jQuery实现Div拖动+键盘控制综合效果的方法

前端技术 2023/09/03 JavaScript

本文实例讲述了jQuery实现Div拖动+键盘控制综合效果的方法。分享给大家供大家参考。具体实现方法如下：

复制代码 代码如下:

<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
<html xmlns=\"http://www.w3.org/1999/xhtml\">
<head>
<title>jQuery Div拖动+键盘控制综合效果</title>
<meta http-equiv=\"content-type\" content=\"text/html;charset=gb2312\">
<script src=\"/ajaxjs/jquery1.3.2.js\"></script>
</head>
<body>
预览时看不到效果，刷新一下即可
<div id=\"text\" style=\"width:120px;height:60px;background:#F06;position:absolute;left:500px;top:90px;cursor:move;\"></div>
<script type=\"text/javascript\">
var msgObj = document.getElementById(\'text\');
var posx = 0;
var posy = 0;
var moveable = false;
var MouseDownEvent = document.onmousedown;
var MouseMoveEvent = document.onmousemove;
var MouseUpEvent = document.onmouseup;
msgObj.onmousedown = function(evt) {
    var evt = evt||window.event;
    moveable = true;
    posy = evt.clientY-parseInt(msgObj.style.top);
    posx = evt.clientX-parseInt(msgObj.style.left);
    document.onmousemove = function(evt) {
        if (moveable) {
            var evt = evt||window.event;
            msgObj.style.left = evt.clientX - posx + \"px\";
            msgObj.style.top = evt.clientY - posy + \"px\";
        }
        change();
    };
    document.onmouseup = function () {
        if (moveable) {
            document.onmousemove = MouseMoveEvent;
            document.onmouseup = MouseUpEvent;
            moveable = false;
            posx = 0;
            posy = 0;
        }
    };
}
var v=1;
var a=0.9;
var h=document.documentElement.clientHeight;
function scroll(){
    var timer=setInterval(function(){
        v +=a;
        var top=(parseInt(msgObj.style.top)||0);
        if(top+v>h-70){
            if(v<2)clearInterval(timer);
            msgObj.style.top=h-70+\"px\";
            v=-v*0.5;  
        }else{
            msgObj.style.top=top+v+\"px\";
        }
        change();
    },10);
};
$(document).keyup(function(e){
    var e = e || window.event ;
    if(e.which == 13){
        scroll();  
    }
})
var x = 4 ;
var y = 4 ;
function newpro(){
    var Height = document.documentElement.clientHeight ;
    var Width = document.documentElement.clientWidth ;
    var newobj = document.createElement(\'div\');
    newobj.setAttribute(\'id\',\'bigbox\');
    newobj.style.position = \'absolute\';
    newobj.style.left = 20 +\"px\";
    newobj.style.top = 80 +\"px\";
    newobj.style.height = Height/x +\"px\" ;
    newobj.style.width = Width/y +\"px\" ;
    newobj.style.borderWidth = 1+\"px\";
    newobj.style.borderColor = \"#ff6500\";
    newobj.style.borderStyle = \'solid\' ;
    newobj.innerHTML=\'<div id=\"minbox\"></div>\';
    document.body.appendChild(newobj);
    change();
}
function change(){
    var minobj = document.getElementById(\'minbox\');
    minobj.style.position = \'absolute\';
    minobj.style.left = parseInt(msgObj.style.left)/x +\"px\";
    minobj.style.top = parseInt(msgObj.style.top)/y +\"px\";
    minobj.style.height = 20 +\"px\" ;
    minobj.style.width = 30 +\"px\" ;
    minobj.style.background = \"#F06\";
}
window.onload = function(){
    newpro();
}
</script>
</body>
</html>

希望本文所述对大家的jQuery程序设计有所帮助。

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