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<title>YUI Library Examples: Drag & Drop: Interaction Groups</title>
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<div id="pagetitle"><h1>YUI Library Examples: Drag & Drop: Interaction Groups</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: Interaction Groups</h2>
<div id="example" class="promo">
<p>
<p>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.</p>
</p>
<div class="module example-container ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam">
<a href="groups-drag_clean.html" target="_blank">View example in new window.</a>
</p>
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<style>
.slot {
border: 2px solid #808080;
background-color: #CDCDCD;
color: #666666;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
z-index: 0;
}
.player {
border: 2px solid #808080;
color: #ffffff;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
top: 150px;
z-index: 1;
cursor: move;
}
#pt1 {
clear: both;
}
.bottom {
top: 50px;
}
#pt1, #pt2 {
background-color: #71241A;
}
#pb1, #pb2 {
background-color: #004C6D;
}
#pboth1, #pboth2 {
background-color: #FFA928;
}
#workarea {
position: relative;
height: 300px;
width: 500px;
}
#workarea .yui-dd-drop-active-valid {
border: 2px solid green;
}
#workarea .yui-dd-drop-over {
background-color: green;
}
#workarea .yui-dd-drop-active-invalid {
border: 2px solid red;
}
</style>
<div id="workarea">
<div class="slot" id="t1">1</div>
<div class="slot bottom" id="b1">3</div>
<div class="slot bottom" id="b2">4</div>
<div class="slot bottom" id="b3">5</div>
<div class="slot bottom" id="b4">6</div>
<div class="slot" id="t2">2</div>
<div class="player" id="pt1">1</div>
<div class="player" id="pt2">2</div>
<div class="player" id="pb1">3</div>
<div class="player" id="pb2">4</div>
<div class="player" id="pboth1">5</div>
<div class="player" id="pboth2">6</div>
</div>
<script>
var config = {base:"../../build/", timeout: 10000};
config.filter = 'debug';
YUI(config).use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
var slots = Y.Node.get('#workarea').queryAll('.slot');
Y.each(slots, function(v, k) {
var id = v.get('id'), groups = ['two'];
switch (id) {
case 't1':
case 't2':
groups = ['one'];
break;
}
var drop = new Y.DD.Drop({
node: v,
groups: groups
});
});
var players = Y.Node.get('#workarea').queryAll('.player');
Y.each(players, function(v, k) {
var id = v.get('id'), groups = ['one', 'two'];
switch (id) {
case 'pt1':
case 'pt2':
groups = ['one'];
break;
case 'pb1':
case 'pb2':
groups = ['two'];
break;
}
var drag = new Y.DD.Drag({
node: v,
groups: groups,
dragMode: 'intersect'
}).plug(Y.Plugin.DDProxy, {
moveOnEnd: false
}).plug(Y.Plugin.DDConstrained, {
constrain2node: '#workarea'
});
drag.on('drag:start', function() {
var p = this.get('dragNode'),
n = this.get('node');
n.setStyle('opacity', .25);
if (!this._playerStart) {
this._playerStart = this.nodeXY;
}
p.set('innerHTML', n.get('innerHTML'));
p.setStyles({
backgroundColor: n.getStyle('backgroundColor'),
color: n.getStyle('color'),
opacity: .65
});
});
drag.on('drag:end', function() {
var n = this.get('node');
n.setStyle('opacity', '1');
});
drag.on('drag:drophit', function(e) {
var xy = e.drop.get('node').getXY();
this.get('node').setXY(xy);
});
drag.on('drag:dropmiss', function(e) {
if (this._playerStart) {
this.get('node').setXY(this._playerStart);
this._playerStart = null;
}
});
});
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h3>Setting up the Work Area</h3>
<p>First we need to create the work area, players (drags) and slots (drops).</p>
<textarea name="code" class="HTML">
<div id="workarea">
<div class="slot" id="t1">1</div>
<div class="slot bottom" id="b1">3</div>
<div class="slot bottom" id="b2">4</div>
<div class="slot bottom" id="b3">5</div>
<div class="slot bottom" id="b4">6</div>
<div class="slot" id="t2">2</div>
<div class="player" id="pt1">1</div>
<div class="player" id="pt2">2</div>
<div class="player" id="pb1">3</div>
<div class="player" id="pb2">4</div>
<div class="player" id="pboth1">5</div>
<div class="player" id="pboth2">6</div>
</div>
</textarea>
<p>Now we give them some CSS to make them visible.</p>
<textarea name="code" class="CSS">
.slot {
border: 2px solid #808080;
background-color: #CDCDCD;
color: #666666;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
z-index: 0;
}
.player {
border: 2px solid #808080;
color: #ffffff;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
top: 150px;
z-index: 1;
cursor: move;
}
#pt1 {
clear: both;
}
.bottom {
top: 50px;
}
#pt1, #pt2 {
background-color: #71241A;
}
#pb1, #pb2 {
background-color: #004C6D;
}
#pboth1, #pboth2 {
background-color: #FFA928;
}
#workarea {
position: relative;
height: 300px;
width: 500px;
}
#workarea .yui-dd-drop-active-valid {
border: 2px solid green;
}
#workarea .yui-dd-drop-over {
background-color: green;
}
#workarea .yui-dd-drop-active-invalid {
border: 2px solid red;
}
