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JavaScript模仿鼠標拖動選擇功能_綜合其它特效

JavaScript模仿鼠標拖動選擇功能，就是類似WINODWS系統(tǒng)一樣的選擇功能，選多選少由你自己控制，鼠標點選也可以，值得學(xué)習(xí)一番。

<html>
<head>鼠標點選功能</head>
 <style>
  body{padding-top:50px;padding-left:100px;padding-right:150px;}
  .fileDiv{float:left;width:100px;height:100px;text-align:center;line-height:100px;font-size:12px;border:1px solid #cccccc;margin-right:10px;margin-bottom:10px;}
  .seled{border:1px solid #ff0000;background-color:#D6DFF7;} 
 </style>
 <script type="text/javascript">
Array.prototype.remove = function( item ){
  for( var i = 0 ; i < this.length ; i++ ){
   if( item == this[i] )
    break;
  }
  if( i == this.length )
   return;
  for( var j = i ; j < this.length - 1 ; j++ ){
   this[ j ] = this[ j + 1 ];
  }
  this.length--;
  } 
  
String.prototype.replaceAll = function (AFindText,ARepText){ raRegExp = new RegExp(AFindText,"g"); return this.replace(raRegExp,ARepText);}
 function getAllChildren(e) {
  return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {

if (!document.getElementsByTagName) {
    return new Array();
  }
  var tokens = selector.split(' ');
  var currentContext = new Array(document);
  for (var i = 0; i < tokens.length; i++) {
    token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
    if (token.indexOf('#') > -1) {

var bits = token.split('#');
      var tagName = bits[0];
      var id = bits[1];
      var element = document.getElementById(id);
      if (tagName  &&  element.nodeName.toLowerCase() != tagName) {

return new Array();
      }
      currentContext = new Array(element);
      continue; 
    }
    if (token.indexOf('.') > -1) {

var bits = token.split('.');
      var tagName = bits[0];
      var className = bits[1];
      if (!tagName) {
        tagName = '*';
      }

/*--------------------------------------------------------------------------------------------------------*/
/**
 * author: 王永山
 * version: 1.1 beta
 * date: 2008-09-09
 * email: [email]wangys0927@163.com[/email]
 *
 * update: 
 * 1. 針對前2個beta版，該版本修復(fù)了前兩個版本出現(xiàn)的 bug ，
 * 2. 進行了代碼的簡單封裝（由于本人初學(xué)js，對js掌握的很淺，因此面向?qū)ο蟮睦斫夂懿睿庋b的不好）；
 * 3. 增加了對 Ctrl 和 Shift 鍵的支持(目前shift鍵的功能和ctrl鍵的功能一樣，還不能達到仿windows的選區(qū)Shift鍵的功能)。
 * 4. 增加了獲取“被選區(qū)選中元素”的方法，可以點擊按鈕“getRegions”看效果。
 */
 
 
 function addEvent(eventType,eventFunc,eventObj){
    eventObj = eventObj || document;
    if(window.attachEvent)  eventObj.attachEvent("on"+eventType,eventFunc);
     if(window.addEventListener) eventObj.addEventListener(eventType,eventFunc,false);
  }
function clearEventBubble(evt){
   evt = evt || window.event;
    if (evt.stopPropagation) evt.stopPropagation(); else evt.cancelBubble = true; 
     if (evt.preventDefault)  evt.preventDefault();  else evt.returnValue = false;
}
 
function posXY(event){
 event = event || window.event;
 var posX = event.pageX || (event.clientX +
         (document.documentElement.scrollLeft || document.body.scrollLeft));
 var posY = event.pageY || (event.clientY +
         (document.documentElement.scrollTop || document.body.scrollTop));
 return {x:posX, y:posY};
}

if(!document.getElementById("selContainer")){
     this.selectDiv = document.createElement("div");
     this.selectDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;";
     this.selectDiv.id = "selContainer";
     document.body.appendChild(this.selectDiv);
   }else{
     this.selectDiv = document.getElementById("selContainer");
   }
   
   this.startX = posXY(evt).x;
   this.startY = posXY(evt).y;
   this.isSelect = true;
   
