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.
![5 More HTML5 APIs You Didn’t Know Existed]()
The HTML5 revolution has provided us some awesome JavaScript and HTML APIs. Some are APIs we knew we've needed for years, others are cutting edge mobile and desktop helpers. Regardless of API strength or purpose, anything to help us better do our job is a...
![Serving Fonts from CDN]()
For maximum performance, we all know we must put our assets on CDN (another domain). Along with those assets are custom web fonts. Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...
![Detect Vendor Prefix with JavaScript]()
Regardless of our position on vendor prefixes, we have to live with them and occasionally use them to make things work. These prefixes can be used in two formats: the CSS format (-moz-, as in -moz-element) and the JS format (navigator.mozApps). The awesome X-Tag project has...
![Rotate Elements with CSS Transformations]()
I've gone on a million rants about the lack of progress with CSS and how I'm happy that both JavaScript and browser-specific CSS have tried to push web design forward. One of those browser-specific CSS properties we love is CSS transformations. CSS transformations...
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?