<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Constrain Draggable - jQuery EasyUI Demo</title>
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<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
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<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
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<link rel="stylesheet" type="text/css" href="../demo.css">
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<script type="text/javascript" src="../../jquery.min.js"></script>
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<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
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</head>
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<body>
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<h2>Constrain Draggable</h2>
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<p>The draggable object can only be moved within its parent container.</p>
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<div style="margin:20px 0;"></div>
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<div class="easyui-panel" style="position:relative;overflow:hidden;width:500px;height:300px">
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<div class="easyui-draggable" data-options="onDrag:onDrag" style="width:100px;height:100px;background:#fafafa;border:1px solid #ccc;">
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</div>
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</div>
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<script>
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function onDrag(e){
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var d = e.data;
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if (d.left < 0){d.left = 0}
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if (d.top < 0){d.top = 0}
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if (d.left + $(d.target).outerWidth() > $(d.parent).width()){
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d.left = $(d.parent).width() - $(d.target).outerWidth();
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}
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if (d.top + $(d.target).outerHeight() > $(d.parent).height()){
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d.top = $(d.parent).height() - $(d.target).outerHeight();
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}
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}
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</script>
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</body>
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</html>
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