This example shows how to create multiple draggable items efficiently, still allowing for Drop Targets.
- Item #1
- Item #2
- Item #3
- Item #4
- Item #5
- Item #6
- Item #7
- Item #8
- Item #9
- Item #10
Setting up the Delegate container and items
First we need to create an HTML Node to act as the delegate container and give it some nodes to make draggable.
<div id="play">
<div id="demo">
<ul>
<li>Item #1</li>
<li>Item #2</li>
<li>Item #3</li>
<li>Item #4</li>
<li>Item #5</li>
<li>Item #6</li>
<li>Item #7</li>
<li>Item #8</li>
<li>Item #9</li>
<li>Item #10</li>
</ul>
</div>
<div id="drop">Drop on me</div>
</div>
Now we give them some CSS to make them visible.
#demo {
width: 200px;
}
#demo ul li {
border: 1px solid black;
background-color: #8DD5E7;
cursor: move;
margin: 3px;
list-style-type: none;
z-index: 2;
zoom: 1;
}
#play {
position: relative;
zoom: 1;
}
#drop {
border: 1px solid black;
background-color: #eee;
height: 50px;
width: 200px;
position: absolute;
bottom: 5px;
right: 5px;
zoom: 1;
}
#drop strong {
font-weight: bold;
}
#drop.yui3-dd-drop-over {
background-color: #ccc;
}
Setting up the YUI Instance
Now we need to create our YUI instance and tell it to load the dd-delegate module.
YUI().use('dd-delegate', 'dd-drop-plugin');
Making the Nodes draggable
Now that we have a YUI instance with the dd-delegate module, we need to instantiate the Delegate instance on this container and nodes.
YUI().use('dd-delegate', 'dd-drop-plugin', function(Y) {
var del = new Y.DD.Delegate({
container: '#demo',
nodes: 'li'
});
});
Listening to some events
The Delegate object is a bubble target for the DD.Drag instances. So you can listen on it for all drag related events.
YUI().use('dd-delegate', 'dd-drop-plugin', function(Y) {
var del = new Y.DD.Delegate({
container: '#demo',
nodes: 'li'
});
del.on('drag:end', function(e) {
del.get('currentNode').setStyles({
top: 0,
left: 0
});
});
});
Adding a Drop Target
Now we can add a normal Drop Target to the page.
var drop = Y.one('#drop').plug(Y.Plugin.Drop);
Once that is created, we can add a drop:hit listener and manipulate the drag instance as we normally would.
var drop = Y.one('#drop').plug(Y.Plugin.Drop);
drop.drop.on('drop:hit', function(e) {
drop.set('innerHTML', 'You dropped: <strong>' + e.drag.get('node').get('innerHTML') + '</strong>');
});
Full Javascript Source
YUI().use('dd-delegate', 'dd-drop-plugin', function(Y) {
var del = new Y.DD.Delegate({
container: '#demo',
nodes: 'li'
});
del.on('drag:end', function(e) {
del.get('currentNode').setStyles({
top: 0,
left: 0
});
});
var drop = Y.one('#drop').plug(Y.Plugin.Drop);
drop.drop.on('drop:hit', function(e) {
drop.set('innerHTML', 'You dropped: <strong>' + e.drag.get('node').get('innerHTML') + '</strong>');
});
});