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<div id="pagetitle"><h1>YUI Library Examples: Drag & Drop: Animated Drop Targets</h1></div>
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<div id="bar-note"><p><strong>Note:</strong> This is YUI 3.x. Looking for <a href="http://developer.yahoo.com/yui/">YUI 2.x</a>?</p></div>
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<h2>Drag & Drop: Animated Drop Targets</h2>
<div id="example" class="promo">
<p>
<p>This example will show you how to make an animated node a Drop target.</p>
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<a href="anim-drop_source.html" target="_blank">View example in new window.</a>
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<h3>Setting up the HTML</h3>
<p>First we will create our HTML.</p>
<textarea name="code" class="HTML">
<div id="dock"></div>
<div id="drag">Drag #1</div>
<div id="anim1" class="anim">Anim #1</div>
<div id="anim2" class="anim">Anim #2</div>
<div id="anim3" class="anim">Anim #3</div>
<div id="anim4" class="anim">Anim #4</div>
<div id="anim5" class="anim">Anim #5</div>
</textarea>
<p>Now we give that HTML some CSS to make it visible.</p>
<textarea name="code" class="CSS">
.anim {
position: relative;
height: 50px;
width: 100px;
border: 1px solid black;
background-color: #00B8BF;
top: 100px;
}
#drag {
height: 50px;
width: 50px;
border: 1px solid black;
background-color: #004C6D;
color: white;
cursor: move;
z-index: 5;
}
#dock {
height: 600px;
width: 75px;
background-color: #D00050;
border: 1px solid black;
position: absolute;
top: 5px;
right: 0px;
}
.anim.yui-dd-drop-over {
background-color: #EDFF9F;
}
.anim.done {
background-color: white;
}
#drag1.yui-dd-drag-over {
opacity: .5;
filter: alpha(opacity=50);
}
</textarea>
<h3>Setting up the YUI Instance</h3>
<p>Now we need to create our YUI instance and tell it to load the <code>dd-drop</code>, <code>dd-plugin</code>, <code>dd-drop-plugin</code> and <code>anim</code> modules.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'anim', 'dd-plugin', 'dd-drop-plugin');
</textarea>
<h3>Making the Node draggable</h3>
<p>Now that we have a YUI instance with the modules loaded, we need to instantiate the <code>Drag</code> instance on this Node.</p>
<p>In this example we will be using Node plugins to accomplish our tasks.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'anim', 'dd-plugin', 'dd-drop-plugin', function(Y) {
//Get the node #drag
var d = Y.Node.get('#drag');
d.plug(Y.Plugin.Drag, { dragMode: 'intersect' });
});
</textarea>
<h3>Animating the Nodes</h3>
<p>Now we will setup the Animation sequence that we want to run.</p>
<textarea name="code" class="JScript">
//Get all the div's with the class anim
var anims = Y.Node.all('div.anim');
var counter = 0;
anims.each(function(v, k, items) {
//Get a reference to the Node instance
var a = v;
counter++;
//Add the FX plugin
a.plug(Y.Plugin.NodeFX);
//Add the Drop plugin
a.plug(Y.Plugin.Drop);
//Set the attributes on the animation
a.fx.setAttrs({
from: {
left: 0
},
to: {
curve: function() {
var points = [],
n = 10;
for (var i = 0; i < n; ++i) {
points.push([
Math.floor(Math.random()*Y.DOM.winWidth() - 60 - a.get('offsetWidth')),
Math.floor(Math.random()*Y.DOM.winHeight() - a.get('offsetHeight'))
]);
}
return points;
}
},
//Do the animation 20 times
iterations: 20,
//Alternate it so it "bounces" across the screen
direction: 'alternate',
//Give all of them a different duration so we get different speeds.
duration: ((counter * 1.75) + 1)
});
});
</textarea>
<h3>Making the Node A Target</h3>
<p>Using the <code>dd-drop-plugin</code>, we now need to make this animated Node a Drop Target.</p>
<p>To do that, we need to add the plugin after the fx plugin.</p>
<textarea name="code" class="JScript">
//Add the FX plugin
a.plug(Y.Plugin.NodeFX);
//Add the Drop plugin
a.plug(Y.Plugin.Drop);
</textarea>
<h3>Syncing the Target with the Animation</h3>
<p>The Drop Target needs to be in sync with the animation, since we are changing the height, width, top and left style.</p>
<p>We do this by adding a listener to the <code>tween</code> event on the animation instance.</p>
<textarea name="code" class="JScript">
//on tween of the original anim, we need to sync the drop's shim.
a.fx.on('tween', function() {
//Do we have an active Drag?
if (Y.DD.DDM.activeDrag) {
//Size this shim
this.drop.sizeShim();
//Force an over target check since we might not be moving the mouse.
