simulateddraganddropexample3.htm

来自「javascript高级程序设计 源码」· HTM 代码 · 共 47 行

HTM
47 行
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<html>
    <head>
        <title>Simulated Drag And Drop Example</title>
        <script type="text/javascript" src="eventutil.js"></script>
        <script type="text/javascript">
            
            var iDiffX = 0;
            var iDiffY = 0;
                   
            function handleMouseMove() {
                var oEvent = EventUtil.getEvent();
                var oDiv = document.getElementById("div1");
                oDiv.style.left = oEvent.clientX - iDiffX;
                oDiv.style.top = oEvent.clientY - iDiffY;
            }
                       
            function handleMouseDown() {
                var oEvent = EventUtil.getEvent();
                var oDiv = document.getElementById("div1");
                iDiffX = oEvent.clientX - oDiv.offsetLeft;
                iDiffY = oEvent.clientY - oDiv.offsetTop;
            
                EventUtil.addEventHandler(document.body, "mousemove", handleMouseMove);
                EventUtil.addEventHandler(document.body, "mouseup", handleMouseUp);
            }
            
            function handleMouseUp() {
                EventUtil.removeEventHandler(document.body, "mousemove", handleMouseMove);
                EventUtil.removeEventHandler(document.body, "mouseup", handleMouseUp);
            }
            
        </script>
        <style type="text/css">
            #div1 {
                background-color: red;
                height: 100px;
                width: 100px;
                position: absolute;
            }
        </style>
    </head>
    <body>
        <p>Try dragging the red square.</p>
        <p><div id="div1" onmousedown="handleMouseDown(event)"></div> </p>
    </body>
</html>

simulateddraganddropexample3.htm - 源码说明

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