jQuery UI Draggable - Snap to element or grid
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<!doctype html>
<html lang="en">
<head>
<title>jQuery UI Draggable - Snap to element or grid</title>
<link type="text/css" href="js/themes/base/ui.all.css" rel="stylesheet" />
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript" src="js/ui/ui.core.js"></script>
<script type="text/javascript" src="js/ui/ui.draggable.js"></script>
<link type="text/css" href="js/demos.css" rel="stylesheet" />
<style type="text/css">
.draggable { width: 90px; height: 80px; padding: 5px; float: left; margin: 0 10px 10px 0; font-size: .9em; }
.ui-widget-header p, .ui-widget-content p { margin: 0; }
#snaptarget { height: 140px; }
</style>
<script type="text/javascript">
$(function() {
$("#draggable").draggable({ snap: true });
$("#draggable2").draggable({ snap: '.ui-widget-header' });
$("#draggable3").draggable({ snap: '.ui-widget-header', snapMode: 'outer' });
$("#draggable4").draggable({ grid: [20,20] });
$("#draggable5").draggable({ grid: [80, 80] });
});
</script>
</head>
<body>
<div class="demo">
<div id="snaptarget" class="ui-widget-header">
<p>I'm a snap target</p>
</div>
<br clear="both" />
<div id="draggable" class="draggable ui-widget-content">
<p>Default (snap: true), snaps to all other draggable elements</p>
</div>
<div id="draggable2" class="draggable ui-widget-content">
<p>I only snap to the big box</p>
</div>
<div id="draggable3" class="draggable ui-widget-content">
<p>I only snap to the outer edges of the big box</p>
</div>
<div id="draggable4" class="draggable ui-widget-content">
<p>I snap to a 20 x 20 grid</p>
</div>
<div id="draggable5" class="draggable ui-widget-content">
<p>I snap to a 80 x 80 grid</p>
</div>
</div><!-- End demo -->
<div class="demo-description">
<p>Snap the draggable to the inner or outer boundaries of a DOM element. Use the <code>snap</code>, <code>snapMode</code> (inner, outer, both), and <code>snapTolerance</code> (distance in pixels the draggable must be from the element when snapping is invoked) options. </p>
<p>Or snap the draggable to a grid. Set the dimensions of grid cells (height and width in pixels) with the <code>grid</code> option.</p>
</div><!-- End demo-description -->
</body>
</html>
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