function browserSVGCheck(){
	if(navigator.userAgent.indexOf("MSIE 8.0")>0||navigator.userAgent.indexOf("MSIE 7.0")>0||navigator.userAgent.indexOf("MSIE 6.0")>0){
		FlowChart.prototype.useSVG="";
	}else{
		FlowChart.prototype.useSVG="1";
	}
}
function browserNavigator(h1,h2){
	if (navigator.userAgent.indexOf("8.0") != -1){
		return h2;
	}
	return h1
}
//定义一个区域图类：
function FlowChart(bgDiv,property){
	browserSVGCheck();
	//初始化区域图的对象
	this.$id=bgDiv.attr("id");
	this.$bgDiv=bgDiv;//最父框架的DIV
	this.$bgDiv.addClass("FlowChart");
	if(FlowChart.prototype.color.font){
		this.$bgDiv.css("color",FlowChart.prototype.color.font);
	}
	
	var width=(property.width||800)-2;
	var height=(property.height||500)-2;
	this.$bgDiv.css({width:width+"px",height:height+"px"});
	this.$tool=null;//左侧工具栏对象
	this.$head=null;//顶部标签及工具栏按钮
	this.$title="newFlow_1";//流程图的名称
	this.$nodeRemark={};//每一种结点或按钮的说明文字,JSON格式,key为类名,value为用户自定义文字说明
	this.$nowType="cursor";//当前要绘制的对象类型
	this.$lineData={};
	this.$lineCount=0;
	this.$nodeData={};
	this.$nodeCount=0;
	this.$areaData={};
	this.$areaCount=0;
	this.$lineDom={};
	this.$nodeDom={};
	this.$areaDom={};
	this.$max=property.initNum||1;//计算默认ID值的起始SEQUENCE
	this.$focus="";//当前被选定的结点/转换线ID,如果没选中或者工作区被清空,则为""
	this.$cursor="default";//鼠标指针在工作区内的样式
	this.$editable=false;//工作区是否可编辑
	this.$deletedItem={};//在流程图的编辑操作中被删除掉的元素ID集合,元素ID为KEY,元素类型(node,line.area)为VALUE
	var headHeight=0;
	var toolWidth=0;
	if(property.haveHead){
		var html=["<div class='FlowChart_head' "];
		html.push(FlowChart.prototype.color.main? "style='border-bottom-color:"+FlowChart.prototype.color.main+"'" : "");
		html.push(">");
		if(property.headLabel){
			html.push("<label title='",property.initLabelText,"' ");
			html.push(FlowChart.prototype.color.main? "style='background:"+FlowChart.prototype.color.main+"'" : "",">");
			html.push(property.initLabelText);
			html.push("</label>");
		}
		$.each(property.headBtns,function(x,headBtn){
			html.push("<a href='javascript:void(0)' class='FlowChart_head_btn' title='",headBtn['name'],"'><i class='ico_",headBtn['code'],"' id='",headBtn['code'],"'></i></a>");
		});
		html.push("</div>");
		this.$head=$(html.join(''));
		this.$bgDiv.append(this.$head);
		headHeight=24;
		//以下是当工具栏按钮被点击时触发的事件自定义(虚函数),格式为function(),因为可直接用THIS操作对象本身,不用传参；用户可自行重定义:
		this.onBtnNewClick=null;//新建流程图按钮被点中
		this.onBtnOpenClick=null;//打开流程图按钮定义
		this.onBtnSaveClick=null;//保存流程图按钮定义
		this.onFreshClick=null;//重载流程图按钮定义
		this.onBtnClick=null;
		if(property.headBtns){
			this.$head.on("click",{inthis:this},function(e){
				if(!e){e=window.event;}
				var tar=e.target;
				if(tar.tagName=="DIV"||tar.tagName=="SPAN")	return;
				else if(tar.tagName=="a")	tar=tar.childNode[0];
				var This=e.data.inthis;
				//定义顶部操作栏按钮的事件
				switch($(tar).attr("id")){
					case "new":		if(This.onBtnNewClick!=null)	This.onBtnNewClick();break;
					case "open":	if(This.onBtnOpenClick!=null)	This.onBtnOpenClick();break;
					case "save":	if(This.onBtnSaveClick!=null)	This.onBtnSaveClick();break;
					//case "undo":	This.undo();break;
					//case "redo":	This.redo();break;
					case "reload"	:if(This.onFreshClick!=null)	This.onFreshClick();break;
					default :
						if(This.onBtnClick!=null){
							This.onBtnClick($(tar).attr("id"),$(tar));
						}
						break;
				}
			});
		}
	}
	if(property.haveTool){
