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Phraseanet/www/include/jslibs/yui2.8/examples/dragdrop/dd-proxy.html
2011-02-16 16:09:48 +01:00

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<title>YUI Library Examples: Drag &amp; Drop: Using a Proxy Element</title>
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<script type="text/javascript" src="../../build/event/event-min.js"></script>
<script type="text/javascript" src="../../build/dragdrop/dragdrop-min.js"></script>
<script type="text/javascript" src="../../build/element/element-min.js"></script>
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.dd-demo {
position:relative;
border:4px solid #666;
text-align:center;
color:#fff;
cursor:move;
height:60px;
width:60px;
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.dd-demo-em {
border:4px solid purple;
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background-color:#6D739A;top:0px; left:0px;
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#dd-demo-2 {
background-color:#566F4E;top:50px; left:100px; height: 80px; width: 80px;
}
#dd-demo-3 {
background-color:#7E5B60;top:-150px; left:200px; height: 100px; width: 100px;
}
#dd-demo-3-proxy {
position: absolute;
visibility: hidden;
color: #fff;
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background-color:#000;
height:100px;
width: 100px;
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//enable passthrough of errors from YUI Event:
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
YAHOO.util.Event.throwErrors = true;
}
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<div id="pagetitle"><h1>YUI Library Examples: Drag &amp; Drop: Using a Proxy Element</h1></div>
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<div class="yui-ge">
<div class="yui-u first example">
<div class="promo">
<h1>Drag &amp; Drop: Using a Proxy Element</h1>
<div class="exampleIntro">
<p>This example demonstrates drag and drop using a proxy element.</p>
</div>
<div class="example-container module ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="dd-proxy_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="dd-demo-1" class="dd-demo"></div>
<div id="dd-demo-2" class="dd-demo"></div>
<div id="dd-demo-3" class="dd-demo"></div>
<div id="dd-demo-3-proxy">Custom</div>
<script type="text/javascript">
(function() {
var dd, dd2, dd3;
YAHOO.util.Event.onDOMReady(function() {
// The first two instances will share a proxy
// element, created automatically by the utility.
// This element will be resized at drag time so
// that it matches the size of the source element.
// It is configured by default to have a 2 pixel
// grey border.
dd = new YAHOO.util.DDProxy("dd-demo-1");
dd2 = new YAHOO.util.DDProxy("dd-demo-2");
// The third instance has a dedicated custom proxy
dd3 = new YAHOO.util.DDProxy("dd-demo-3", "default", {
// Define a custom proxy element. It will be
// created if not already on the page.
dragElId: "dd-demo-3-proxy",
// When a drag starts, the proxy is normally
// resized. Turn this off so we can keep a
// fixed sized proxy.
resizeFrame: false
});
});
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Drag and Drop Proxies</h2>
<p>The <a href="http://developer.yahoo.com/yui/dragdrop/">YUI Drag &amp; Drop Utility</a> lets you make HTML elements draggable.</p>
<p>For this example, we will enable drag and drop for the three <code>&lt;div&gt;</code> elements.
However, instead of dragging the elements around, a proxy element is created and moved instead.
Many implmentations can benefit from the use of the proxy element because it avoids positioning
complications that can occur when changing the css styles of the source element. Proxy drags
also perform better than dragging the element directly.
</p>
<p>Create the <code>demo</code> elements:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
<div id="dd-demo-1" class="dd-demo"></div>
<div id="dd-demo-2" class="dd-demo"></div>
<div id="dd-demo-3" class="dd-demo"></div>
<div id="dd-demo-3-proxy">Custom</div>
</textarea>
<p>Now we create the instances of <code>YAHOO.util.DDProxy</code>, passing the element ids or references for our demo elements.</p>
<textarea name="code" class="JScript" cols="60" rows="1">
<script type="text/javascript">
(function() {
var dd, dd2, dd3;
YAHOO.util.Event.onDOMReady(function() {
// The first two instances will share a proxy
// element, created automatically by the utility.
// This element will be resized at drag time so
// that it matches the size of the source element.
// It is configured by default to have a 2 pixel
// grey border.
dd = new YAHOO.util.DDProxy("dd-demo-1");
dd2 = new YAHOO.util.DDProxy("dd-demo-2");
// The third instance has a dedicated custom proxy
dd3 = new YAHOO.util.DDProxy("dd-demo-3", "default", {
// Define a custom proxy element. It will be
// created if not already on the page.
dragElId: "dd-demo-3-proxy",
// When a drag starts, the proxy is normally
// resized. Turn this off so we can keep a
// fixed sized proxy.
resizeFrame: false
});
});
})();
</script>
</textarea>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?dragdrop&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
</div>
<div class="yui-u">
<div id="loggerModule" class="yui-skin-sam">
<h3 class="firstContent">YUI Logger Output:</h3>
<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p>
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="dd-proxy_log.html">Reload with logging<br />
and debugging enabled.</a></span></span></p></div>
</div>
<div id="examples">
<h3>Drag &amp; Drop Examples:</h3>
<div id="exampleToc">
<ul>
<li><a href='../dragdrop/dd-basic.html'>Basic Drag and Drop</a></li><li><a href='../dragdrop/dd-handles.html'>Using Handles</a></li><li><a href='../dragdrop/dd-ontop.html'>Dragged Element on Top</a></li><li class='selected'><a href='../dragdrop/dd-proxy.html'>Using a Proxy Element</a></li><li><a href='../dragdrop/dd-reorder.html'>Reordering a List</a></li><li><a href='../dragdrop/dd-groups.html'>Using Interaction Groups</a></li><li><a href='../dragdrop/dd-circle.html'>Custom Click Validator</a></li><li><a href='../dragdrop/dd-region.html'>Staying in a Region</a></li><li><a href='../dragdrop/dd-shim.html'>Using the Drag Shim</a></li><li><a href='../datatable/dt_ddrows.html'>Reorder Rows with Drag and Drop (included with examples for DataTable Control)</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Drag &amp; Drop Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/dragdrop/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_dragdrop.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/dragdrop.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
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