtml code (that changed >thisway) you can download if you like. Again, we hope it is food for thought for you.

Previous relevant HTML Table Cell Maintained Dimensions Variably Zoomed Content Primer Tutorial is shown below.

HTML Table Cell Maintained Dimensions Variably Zoomed Content Primer Tutorial

Yesterday’s Speech to Text LibreOffice Template Tutorial had synergies with process, explained yesterday, and synergies with trying to express zoomed content in a limited space, involving two quite different concepts …

Hangman Game
LibreOffice Template

… us deciding on a static Zoom=50% (Scale=0.5) display with this in yesterday’s work. This got us wondering if we can design a proof of concept web application where …

the Zooming (or Scaling) can be dynamically selected by the user, bit like those magnifier functionalities so popular on fashion eCommerce websites
a couple of content choices (as above) can be dynamically selected by the user
the display of this content can be created at …
1. document.body onload event … and/or …
2. onclick event … shared Javascript code as per …
  function load_zoomed_content(prefix,othis) { prefx=prefix; if (othis.innerHTML.indexOf('over' + 'flow') == -1) othis.innerHTML+='<div onclick="prefx=' + "'" + prefix + "';" + '" id="' + prefix + 'divhangman" style="background-color:white;overflow:hidden;width:100%;height:100%;"></div>'; myw=eval(window.getComputedStyle(document.getElementById(prefix + 'divhangman'), null).getPropertyValue('width').replace('px','')); // + myw; myh=eval(window.getComputedStyle(document.getElementById(prefix + 'divhangman'), null).getPropertyValue('height').replace('px','')); // + myh; document.getElementById(prefix + 'divhangman').innerHTML='<iframe onclick="prefx=' + "'" + prefix + "';" + '" style="border:1px solid red;transform-origin: 0% 0%;transform:scale(' + document.getElementById('scale').value + '); -o-transform: scale(' + document.getElementById('scale').value + '); -moz-transform: scale(' + document.getElementById('scale').value + '); -ms-transform: scale(' + document.getElementById('scale').value + '); -webkit-transform: scale(' + document.getElementById('scale').value + ');width:' + Math.floor(eval(eval(100.0 / document.getElementById('scale').value))) + '%;height:' + Math.floor(eval(eval(100.0 / document.getElementById('scale').value))) + '%;" id="' + prefix + 'ihangman" src="hangman_bg.html?curplayer=' + curplayer + '&tosolve=' + encodeURIComponent(swhatshort) + "&clue=" + encodeURIComponent(clue) + '"></iframe>'; if (document.getElementById('ohangman').value.indexOf('?') == -1) { prefx=prefix; docontent('hangman_bg.html?curplayer=' + curplayer + '&tosolve=' + encodeURIComponent(swhatshort) + "&clue=" + encodeURIComponent(clue)); doscale(document.getElementById('scale').value); } else { prefx=prefix; docontent(document.getElementById('content').value); doscale(document.getElementById('scale').value); } othis.style.width=Math.floor(eval(myw)) + 'px'; othis.style.height=Math.floor(eval(myh)) + 'px'; othis.style.maxWidth=Math.floor(eval(myw)) + 'px'; othis.style.maxHeight=Math.floor(eval(myh)) + 'px'; document.getElementById(prefix + 'divhangman').style.width=Math.floor(eval(myw)) + 'px'; document.getElementById(prefix + 'divhangman').style.height=Math.floor(eval(myh)) + 'px'; document.getElementById(prefix + 'divhangman').style.maxWidth=Math.floor(eval(myw)) + 'px'; document.getElementById(prefix + 'divhangman').style.maxHeight=Math.floor(eval(myh)) + 'px'; document.getElementById(prefix + 'ihangman').style.width=Math.floor(eval(eval(1.0 / document.getElementById('scale').value) * myw)) + 'px'; document.getElementById(prefix + 'ihangman').style.height=Math.floor(eval(eval(1.0 / document.getElementById('scale').value) * myh)) + 'px'; document.getElementById(prefix + 'ihangman').style.maxWidth=Math.floor(eval(eval(1.0 / document.getElementById('scale').value) * myw)) + 'px'; document.getElementById(prefix + 'ihangman').style.maxHeight=Math.floor(eval(eval(1.0 / document.getElementById('scale').value) * myh)) + 'px'; }
for a webpage consisting of a 3×3 grid of HTML table cells (td)

Try a liverun link into a new window or see it in an HTML iframe below …

… and HTML and Javascript and CSS zoom_in_middlehtml code you can download if you like. We hope it is food for thought for you.

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HTML Table Cell Maintained Dimensions Multiple Variably Zoomed Content Tutorial ☞