Edit D:\rfid\libsystem\third-party\jquery-easyui-1.5.3\demo\draggable\constrain.html
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Constrain Draggable - jQuery EasyUI Demo</title> <link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css"> <link rel="stylesheet" type="text/css" href="../../themes/icon.css"> <link rel="stylesheet" type="text/css" href="../demo.css"> <script type="text/javascript" src="../../jquery.min.js"></script> <script type="text/javascript" src="../../jquery.easyui.min.js"></script> </head> <body> <h2>Constrain Draggable</h2> <p>The draggable object can only be moved within its parent container.</p> <div style="margin:20px 0;"></div> <div class="easyui-panel" style="position:relative;overflow:hidden;width:500px;height:300px"> <div class="easyui-draggable" data-options="onDrag:onDrag" style="width:100px;height:100px;background:#fafafa;border:1px solid #ccc;"> </div> </div> <script> function onDrag(e){ var d = e.data; if (d.left < 0){d.left = 0} if (d.top < 0){d.top = 0} if (d.left + $(d.target).outerWidth() > $(d.parent).width()){ d.left = $(d.parent).width() - $(d.target).outerWidth(); } if (d.top + $(d.target).outerHeight() > $(d.parent).height()){ d.top = $(d.parent).height() - $(d.target).outerHeight(); } } </script> </body> </html>
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