Example: Using Drag Plugins with Delegate

Adding Plugins to a Delegate instance

DD.Delegate provides a reference to the dd instance so you can plug into the underlying dd with del.dd.plug(). This allows you to use DD plugins on a Delegate instance, as well as provides the ability to write plugins for Delegate itself.

Constrain Plugin

Here is how you would add the constrain plugin to a DD.Delegate instance.

YUI().use('dd-delegate', 'dd-constrain', function(Y) {
    var del = new Y.DD.Delegate({
        container: '#demo',
        nodes: 'li'
    });

    del.dd.plug(Y.Plugin.DDConstrained, {
        constrain2node: '#play'
    });
});

DDProxy Plugin

Here is how you would add the dd-proxy plugin to a DD.Delegate instance.

YUI().use('dd-delegate', 'dd-proxy', function(Y) {
    var del = new Y.DD.Delegate({
        container: '#demo',
        nodes: 'li'
    });

    del.dd.plug(Y.Plugin.DDProxy, {
        moveOnEnd: false,
        cloneNode: true
    });

});

Full Example Source

HTML

<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>

CSS

#demo {
}
#demo ul li {
    border: 1px solid black;
    background-color: #8DD5E7;
    cursor: move;
    margin: 3px;
    list-style-type: none;
    z-index: 2;
    width: 200px;
    height: 20px;
    padding: 2px;
    zoom: 1;
}
#play {
    border: 1px solid black;
    zoom: 1;
    padding: 2em;
}
#drop {
    border: 1px solid black;
    background-color: #eee;
    height: 50px;
    width: 200px;
    float: right;
    bottom: 50px;
    position: relative;
}
#drop strong {
    font-weight: bold;
}
#drop.yui3-dd-drop-over {
    background-color: #ccc;
}
#example-canvas {
    position: static;
}

Javascript

YUI().use('dd-delegate', 'dd-drop-plugin', 'dd-constrain', 'dd-proxy', function(Y) {
    var del = new Y.DD.Delegate({
        container: '#demo',
        nodes: 'li'
    });

    del.on('drag:start', function(e) {
        e.target.get('node').setStyle('opacity', '.5');
    });
    del.on('drag:end', function(e) {
        e.target.get('node').setStyle('opacity', '1');
    });
    
    del.dd.plug(Y.Plugin.DDConstrained, {
        constrain2node: '#play'
    });

    del.dd.plug(Y.Plugin.DDProxy, {
        moveOnEnd: false,
        cloneNode: true
    });

    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>');
    });
    

});