Y.Lang.later(0, a, function() {
this.drop._handleTargetOver();
});
}
}, a);
</textarea>
<h3>Full example source</h3>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'anim', 'dd-plugin', 'dd-drop-plugin', function(Y) {
//Get the node #drag
var d = Y.Node.get('#drag');
d.plug(Y.plugin.Drag, { dragMode: 'intersect' });
//Get all the div's with the class anim
var anims = Y.Node.all('div.anim');
var counter = 0;
anims.each(function(v, k) {
//Get a reference to the Node instance
var a = v;
//Add the FX plugin
a.plug(Y.Plugin.NodeFX);
//Add the Drop plugin
a.plug(Y.Plugin.Drop);
//Set the attributes on the animation
a.fx.setAttrs({
from: {
left: 0
},
to: {
curve: function() {
var points = [],
n = 10;
for (var i = 0; i < n; ++i) {
points.push([
Math.floor(Math.random()*Y.DOM.winWidth() - 60 - a.get('offsetWidth')),
Math.floor(Math.random()*Y.DOM.winHeight() - a.get('offsetHeight'))
]);
}
return points;
}
},
//Do the animation 20 times
iterations: 20,
//Alternate it so it "bounces" across the screen
direction: 'alternate',
//Give all of them a different duration so we get different speeds.
duration: ((counter * 1.75) + 1)
});
//When this drop is entered, pause the fx
a.drop.on('drop:enter', function() {
this.fx.pause();
}, a);
//When the drop is exited, run the fx again
a.drop.on('drop:exit', function() {
this.fx.run();
}, a);
//When a drop is on the node, do something special
a.drop.on('drop:hit', function(e) {
//Stop the animation
this.fx.stop();
//remove the tween listener
this.fx.unsubscribeAll('tween');
//move it to the dock
this.fx.setAttrs({
from: {
opacity: 1
},
to: {
height: 50,
width: 50,
left: function() {
var dW = Y.Node.get('body').get('viewportRegion').right;
return ((dW - 60)); //Minus 60 for the dock
},
top: 15,
opacity: .5
},
direction: 'normal',
iterations: 1,
duration: .5,
//We are using reverse above for the "bouncing", reset it here.
reverse: false
});
//On end, add a class and destroy the target
this.fx.on('end', function() {
this.drop.get('node').addClass('done');
this.drop.destroy();
}, this);
//Run this animation
this.fx.run();
//others that were dropped on.
Y.each(e.others, function(v, k) {
var node = v.get('node');
node.fx.run();
});
}, a);
//on tween of the original anim, we need to sync the drop's shim.
a.fx.on('tween', function() {
//Do we have an active Drag?
if (Y.DD.DDM.activeDrag) {
//Size this shim
this.drop.sizeShim();
//Force an over target check since we might not be moving the mouse.
Y.Lang.later(0, a, function() {
this.drop._handleTargetOver();
});
}
}, a);
a.fx.run();
});
});
</textarea>
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<h4>
Drag & Drop Examples:</h4>
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<ul>
<li><a href='../dd/simple-drag.html'>Simple Drag</a></li><li><a href='../dd/drag-plugin.html'>Drag Node Plugin</a></li><li><a href='../dd/proxy-drag.html'>Proxy Drag</a></li><li><a href='../dd/constrained-drag.html'>Drag Constrained to a Region</a></li><li><a href='../dd/groups-drag.html'>Interaction Groups</a></li><li><a href='../dd/shim-drag.html'>Using the Drag Shim</a></li><li class='selected'><a href='../dd/anim-drop.html'>Animated Drop Targets</a></li><li><a href='../dd/drop-code.html'>Drop Based Coding</a></li><li><a href='../dd/winscroll.html'>Window Scrolling</a></li><li><a href='../dd/list-drag.html'>List reorder w/Bubbling</a></li><li><a href='../dd/scroll-list.html'>List reorder w/Scrolling</a></li><li><a href='../dd/portal-drag.html'>Portal Style Example</a></li><li><a href='../dd/photo-browser.html'>Photo Browser</a></li> </ul>
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<h4>More Drag & Drop Resources:</h4>
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