		this.$bgDiv.append("<div class='FlowChart_tool'"+(property.haveHead? "":" style='margin-top:3px'")+"><div style='height:"+(height-headHeight-(property.haveHead? 7:10))+"px' class='FlowChart_tool_div'></div></div>");
		this.$tool=this.$bgDiv.find(".FlowChart_tool div");
		//未加代码：加入绘图工具按钮
		this.$tool.append("<a href='javascript:void(0)' type='cursor' class='FlowChart_tool_btndown' id='"+this.$id+"_btn_cursor'><i class='ico_cursor'/></a>");
		//this.$tool.append("<a href='javascript:void(0)' type='mutiselect' class='FlowChart_tool_btn' id='"+this.$id+"_btn_mutiselect'><i class='ico_mutiselect'/></a>");
		this.$tool.append("<a href='javascript:void(0)' type='direct' class='FlowChart_tool_btn' id='"+this.$id+"_btn_direct'><i class='ico_direct'/></a>"); 
		if(property.toolBtns&&property.toolBtns.length>0){
			var html=["<span/>"];
			//加入自定义按钮
			$.each(property.toolBtns,function(x,toolBtn){
				html.push("<a href='javascript:void(0)' type='",toolBtn,"' id='",this.$id,"_btn_",toolBtn.split(" ")[0],"' class='FlowChart_tool_btn'><i class='ico_",toolBtn,"'/></a>");
			});
			this.$tool.append(html.join(''));
		}
		//加入区域划分框工具开关按钮
		if(property.haveGroup){
			this.$tool.append("<span/><a href='javascript:void(0)' type='group' class='FlowChart_tool_btn' id='"+this.$id+"_btn_group'><i class='ico_group'/></a>");
		}
		toolWidth=31;
		this.$nowType="cursor";
		//绑定各个按钮的点击事件
		this.$tool.on("click",{inthis:this},function(e){
			if(!e){
				e=window.event;
			}
			var tar;
			switch(e.target.tagName){
				case "SPAN":return false;
				case "DIV":return false;
				case "I":	tar=e.target.parentNode;break;
				case "A":	tar=e.target;
			};
			var type=$(tar).attr("type");
			e.data.inthis.switchToolBtn(type);
			return false;
		});
		this.$editable=true;//只有具有工具栏时可编辑
	} 
	width=width-toolWidth-9;
	height=height-headHeight-(property.haveHead? 5:8);
	this.$bgDiv.append("<div class='FlowChart_work' style='width:"+(width)+"px;height:"+(height)+"px;"+(property.haveHead? "":"margin-top:3px")+"'></div>");
	this.$workArea=$("<div class='FlowChart_work_inner' style='width:"+width*3+"px;height:"+height*3+"px'></div>");
	this.$workArea.attr({"unselectable":"on","onselectstart":'return false',"onselect":'document.selection.empty()'});
	this.$bgDiv.children(".FlowChart_work").append(this.$workArea);
	this.$draw=null;//画矢量线条的容器
	this.initDraw("draw_"+this.$id,width,height);
	this.$group=null;
	if(property.haveGroup){
		this.initGroup(width,height);
	}
	if(this.$editable){
	  this.$workArea.on("click",{inthis:this},function(e){
		  var This=e.data.inthis;
		  if(!This.$editable){
			  return;
		  }
		  var type=This.$nowType;
		  if(type=="cursor"){
			  var t=$(e.target);
			  var n=t.prop("tagName");
			  if(n=="svg"||(n=="DIV"&&t.prop("class").indexOf("FlowChart_work")>-1)||n=="LABEL"){
				  if(This.$lineOper.data("tid")){
					  This.focusItem(This.$lineOper.data("tid"),false);
				  }else{
					  This.blurItem();
				  }
			  }
			  return;
		  }else if(type=="direct"||type=="group"){
			  return;
		  }
		  var X,Y;
		  var ev=mousePosition(e),t=getElCoordinate(this);
		  X=ev.x-t.left+this.parentNode.scrollLeft-1;
		  Y=ev.y-t.top+this.parentNode.scrollTop-1; 
		  This.addNode(This.$id+"_node_"+This.$max,{name:"node_"+This.$max,left:X,top:Y,type:This.$nowType});
		  This.$max++;
	  });
	  //划线或改线时用的绑定
	  this.$workArea.mousemove({inthis:this},function(e){
