木子屋 Dnawo's BLOG

站长网拖拽效果完整Js

👤 dnawo 📅 2008-02-23 👁 5411 👍 0 💬 0 🔄 来源：本站原创
今天在逛站长网时无意中发现站长工具页(http://tool.admin5.com/)各类工具位置支持拖拽，一时兴起研究了下脚本，下边是D下来的脚本(稍做了修改

HTML
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>站长网拖拽效果完整Js</title>
<style type="text/css">
#page{width:970px; font-size:14px;}
#page .col{ width:475px; margin-right:10px; float:left;}
#page .toolbox{ border:1px solid #C5D7EF; border-top-color:#7AA5D6; margin-bottom:10px;}
#page .title{line-height:22px; font-size:14px; padding:0 5px; background:#E5ECF9; border-bottom:1px solid #C5D7EF; color:#36c; font-weight:bold;}
.control{float:right; margin-top:4px;cursor:hand; font-weight:bold;}
.inner {height:36px; margin:4px;}
.dm{height:1px; visibility:hidden;}
</style>
<script language="javascript">
var Util = new Object();
Util.getUserAgent = navigator.userAgent;
Util.isGecko = Util.getUserAgent.indexOf("Gecko") != -1;
Util.isOpera = Util.getUserAgent.indexOf("Opera") != -1;

Util.getOffset = function (el, isLeft) {
    var retValue = 0;
    while (el != null) {
        retValue += el["offset" + (isLeft ? "Left" : "Top")];
        el = el.offsetParent;
    }
    return retValue;
};

Util.bindFunction = function (el, fucName) {
    return function () {
        return el[fucName].apply(el, arguments);
    };
};

Util.re_calcOff = function (el) {
    for (var i = 0; i < Util.dragArray.length; i++) {
        var ele = Util.dragArray[i];
        ele.elm.pagePosLeft = Util.getOffset(ele.elm, true);
        ele.elm.pagePosTop = Util.getOffset(ele.elm, false);
    }
    var nextSib = el.elm.nextSibling;
    while (nextSib) {
        nextSib.pagePosTop -= el.elm.offsetHeight;
        nextSib = nextSib.nextSibling;
    }
};

Util.hide = function () {
    Util.rootElement.style.display = "none";
};

Util.show = function () {
    Util.rootElement.style.display = "";
};

ghostElement = null;

getGhostElement = function () {
    if (!ghostElement) {
        ghostElement = document.createElement("DIV");
        ghostElement.className = "toolbox";
        ghostElement.backgroundColor = "";
        ghostElement.style.border = "2px dashed #aaa";
        ghostElement.innerHTML = " ";
    }
    return ghostElement;
};

function draggable(el) {
    this._dragStart = start_Drag;
    this._drag = when_Drag;
    this._dragEnd = end_Drag;
    this._afterDrag = after_Drag;
    this.isDragging = false;
    this.elm = el;
    this.header = document.getElementById(el.id + "_h");
    this.hasIFrame = this.elm.getElementsByTagName("IFRAME").length > 0;
    if (this.header) {
        this.header.style.cursor = "move";
        Drag.init(this.header, this.elm);
        this.elm.onDragStart = Util.bindFunction(this, "_dragStart");
        this.elm.onDrag = Util.bindFunction(this, "_drag");
        this.elm.onDragEnd = Util.bindFunction(this, "_dragEnd");
    }
};

function start_Drag() {
    Util.re_calcOff(this);
    this.origNextSibling = this.elm.nextSibling;
    var _ghostElement = getGhostElement();
    var offH = this.elm.offsetHeight;
    if (Util.isGecko) {
        offH -= parseInt(_ghostElement.style.borderTopWidth) * 2;
    }
    var offW = this.elm.offsetWidth-4;
    var offLeft = Util.getOffset(this.elm, true);
    var offTop = Util.getOffset(this.elm, false);
    Util.hide();
    this.elm.style.width = offW+2 + "px";
    _ghostElement.style.height = offH-4 + "px";
    this.elm.parentNode.insertBefore(_ghostElement, this.elm.nextSibling);
    this.elm.style.position = "absolute";
    this.elm.style.zIndex = 100;
    this.elm.style.left = offLeft + "px";
    this.elm.style.top = offTop + "px";
    Util.show();
    this.isDragging = false;
    return false;
};

function when_Drag(clientX, clientY) {
    if (!this.isDragging) {
        this.elm.style.filter = "alpha(opacity=70)";
        this.elm.style.opacity = 0.7;
        this.isDragging = true;
    }
    var found = null;
    var max_distance = 100000000;
    for (var i = 0; i < Util.dragArray.length; i++) {
        var ele = Util.dragArray[i];
        var distance = Math.sqrt(Math.pow(clientX - ele.elm.pagePosLeft, 2) + Math.pow(clientY - ele.elm.pagePosTop, 2));
        if (ele == this) {
            continue;
        }
        if (isNaN(distance)) {
            continue;
        }
        if (distance < max_distance) {
            max_distance = distance;
            found = ele;
        }
    }
    var _ghostElement = getGhostElement();
    if (found != null && _ghostElement.nextSibling != found.elm) {
        found.elm.parentNode.insertBefore(_ghostElement, found.elm);
        if (Util.isOpera) {
            document.body.style.display = "none";
            document.body.style.display = "";
        }
    }
};

function end_Drag() {
    if (this._afterDrag()) {
    }
    return true;
};

