Drag and Drop Z-Index Stacking
In an example for a previous post, I showed you how to use opacity during a drag'n'drop transaction. One bit I didn't account for was element stacking and bringing the most recent element to the top of the stack. To do so, we'll need to use a variable that represents the highest zIndex, which we'll be incrementing.
The MooTools JavaScript
window.addEvent('domready',function() {
var zIndex = 2;
$$('.draggable').each(function(el) {
var drag = new Drag.Move(el,{
grid: false,
preventDefault: true,
onStart: function() {
el.setStyle('z-index',zIndex++); //increment!
}
});
});
});
As you probably expected, the process is as simple as it gets. Correct stacking order is incredibly important as you don't want items to be wrongly buried.
![fetch API]()
One of the worst kept secrets about AJAX on the web is that the underlying API for it, XMLHttpRequest, wasn't really made for what we've been using it for. We've done well to create elegant APIs around XHR but we know we can do better. Our effort to...
![Regular Expressions for the Rest of Us]()
Sooner or later you'll run across a regular expression. With their cryptic syntax, confusing documentation and massive learning curve, most developers settle for copying and pasting them from StackOverflow and hoping they work. But what if you could decode regular expressions and harness their power? In...
![Create Spinning Rays with CSS3 Animations & JavaScript]()
Thomas Fuchs, creator of script2 (scriptaculous' second iteration) and Zepto.js (mobile JavaScript framework), creates outstanding animated elements with JavaScript. He's a legend in his own right, and for good reason: his work has helped to inspire developers everywhere to drop Flash and opt...
![9 More Mind-Blowing WebGL Demos]()
With Firefox OS, asm.js, and the push for browser performance improvements, canvas and WebGL technologies are opening a world of possibilities. I featured 9 Mind-Blowing Canvas Demos and then took it up a level with 9 Mind-Blowing WebGL Demos, but I want to outdo...
I believe z++ should actually be zIndex++ … or you get fail ;)
This Friday’s dumbass mistake brought to you by…lack of sleep.
Nice idea, although it does not seem to work for me (tested in Chrome/Windows).
Either way, I think you should do pre-increment instead of post-increment, to assign the incremented value to the element:
el.setStyle('z-index', ++zIndex). That way you wont need to start the variable in 2 :)Is it just me or did your original referenced topic use
z-indexstacking as well?Have a look at the footer on my homepage. I have incorporated dragging functions with jquery for the 4 items. I had hover z-index replace at one point but removed it because it was not realistic with solid gears :) THX
@Brian Klepper: I meant 6 items.. :0
hi dav, is it possible to write draggable events into a db?