 }
 
 RegionSelect.prototype.onSelect = function(evt){
    var _self = this;
    if(_self.isSelect){
      if(_self.selectDiv.style.display == "none") _self.selectDiv.style.display = "";
      
      var posX = posXY(evt).x;
      var poxY = posXY(evt).y;
      
      _self.selectDiv.style.left   = Math.min(posX, this.startX);
     _self.selectDiv.style.top    = Math.min(poxY, this.startY);
     _self.selectDiv.style.width  = Math.abs(posX - this.startX);
     _self.selectDiv.style.height = Math.abs(poxY - this.startY);  
     
     var regionList = _self.regions;
     for(var i=0; i< regionList.length; i++){
       var r = regionList[i], sr = _self.innerRegion(_self.selectDiv,r);
       if(sr  &&  r.className.indexOf(_self.selectedClass) == -1){
          r.className = r.className + " "+_self.selectedClass; 
          _selectedRegions.push(r);
       }else if(!sr  &&  r.className.indexOf(_self.selectedClass) != -1){
          r.className = r.className.replaceAll(_self.selectedClass,"");
         _selectedRegions.remove(r);
        }
       
     }
   }
 }
 
 RegionSelect.prototype.onEnd = function(){
  if(this.selectDiv){
    this.selectDiv.style.display = "none"; 
  }
  this.isSelect = false;
  //_selectedRegions = this.selectedRegion;
 }
 
 // 判斷一個區(qū)域是否在選擇區(qū)內(nèi)
 RegionSelect.prototype.innerRegion = function(selDiv, region){
   var s_top = parseInt(selDiv.style.top);
   var s_left = parseInt(selDiv.style.left);
   var s_right = s_left + parseInt(selDiv.offsetWidth);
   var s_bottom = s_top + parseInt(selDiv.offsetHeight);
   
   var r_top = parseInt(region.offsetTop);
   var r_left = parseInt(region.offsetLeft);
   var r_right = r_left + parseInt(region.offsetWidth);
   var r_bottom = r_top + parseInt(region.offsetHeight);
   
    var t = Math.max(s_top, r_top);
     var r = Math.min(s_right, r_right);
     var b = Math.min(s_bottom, r_bottom);
     var l = Math.max(s_left, r_left);
 
      if (b > t+5  &&  r > l+5) {
          return region;
      } else {
          return null;
      }
   
 }
 
 RegionSelect.prototype.clearSelections = function(regions){
  for(var i=0; i<regions.length;i++){
   regions[i].className = regions[i].className.replaceAll(this.selectedClass,"");
  }
 }
 
 function getSelectedRegions(){
  return  _selectedRegions;
 }

function showSelDiv(){
   var selInfo = "";
   var arr = getSelectedRegions();
   for(var i=0; i<arr.length;i++){
       selInfo += arr[i].innerHTML+"\n";
   }

alert("共選擇 "+arr.length+" 個文件，分別是：\n"+selInfo);
   
 }
 
  </script> 
 <body>
<button onclick="showSelDiv();">getRegions</button>
<div class="fileDiv">file1</div>
<div class="fileDiv">file2</div>
<div class="fileDiv">file3</div>
<div class="fileDiv">file4</div>
<div class="fileDiv">file5</div>
<div class="fileDiv">file6</div>
<div class="fileDiv">file7</div>
<div class="fileDiv">file8</div>
<div style="float:left;width:100%;"><button onclick="showSelDiv();">getRegions</button></div>
 </body> 
 <script>
    new RegionSelect({
     region:'div.fileDiv',
     selectedClass: 'seled'
    }).select();
 </script>
</html>

所屬頻道：綜合其它特效/更新時間：2013-05-08

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