</textarea>
<h4>Setting up the YUI Instance</h4>
<p>Now we need to create our YUI instance and tell it to load the <code>dd-drop</code>, <code>dd-proxy</code> and <code>dd-constrain</code> modules.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain');
</textarea>
<h4>Setting up the Drop Targets</h4>
<p>Now that we have a YUI instance with the requested modules, we are going to create our Drop Targets.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
//Get all the nodes with the class of .slot under #workarea
var slots = Y.Node.get('#workarea').queryAll('.slot');
//Loop through them
Y.each(slots, function(v, k) {
var id = v.get('id'), groups = ['two'];
//Assign them to different groups
switch (id) {
case 't1':
case 't2':
groups = ['one'];
break;
}
//Create the Drop object
var drop = new Y.DD.Drop({
node: v,
//With the new groups array as a config option
groups: groups
});
});
});
</textarea>
<h4>Setting up the Drag Nodes</h4>
<p>Now we need to create the Drag Nodes and assign them to the proper group.</p>
<textarea name="code" class="JScript">
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
//Snipped
var players = Y.Node.get('#workarea').queryAll('.player');
Y.each(players, function(v, k) {
var id = v.get('id'), groups = ['one', 'two'];
switch (id) {
case 'pt1':
case 'pt2':
groups = ['one'];
break;
case 'pb1':
case 'pb2':
groups = ['two'];
break;
}
var drag = new Y.DD.Drag({
node: v,
//Assign the Groups
groups: groups,
//Use Intersect Mode for the Target Calculations
dragMode: 'intersect',
}).plug(Y.Plugin.DDProxy, {
//We don't want the node to move on end drag
moveOnEnd: false
}).plug(Y.Plugin.DDConstrained, {
//Keep me inside the workarea
constrain2node: '#workarea'
});
});
</textarea>
<h4>Handling the Drops and Moments</h4>
<p>Now we are going to listen for Four Drag Events: <code>drag:start, drag:end, drag:drophit, drag:dropmiss</code></p>
<textarea name="code" class="JScript">
drag.on('drag:start', function() {
//In this event we setup some styles to make the nodes look pretty
var p = this.get('dragNode'),
n = this.get('node');
n.setStyle('opacity', .25);
if (!this._playerStart) {
this._playerStart = this.nodeXY;
}
//Put the Drag's HTML inside the proxy
p.set('innerHTML', n.get('innerHTML'));
//set some styles on the proxy
p.setStyles({
backgroundColor: n.getStyle('backgroundColor'),
color: n.getStyle('color'),
opacity: .65
});
});
drag.on('drag:end', function() {
//Undo some of the styles from the start
var n = this.get('node');
n.setStyle('opacity', '1');
});
drag.on('drag:drophit', function(e) {
//If we drop on a target, move to its position
var xy = e.drop.get('node').getXY();
this.get('node').setXY(xy);
});
drag.on('drag:dropmiss', function(e) {
//If we miss a target, move back to our start position
if (this._playerStart) {
this.get('node').setXY(this._playerStart);
this._playerStart = null;
}
});
</textarea>
<h4>Full Javascript Code</h4>
<textarea name="code" class="JScript">
YUI({base:"../../build/", timeout: 10000}).use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
var slots = Y.Node.get('#workarea').queryAll('.slot');
Y.each(slots, function(v, k) {
var id = v.get('id'), groups = ['two'];
switch (id) {
case 't1':
case 't2':
groups = ['one'];
break;
}
var drop = new Y.DD.Drop({
node: v,
groups: groups
});
});
var players = Y.Node.get('#workarea').queryAll('.player');
Y.each(players, function(v, k) {
var id = v.get('id'), groups = ['one', 'two'];
switch (id) {
case 'pt1':
case 'pt2':
groups = ['one'];
break;
case 'pb1':
case 'pb2':
groups = ['two'];
break;
}
var drag = new Y.DD.Drag({
node: v,
groups: groups,
dragMode: 'intersect'
}).plug(Y.Plugin.DDProxy, {
moveOnEnd: false
}).plug(Y.Plugin.DDConstrained, {
constrain2node: '#workarea'
});
drag.on('drag:start', function() {
var p = this.get('dragNode'),
n = this.get('node');
n.setStyle('opacity', .25);
if (!this._playerStart) {
this._playerStart = this.nodeXY;
}
p.set('innerHTML', n.get('innerHTML'));
p.setStyles({
backgroundColor: n.getStyle('backgroundColor'),
color: n.getStyle('color'),
opacity: .65
});
});
drag.on('drag:end', function() {
var n = this.get('node');
n.setStyle('opacity', '1');
});
drag.on('drag:drophit', function(e) {
var xy = e.drop.get('node').getXY();
this.get('node').setXY(xy);
});
drag.on('drag:dropmiss', function(e) {
if (this._playerStart) {
this.get('node').setXY(this._playerStart);
this._playerStart = null;
}
});
});
});
</textarea>
</div>
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<div id="examples" class="mod box4">
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<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 class='selected'><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><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">
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<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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