鼠标拖动DIV移动

直接上代码:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <style type="text/css">
        #myMessageDiv
        {
            position:absolute;
            left:100px;
            top:100px;
            width: 500px;
            height: 400px;
            border: 2px solid #C0C0C0;
            background-image: url("images/tmbg.png");
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div id="myMessageDiv">
    </div>
    </form>
</body>
</html>
<script type="text/javascript">
    //====================================div-move-start===================================
    var moving = 0;
    var _x, _y;
    $("#myMessageDiv").mousedown(function () {
        //debugger;
        this.setCapture();
        moving = 1; //开始移动标识
        _x = event.clientX;
        _y = event.clientY;
        //记录鼠标当前位置
    });
    $("#myMessageDiv").mouseup(function () {
        this.releaseCapture();
        moving = 0;
    });
    $("#myMessageDiv").mousemove(function () {
        if (moving == 1) {
            //debugger;
            //获取鼠标移动中的位置
            var x = event.clientX;
            var y = event.clientY;
            
            //为窗体赋新位置
            var X0 = parseInt($("#myMessageDiv").css("left"));
            var Y0 = parseInt($("#myMessageDiv").css("top"));
            $("#myMessageDiv").css("top", (Y0 + y - _y));
            $("#myMessageDiv").css("left", (X0 + x - _x));

            _x = x;
            _y = y;
        }
    });
    //====================================div-move-stop===================================
</script>

拖动js并不复杂

关键是通过它来认识setCapture(),releaseCapture()这两个函数,将他们去掉程序仍然能够运行,但是存在bug,有兴趣的朋友可以试试!

 

Javascript 鼠标捕获

鼠标捕获(setCapture)作用是将鼠标事件捕获到当前文档的指定的对象。这个对象会为当前应用程序或整个系统接收所有鼠标事件。

posted @ 2012-02-08 09:31  杨伟明  阅读(1430)  评论(0编辑  收藏  举报