JavaScript实现右键菜单（三）

BSRightMenu

/**
 * <p>标题: BSRightMenu</p>
 * <p>功能描述: BS右键菜单对象。装载所有的右键菜单块</p>
 * <p>作者: BinaryStar原创B/S框架</p>
 * <p>版本: 0.1</p>
 * <p>创建日期: 2005-12-21</p>
 */

function BSRightMenu(id)...{
  this.id = id||"BSRightMenu_1";//ID
  this.itemAreaList = new Array();//右键集合
  this.showItemAreaIndex = -1;//当前显示的右键菜单块
  this.clickItemIndex = -1;//当前鼠标单击所在的子菜单项索引。
  this.maxLevel = 0;//菜单树深度
  var rmlist = null;
  this.imagePath = "";//缺省的路径
  this.popupList = new Array();//popup窗口列表

  this.setImagesPath = function(inPath)...{
    this.imagePath = inPath;
  }
  //设置最大深度值
  this.setMaxLevel = function (inLevel)...{
    if (inLevel > this.maxLevel)...{
      this.maxLevel = inLevel;
    }
  }
  //添加一个右键菜单块
  this.addItemArea = function (text)...{
    var area = new BSRightItemArea(this.id, this.itemAreaList.length, text);
    this.itemAreaList.length++;
    this.itemAreaList[this.itemAreaList.length-1] = area;
    return area;
  }

  //激发右键菜单
  this.doRightMenu = function (areaIndex)...{
    window.event.cancelBubble=true;
   this.rmIni();
    var curAreaIndex = 0;
    if (areaIndex != null)...{
      curAreaIndex = areaIndex;
    }
    this.hiddenAll(0);
    if (areaIndex < 0)...{
      event.srcElement.oncontextmenu = null;
      return;
    }
    if(window.event.button == this.itemAreaList[areaIndex].mouseType)...{
     this.setRMIndex(areaIndex, -1);

      event.srcElement.oncontextmenu = function()...{return false;};
      //展现前的准备
      if (this.itemAreaList[areaIndex].preShowFun.Trim() != "")...{
        try...{
         eval(this.itemAreaList[areaIndex].preShowFun);
        }
        catch(e)...{
         var errStr = "*^_^*恭喜你中招了!  "+e.name+":"+e.message+"  激发右键前的准备方法 "+this.itemAreaList[areaIndex].preShowFun+" 发生严重错误！";
          return;
        }
      }
   //展现第一层子菜单
   this.createPopDiv(curAreaIndex);
    }
    else...{
      event.srcElement.oncontextmenu = null;
    }
  }

  this.rmIni = function()...{
    if (document.getElementById(this.id + "_thisAreaIndex") == null)...{
      var temp = document.createElement("input");
      temp.id = this.id + "_thisAreaIndex";
      temp.value = -1;
      temp.style.display="none";
      temp.type = "hidden";
      document.body.appendChild(temp);
    }
    if (document.getElementById(this.id + "_thisItemIndex") == null)...{
      var temp = document.createElement("input");
      temp.id = this.id + "_thisItemIndex";
      temp.value = -1;
      temp.style.display="none";
      temp.type = "hidden";
      document.body.appendChild(temp);
    }
  }

  this.setRMIndex = function (areaIndex, itemIndex)...{
    document.getElementById(this.id+"_thisAreaIndex").value = areaIndex;
    this.showItemAreaIndex = areaIndex;
    document.getElementById(this.id+"_thisItemIndex").value = itemIndex;
    this.clickItemIndex = itemIndex;
  }

 this.createPopDiv = function(curAreaIndex)...{
  var div = null;
   //创建popup
  if (this.popupList[0] == null)...{
   this.popupList[0] = window.createPopup();
   if (this.popupList[0].document.charset != "GB2312")...{
    try...{
     this.popupList[0].document.charset="GB2312";
    }
    catch(ex)...{
    }
   }

   this.popupList[0].document.oncontextmenu = function()...{return false;};
  }
  this.popupList[0].document.body.innerHTML = "";
  this.popupList[0].show(0,0,1,1);
   if (this.popupList[0].document.getElementById(this.id+"_ItemDiv") == null)...{
      div = this.popupList[0].document.createElement("div");
      div.style.cssText = bs_rm_div;
     div.id = this.id+"_ItemDiv";
     div.innerHTML = this.itemAreaList[curAreaIndex].show();
     this.popupList[0].document.body.appendChild(div);
     div.innerHTML += "<input type="hidden" id=""+this.id+"_selectItem" name=""+this.id+"_selectItem" value="-1"/>";
   }
   else...{
     div = this.popupList[0].document.getElementById(this.id+"_ItemDiv");
     div.innerHTML = this.itemAreaList[curAreaIndex].show();
     div.innerHTML += "<input type="hidden" id=""+this.id+"_selectItem" name=""+this.id+"_selectItem" value="-1"/>";
   }

    var left = window.event.clientX-1;
    var top = window.event.clientY-1;
    //window.status = (left+window.screenLeft);
    if (((left+window.screenLeft) + div.offsetWidth) >= window.screen.availWidth)...{
      left -= (div.offsetWidth-1);
    }
    if(((top+window.screenTop)+div.offsetHeight) >= window.screen.availHeight)...{
      top -= (div.offsetHeight-1);
    }
  var width = div.offsetWidth;
  var Height = div.offsetHeight;
  this.popupList[0].show(left, top, width, Height, document.body);
 }

  //隐藏指定深度下所有展现的菜单
  this.hiddenAll = function(inLevel)...{
    var tlevel = 0;
    if (inLevel != null)...{
      var tlevel = inLevel
    }
   for (var i=this.popupList.length-1; i>=inLevel; i--)...{
    if (this.popupList[i] !=null && this.popupList[i].isOpen)...{
     this.popupList[i].hide();
     //this.popupList[i] = null;
    }
   }
  }

  //得到当前显示的菜单块
  this.getThisRMArea = function()...{
    return this.itemAreaList[this.showItemAreaIndex];
  }

  //得到指定显示的菜单块
  this.getThisRMAreaByIndex = function(inIndex)...{
   if (inIndex >=0 && inIndex<this.itemAreaList.length)...{
     return this.itemAreaList[inIndex];
   }
   alert("对不起，没有找到指定的菜单块！");
   return null;
  }

  //得到当前显示的菜单项
  this.getThisRMItem = function()...{
    return this.getThisRMArea().itemList[this.clickItemIndex];
  }

  //得到指定Key的菜单项
  this.getThisRMItemByKey = function(inKey, inAreaIndex)...{
   var tArea = this.getThisRMArea();
   if (tArea == null && inAreaIndex != null)...{
    tArea = this.getThisRMAreaByIndex(inAreaIndex);
   }
   if (tArea != null)...{
    for (var i=0; i<tArea.itemList.length; i++)...{
     if (tArea.itemList[i].key == inKey)...{
      return tArea.itemList[i];
     }
    }
   }
   alert("对不起，没有找到指定的菜单项！");
    return null;
  }

  //得到父亲名称
  this.getRMName = function(level)...{
   var fname = "";
   for (var i=0; i<level+1; i++)...{
    fname += "parent."
   }
   fname += this.id;
   return fname;
  }
}
 

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