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<div id="pagetitle"><h1>YUI Library Examples: Drag & Drop: Drop Based Coding</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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<div class="yui-u first example" id="main">
<h2>Drag & Drop: Drop Based Coding</h2>
<div id="example" class="promo">
<p>
<p>This example shows how to use the Drop Target events to code your application.</p>
</p>
<div class="module example-container ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam">
<a href="drop-code_clean.html" target="_blank">View example in new window.</a>
</p>
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<style>
.drag {
height: 50px;
width: 50px;
border: 1px solid black;
background-color: #004C6D;
color: white;
cursor: move;
float: left;
margin: 4px;
z-index: 2;
}
#play {
border: 1px solid black;
height: 300px;
position: relative;
}
#drop {
position: absolute;
bottom: 5px;
right: 5px;
border: 1px solid black;
background-color: #8DD5E7;
height: 75px;
width: 65%;
z-index: 1;
}
#drop p {
margin: 1em;
}
#drop p strong {
font-weight: bold;
}
#drop.yui-dd-drop-over {
background-color: #FFA928;
}
</style>
<div id="play">
<div id="drag1" class="drag">Drag #1</div>
<div id="drag2" class="drag">Drag #2</div>
<div id="drag3" class="drag">Drag #3</div>
<div id="drag4" class="drag">Drag #4</div>
<div id="drag5" class="drag">Drag #5</div>
<div id="drop"></div>
</div>
<script>
YUI({base:"../../build/", timeout: 10000}).use('dd-drop', 'dd-constrain', function(Y) {
var data = {
'drag1': { color: 'white', size: 'x-small', price: '$5.00' },
'drag2': { color: 'blue', size: 'small', price: '$6.00' },
'drag3': { color: 'green', size: 'medium', price: '$7.00' },
'drag4': { color: 'red', size: 'large', price: '$10.00' },
'drag5': { color: 'purple', size: 'x-large', price: '$15.00' }
};
var drags = Y.Node.all('#play div.drag');
drags.each(function(v, k) {
var thisData = {};
Y.mix(thisData, data[v.get('id')]);
var dd = new Y.DD.Drag({
node: v,
constrain2node: '#play',
dragMode: 'intersect',
data: thisData
});
dd.on('drag:end', function(e) {
e.preventDefault();
});
});
var drop = new Y.DD.Drop({
node: '#drop'
});
drop.on('drop:hit', function(e) {
var drag = e.drag;
var data = drag.get('data');
var out = ['id: ' + drag.get('node').get('id')];
Y.each(data, function(v, k) {
out[out.length] = k + ': ' + v;
});
var str = '<p><strong>Dropped</strong>: ' + out.join(', ') + '</p>';
this.get('node').set('innerHTML', str);
});
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h3>Setting up the HTML</h3>
<p>First we need to create the HTML for the example.</p>
<textarea name="code" class="HTML">
<div id="play">
<div id="drag1" class="drag">Drag #1</div>
<div id="drag2" class="drag">Drag #2</div>
<div id="drag3" class="drag">Drag #3</div>
<div id="drag4" class="drag">Drag #4</div>
<div id="drag5" class="drag">Drag #5</div>
<div id="drop"></div>
</div>
</textarea>
<p>Now we give the HTML some CSS to make them visible.</p>
<textarea name="code" class="CSS">
.drag {
height: 50px;
width: 50px;
border: 1px solid black;
background-color: #004C6D;
color: white;
cursor: move;
float: left;
margin: 4px;
z-index: 2;
}
#play {
border: 1px solid black;
height: 300px;
position: relative;
}
#drop {
position: absolute;
bottom: 5px;
right: 5px;
border: 1px solid black;
background-color: #8DD5E7;
height: 75px;
width: 65%;
z-index: 1;
}
#drop p {
margin: 1em;
}
#drop p strong {
font-weight: bold;
}
#drop.yui-dd-drop-over {
background-color: #FFA928;
}
</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> and <code>dd-constrain</code> modules.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-constrain');
</textarea>
<h3>Making the Nodes draggable</h3>
<p>Now that we have a YUI instance with the <code>dd-drop</code> module, we need to instantiate the <code>Drag</code> instance on each Drag Node.</p>
<p>In this example we are using the data config option of the drag to associate data with this Drag instance.</p>
<p>So we have set up an object literal containing information about our drag items.</p>