function after_Drag() {
    var returnValue = false;
    Util.hide();
    this.elm.style.position = "";
    this.elm.style.width = "";
    this.elm.style.zIndex = "";
    this.elm.style.filter = "";
    this.elm.style.opacity = "";
    var ele = getGhostElement();
    if (ele.nextSibling != this.origNextSibling) {
        ele.parentNode.insertBefore(this.elm, ele.nextSibling);
        returnValue = true;
    }
    ele.parentNode.removeChild(ele);
    Util.show();
    if (Util.isOpera) {
        document.body.style.display = "none";
        document.body.style.display = "";
    }
    return returnValue;
};

var Drag = {
	obj:null, 
	init:function (elementHeader, element) {
    	elementHeader.onmousedown = Drag.start;
	    elementHeader.obj = element;
	    if (isNaN(parseInt(element.style.left))) {
	        element.style.left = "0px";
	    }
	    if (isNaN(parseInt(element.style.top))) {
	        element.style.top = "0px";
	    }
	    element.onDragStart = new Function();
	    element.onDragEnd = new Function();
	    element.onDrag = new Function();
	},
	start:function (event) {
	    var element = Drag.obj = this.obj;
	    event = Drag.fixE(event);
	    if (event.which != 1) {
	        return true;
    	}
	    element.onDragStart();
	    element.lastMouseX = event.clientX;
	    element.lastMouseY = event.clientY;
	    document.onmouseup = Drag.end;
	    document.onmousemove = Drag.drag;
	    return false;
	}, 
	drag:function (event) {
	    event = Drag.fixE(event);
	    if (event.which == 0) {
	        return Drag.end();
    	}
	    var element = Drag.obj;
	    var _clientX = event.clientY;
	    var _clientY = event.clientX;
	    if (element.lastMouseX == _clientY && element.lastMouseY == _clientX) {
	        return false;
	    }
	    var _lastX = parseInt(element.style.top);
	    var _lastY = parseInt(element.style.left);
	    var newX, newY;
	    newX = _lastY + _clientY - element.lastMouseX;
	    newY = _lastX + _clientX - element.lastMouseY;
	    element.style.left = newX + "px";
	    element.style.top = newY + "px";
	    element.lastMouseX = _clientY;
	    element.lastMouseY = _clientX;
	    element.onDrag(newX, newY);
	    return false;
	},
	end:function (event) {
	    event = Drag.fixE(event);
	    document.onmousemove = null;
	    document.onmouseup = null;
	    var _onDragEndFuc = Drag.obj.onDragEnd();
	    Drag.obj = null;
	    return _onDragEndFuc;
	}, 
	fixE:function (ig_) {
	    if (typeof ig_ == "undefined") {
	        ig_ = window.event;
	    }
	    if (typeof ig_.layerX == "undefined") {
	        ig_.layerX = ig_.offsetX;
	    }
	    if (typeof ig_.layerY == "undefined") {
	        ig_.layerY = ig_.offsetY;
	    }
	    if (typeof ig_.which == "undefined") {
	        ig_.which = ig_.button;
	    }
    	return ig_;
	}
};

function $(element) {
	var elements = new Array();
	if (arguments.length > 1) {
		for (var i = 0, elements = [], length = arguments.length; i < length; i++)
		elements.push($(arguments[i]));
		return elements;
	}
	element = document.getElementById(element);
	return element;
};

function chg(elm){
	var inner=elm.parentNode.nextSibling;
	if(inner.style.display=="block"){
		inner.style.display="none";
	}else{
		inner.style.display="block";
	}
}

var _Admin5_init = function (el) {
    Util.rootElement = el;
    Util._rows = Util.rootElement.childNodes;
    Util.column = Util._rows;
    Util.dragArray = new Array();
    var counter = 0;
    for (var i = 0; i < Util.column.length; i++) {
        var ele = Util.column[i];
        for (var j = 0; j < ele.childNodes.length; j++) {
            var ele1 = ele.childNodes[j];
            if (ele1.tagName == "DIV") {
                Util.dragArray[counter] = new draggable(ele1);
                counter++;
            }
        }
    }
};
</script>
</head>

<body>
<div id="page">
	<!-- 左列 -->
	<div class="col">
		<div id="m_1" class="toolbox">
		<div class="title">
		<div class="control" onClick="chg(this);">×</div>
		<div id="m_1_h">标题一</div>
		</div><div class="inner" style="display:block">木子屋:http://www.mzwu.com/</div></div>
		
		<div id="m_2" class="toolbox">
		<div class="title">
		<div class="control" onClick="chg(this);">×</div>
		<div id="m_2_h">标题二</div>
		</div><div class="inner" style="display:block">木子屋:http://www.mzwu.com/</div></div>
		
		<div class="dm"></div>
	</div>
	<!-- 右列 -->
	<div class="col">
	<div id="m_3" class="toolbox">
	<div class="title">
	<div class="control" onClick="chg(this);">×</div>
	<div id="m_3_h">标题三</div>
	</div><div class="inner" style="display:block">木子屋:http://www.mzwu.com/</div></div>
	
	<div id="m_4" class="toolbox">
	<div class="title">
	<div class="control" onClick="chg(this);">×</div>
	<div id="m_4_h">标题四</div>
	</div><div class="inner" style="display:block">木子屋:http://www.mzwu.com/</div></div>
	
	<div class="dm"></div>
	</div>
</div>
<script>_Admin5_init($("page"));</script>
</body>
</html>

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