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<title>Example: Using Drop Based Coding</title>
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<h1>Example: Using Drop Based Coding</h1>
<div class="yui3-g">
<div class="yui3-u-3-4">
<div id="main">
<div class="content"><div class="intro">
<p>This example shows how to use the Drop Target events to code your application.</p>
</div>
<div class="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.yui3-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().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,
dragMode: 'intersect',
data: thisData
}).plug(Y.Plugin.DDConstrained, {
constrain2node: '#play'
});
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>
</div>
<h3 id="setting-up-the-html">Setting up the HTML</h3>
<p>First we need to create the HTML for the example.</p>
<pre class="code prettyprint"><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></pre>
<p>Now we give the HTML some CSS to make them visible.</p>
<pre class="code prettyprint">.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.yui3-dd-drop-over {
background-color: #FFA928;
}</pre>
<h3 id="setting-up-the-yui-instance">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>
<pre class="code prettyprint">YUI().use('dd-drop', 'dd-constrain');</pre>
<h3 id="making-the-nodes-draggable">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>
<pre class="code prettyprint">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' }
};</pre>
<p>Now we walk through the nodes and create a drag instance from each of them.</p>
<pre class="code prettyprint">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,
//Set the dragMode to intersect
dragMode: 'intersect',
//Attach the data here.
data: thisData
}).plug(Y.Plugin.DDConstrained, {
//Keep it inside the work area
constrain2node: '#play'
});
//Prevent the default end event (this moves the node back to its start position)
dd.on('drag:end', function(e) {
e.preventDefault();
});
});
});</pre>
<h3 id="setting-up-the-drop-target">Setting up the Drop Target</h3>
<p>Here we set up the Drop Target and assign a listener to it.</p>
<pre class="code prettyprint">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);
});</pre>
<h3 id="full-example-source">Full Example Source</h3>
<pre class="code prettyprint">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) {
var thisData = {};
Y.mix(thisData, data[v.get('id')]);
var dd = new Y.DD.Drag({
node: v,
dragMode: 'intersect',
data: thisData
}).plug(Y.Plugin.DDConstrained, {
constrain2node: '#play'
});
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);
});
});</pre>
</div>
</div>
</div>
<div class="yui3-u-1-4">
<div class="sidebar">
<div id="toc" class="sidebox">
<div class="hd">
<h2 class="no-toc">Table of Contents</h2>
</div>
<div class="bd">
<ul class="toc">
<li>
<a href="#setting-up-the-html">Setting up the HTML</a>
</li>
<li>
<a href="#setting-up-the-yui-instance">Setting up the YUI Instance</a>
</li>
<li>
<a href="#making-the-nodes-draggable">Making the Nodes draggable</a>
</li>
<li>
<a href="#setting-up-the-drop-target">Setting up the Drop Target</a>
</li>
<li>
<a href="#full-example-source">Full Example Source</a>
</li>
</ul>
</div>
</div>
<div class="sidebox">
<div class="hd">
<h2 class="no-toc">Examples</h2>
</div>
<div class="bd">
<ul class="examples">
<li data-description="A simple drag interaction that doesn't require a drop interaction.">
<a href="simple-drag.html">Simple Drag</a>
</li>
<li data-description="How to apply the Drag Plugin to a node.">
<a href="drag-plugin.html">Drag - Node plugin</a>
</li>
<li data-description="A simple proxy drag interaction that doesn't require a drop interaction.">
<a href="proxy-drag.html">Drag - Proxy</a>
</li>
<li data-description="How to constrain a draggable Node to another Node's region.">
<a href="constrained-drag.html">Drag - Constrained to a Region</a>
</li>
<li data-description="Using interaction groups, this example demonstrates how to tie into the Drag & Drop Utility's interesting moments to provide visual affordances for the current drag operation.">
<a href="groups-drag.html">Drag - Interaction Groups</a>
</li>
<li data-description="The use of the drag shim when dragging nodes over other troublesome nodes.">
<a href="shim-drag.html">Using the Drag Shim</a>
</li>
<li data-description="How to use the Drop Target events to code your application.">
<a href="drop-code.html">Using Drop Based Coding</a>
</li>
<li data-description="How you can use the DD Scroll plugin to scroll the browser window as you drag.">
<a href="winscroll.html">Window Scrolling</a>
</li>
<li data-description="How to use DD.Delegate to create a scalable solution which supports multiple draggable items.">
<a href="delegate.html">Drag Delegation</a>
</li>
<li data-description="Using DD.Delegate to support dragging multiple items and dropping them onto a Drop Target.">
<a href="delegate-drop.html">Drag Delegation with a Drop Target</a>
</li>
<li data-description="How to use Drag plugins with a DD Delegate based solution.">
<a href="delegate-plugins.html">Using Drag Plugins with Delegate</a>
</li>
<li data-description="This example shows how to make a sortable list using Custom Event Bubbling.">
<a href="list-drag.html">List Reorder w/Bubbling</a>
</li>
<li data-description="This example shows how to make a sortable list using Custom Event Bubbling and Node Scrolling.">
<a href="scroll-list.html">List Reorder w/Scrolling</a>
</li>
<li data-description="How to make an animated node a Drop target.">
<a href="anim-drop.html">Animated Drop Targets</a>
</li>
<li data-description="Example Photo Browser application.">
<a href="photo-browser.html">Photo Browser</a>
</li>
<li data-description="Portal style example using Drag & Drop Event Bubbling and Animation.">
<a href="portal-drag.html">Portal Style Example</a>
</li>
</ul>
</div>
</div>
<div class="sidebox">
<div class="hd">
<h2 class="no-toc">Examples That Use This Component</h2>
</div>
<div class="bd">
<ul class="examples">
<li data-description="Working with multiple YUI instances.">
<a href="../yui/yui-multi.html">Multiple Instances</a>
</li>
<li data-description="Use StyleSheet to adjust the CSS rules applying a page theme from user input">
<a href="../stylesheet/stylesheet-theme.html">Adjusting a Page Theme on the Fly</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="../assets/vendor/prettify/prettify-min.js"></script>
<script>prettyPrint();</script>
<script>
YUI.Env.Tests = {
examples: [],
project: '../assets',
assets: '../assets/dd',
name: 'drop-code',
title: 'Using Drop Based Coding',
newWindow: '',
auto: false
};
YUI.Env.Tests.examples.push('simple-drag');
YUI.Env.Tests.examples.push('drag-plugin');
YUI.Env.Tests.examples.push('proxy-drag');
YUI.Env.Tests.examples.push('constrained-drag');
YUI.Env.Tests.examples.push('groups-drag');
YUI.Env.Tests.examples.push('shim-drag');
YUI.Env.Tests.examples.push('drop-code');
YUI.Env.Tests.examples.push('winscroll');
YUI.Env.Tests.examples.push('delegate');
YUI.Env.Tests.examples.push('delegate-drop');
YUI.Env.Tests.examples.push('delegate-plugins');
YUI.Env.Tests.examples.push('list-drag');
YUI.Env.Tests.examples.push('scroll-list');
YUI.Env.Tests.examples.push('anim-drop');
YUI.Env.Tests.examples.push('photo-browser');
YUI.Env.Tests.examples.push('portal-drag');
YUI.Env.Tests.examples.push('yui-multi');
YUI.Env.Tests.examples.push('stylesheet-theme');
</script>
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