<textarea name="code" class="JScript">
var data = {
'drag1': { color: 'white', size: 'x-small', price: '$5.00' },
'drag2': { color: 'blue', size: 'small', price: '$6.00' },
'drag3': { color: 'green', size: 'medium', price: '$7.00' },
'drag4': { color: 'red', size: 'large', price: '$10.00' },
'drag5': { color: 'purple', size: 'x-large', price: '$15.00' }
};
</textarea>
<p>Now we walk through the nodes and create a drag instance from each of them.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-constrain', function(Y) {
//Data to attach to each drag object
var data = {
'drag1': { color: 'white', size: 'x-small', price: '$5.00' },
'drag2': { color: 'blue', size: 'small', price: '$6.00' },
'drag3': { color: 'green', size: 'medium', price: '$7.00' },
'drag4': { color: 'red', size: 'large', price: '$10.00' },
'drag5': { color: 'purple', size: 'x-large', price: '$15.00' }
};
//Get all the divs with the class drag
var drags = Y.Node.all('#play div.drag');
//Walk through each one
drags.each(function(v, k) {
//scope a local var for the data
var thisData = {};
//Using Y.mix to break this data from the data above
Y.mix(thisData, data[v.get('id')]);
//Create the new Drag Instance
var dd = new Y.DD.Drag({
//Give it the node
node: v,
//Keep it inside the work area
constrain2node: '#play',
//Set the dragMode to intersect
dragMode: 'intersect',
//Attach the data here..
data: thisData
});
//Prevent the default end event (this moves the node back to it's start position)
dd.on('drag:end', function(e) {
e.preventDefault();
});
});
});
</textarea>
<h3>Setting up the Drop Target</h3>
<p>Here we set up the Drop Target and assign a listener to it.</p>
<textarea name="code" class="JScript">
var drop = new Y.DD.Drop({
node: '#drop'
});
//Listen for a drop:hit on this target
drop.on('drop:hit', function(e) {
//Now we get the drag instance that triggered the drop hit
var drag = e.drag;
//get the data from it
var data = drag.get('data');
//Do something with the data
var out = ['id: ' + drag.get('node').get('id')];
Y.each(data, function(v, k) {
out[out.length] = k + ': ' + v;
});
var str = '<p><strong>Dropped</strong>: ' + out.join(', ') + '</p>';
this.get('node').set('innerHTML', str);
});
</textarea>
<h3>Full Example Source</h3>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-constrain', function(Y) {
var data = {
'drag1': { color: 'white', size: 'x-small', price: '$5.00' },
'drag2': { color: 'blue', size: 'small', price: '$6.00' },
'drag3': { color: 'green', size: 'medium', price: '$7.00' },
'drag4': { color: 'red', size: 'large', price: '$10.00' },
'drag5': { color: 'purple', size: 'x-large', price: '$15.00' }
};
var drags = Y.Node.all('#play div.drag');
drags.each(function(v, k, items) {
var thisData = {};
Y.mix(thisData, data[v.get('id')]);
var dd = new Y.DD.Drag({
node: items.item(k),
constrain2node: '#play',
dragMode: 'intersect',
data: thisData
});
//Prevent the default end event (this moves the node back to it's start position)
dd.on('drag:end', function(e) {
e.preventDefault();
});
});
var drop = new Y.DD.Drop({
node: '#drop'
});
drop.on('drop:hit', function(e) {
var drag = e.drag;
var data = drag.get('data');
var out = ['id: ' + drag.get('node').get('id')];
Y.each(data, function(v, k) {
out[out.length] = k + ': ' + v;
});
var str = '<p><strong>Dropped</strong>: ' + out.join(', ') + '</p>';
this.get('node').set('innerHTML', str);
});
});
</textarea>
</div>
<div class="yui-u sidebar">
<div id="examples" class="mod box4">
<div class="hd">
<h4>
Drag & Drop Examples:</h4>
</div>
<div class="bd">
<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><a href='../dd/anim-drop.html'>Animated Drop Targets</a></li><li class='selected'><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>
</div>
</div>
<div class="mod box4">
<div class="hd">
<h4>More Drag & Drop Resources:</h4>
</div>
<div class="bd">
<ul>
<!-- <li><a href="http://developer.yahoo.com/yui/dd/">User's Guide</a> (external)</li> -->
<li><a href="../../api/module_dd.html">API Documentation</a></li>
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