可拖动及显示轨迹的特效-JS特效-爱易网页

可拖动及显示轨迹的特效

日期：2014-05-18　浏览次数：20183 次

以下是程序代码

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>拖动_轨迹运行 ali_xixi整理</title>
<style type="text/css">
*   {margin:0px;padding:0px;}
#div1  {position:relative;left:200px;top:200px;width:100px; height:100px; background-color:#f60;cursor:move;}
</style>
<script type="text/javascript">
var isIE = (document.all)?true:false;
var $ID = function(id){
 return "string"==typeof id?document.getElementById(id):id;
}
var Class = {
 create:function(){
  return function(){
   this.initilize.apply(this,arguments);
  }
 }
}
var Extend = function(destination, source){
 for(var property in source){
  destination[property] = source[property];
 }
}
var Bind = function(object,fun){
 var args = Array.prototype.slice.call(arguments).slice(2);
 return function(){
  return fun.apply(object,args);
 }
}
var BindAsEventListener = function(object,fun){
 var args = Array.prototype.slice.call(arguments).slice(2);
 return function(event){
  return fun.apply(object,[event||window.event].concat(args));
 }
}
function addEventHandler(oTarget, sEventType, fnHandler) {
 if (oTarget.addEventListener) {
  oTarget.addEventListener(sEventType, fnHandler, false);
 } else if (oTarget.attachEvent) {
  oTarget.attachEvent("on" + sEventType, fnHandler);
 } else {
  oTarget["on" + sEventType] = fnHandler;
 }
};
function removeEventHandler(oTarget, sEventType, fnHandler) {
    if (oTarget.removeEventListener) {
        oTarget.removeEventListener(sEventType, fnHandler, false);
    } else if (oTarget.detachEvent) {
        oTarget.detachEvent("on" + sEventType, fnHandler);
    } else { 
        oTarget["on" + sEventType] = null;
    }
};
function getNodePosition(node,type){//type="left"or"top"
 var nodeTemp = node;
    var l = 0;
 var t = 0;
    while(nodeTemp!=document.body&&nodeTemp!=null){
     l += nodeTemp.offsetLeft;
  t += nodeTemp.offsetTop;
     nodeTemp = nodeTemp.offsetParent;
 }
 if(type.toLowerCase()=="left") return l;
 else return t;
}
//前面通常都用一个base.js封装
</script>
<script type="text/javascript">
var MyDrag = Class.create();
MyDrag.prototype = {
 initilize:function(obj){
  this.Obj = $ID(obj);
  this._x = this._y = 0;
  this._xx = this._yy = 0;//Move记录坐标
  this.Obj.style.position = "absolute";
  this._pos = [];
  this._ifSavePos = true;
  this._t = null;
  this._speed = 10;
  this._indexMove = 0;//全局的MoveIndex
  this._fnStart = BindAsEventListener(this,this.Start); 
  this._fnMove = BindAsEventListener(this,this.Move);
  this._fnStop = Bind(this,this.Stop);
  addEventHandler(this.Obj,"mousedown",this._fnStart);
 },
 Start:function(oEvent){
  if(!this._ifSavePos)
   this._pos = [];
  this.Drag = this.Obj.cloneNode(true);
  if(isIE) this.Drag.style.filter = "alpha(opacity=50)";
  else this.Drag.style.opacity = "0.5";
  this.Obj.parentNode.appendChild(this.Drag);
  
  this._left1 = this._xx = getNodePosition(this.Obj,"left");
  this._top1 = this._yy = getNodePosition(this.Obj,"top");
  this._x = oEvent.clientX - this.Obj.offsetLeft;
  this._y = oEvent.clientY - this.Obj.offsetTop;
  addEventHandler(document,"mousemove",this._fnMove);
  addEventHandler(document,"mouseup",this._fnStop);
  this._t = setInterval(Bind(this,this.SavePos),10);
 },
 SavePos:function(){//记录坐标点
  this._pos.push(this._xx + "_" + this._yy);
 },
 Move:f</div></div>

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