			if(e.data.inthis.$nowType!="direct"&&!e.data.inthis.$mpTo.data("p")){
				return;
			}
			var lineStart=$(this).data("lineStart");
			var lineEnd=$(this).data("lineEnd");
			if(!lineStart&&!lineEnd){
				return;
			}
			var ev=mousePosition(e),t=getElCoordinate(this);
			var X,Y;
			X=ev.x-t.left+this.parentNode.scrollLeft;
			Y=ev.y-t.top+this.parentNode.scrollTop;
			var line=document.getElementById("FlowChart_tmp_line");
			if(lineStart){
				if(FlowChart.prototype.useSVG!=""){
					line.childNodes[0].setAttribute("d","M "+lineStart.x+" "+lineStart.y+" L "+X+" "+Y);
					line.childNodes[1].setAttribute("d","M "+lineStart.x+" "+lineStart.y+" L "+X+" "+Y);
					if(line.childNodes[1].getAttribute("marker-end")=="url(\"#arrow2\")"){
						line.childNodes[1].setAttribute("marker-end","url(#arrow3)");
					}else{
						line.childNodes[1].setAttribute("marker-end","url(#arrow2)");
					}	
				}else{
					line.points.value=lineStart.x+","+lineStart.y+" "+X+","+Y;
				}
			}else if(lineEnd){
				if(FlowChart.prototype.useSVG!=""){
					line.childNodes[0].setAttribute("d","M "+X+" "+Y+" L "+lineEnd.x+" "+lineEnd.y);
					line.childNodes[1].setAttribute("d","M "+X+" "+Y+" L "+lineEnd.x+" "+lineEnd.y);
					if(line.childNodes[1].getAttribute("marker-end")=="url(\"#arrow2\")"){
						line.childNodes[1].setAttribute("marker-end","url(#arrow3)");
					}else{
						line.childNodes[1].setAttribute("marker-end","url(#arrow2)");
					}
				}else{
					line.points.value=X+","+Y+" "+lineEnd.x+","+lineEnd.y;
				}
			}
	  });
	  this.$workArea.mouseup({inthis:this},function(e){
		  var This=e.data.inthis;
		  if(This.$nowType!="direct"&&!This.$mpTo.data("p")){
			  return;
		  }
		  var tmp=document.getElementById("FlowChart_tmp_line");
		  if(tmp){
			  $(this).css("cursor","auto").removeData("lineStart").removeData("lineEnd");
			  This.$mpTo.hide().removeData("p");
			  This.$mpFrom.hide().removeData("p");
			  This.$draw.removeChild(tmp);
			  This.focusItem(This.$focus,false);
		  }else{
			   This.$lineOper.removeData("tid");
		  }
	  });
	  //为了结点而增加的一些集体delegate绑定
	  this.initWorkForNode();
	  //对结点进行移动或者RESIZE时用来显示的遮罩层
	  this.$ghost=$("<div class='rs_ghost'></div>").attr({"unselectable":"on","onselectstart":'return false',"onselect":'document.selection.empty()'});
	  this.$bgDiv.append(this.$ghost);
	  this.$textArea=$("<textarea></textarea>");
	  this.$bgDiv.append(this.$textArea);
	  this.$lineMove=$("<div class='FlowChart_line_move' style='display:none'></div>");//操作折线时的移动框
	  this.$workArea.append(this.$lineMove);
	  this.$lineMove.on("mousedown",{inthis:this},function(e){
		  if(e.button==2){
			  return false;
		  }
		  var lm=$(this);
		  lm.css({"background-color":FlowChart.prototype.color.font||"#333"});
		  var This=e.data.inthis;
		  var ev=mousePosition(e),t=getElCoordinate(This.$workArea[0]);
		  var X,Y;
		  X=ev.x-t.left+This.$workArea[0].parentNode.scrollLeft;
		  Y=ev.y-t.top+This.$workArea[0].parentNode.scrollTop;
		  var p=This.$lineMove.position();
		  var vX=X-p.left,vY=Y-p.top;
		  var isMove=false;
		  /*document.onmousemove=function(e){
			  if(!e){
				  e=window.event;
			  }
			  var ev=mousePosition(e);
			  var ps=This.$lineMove.position();
			  X=ev.x-t.left+This.$workArea[0].parentNode.scrollLeft;
		 	  Y=ev.y-t.top+This.$workArea[0].parentNode.scrollTop;
			  if(This.$lineMove.data("type")=="lr"||This.$lineMove.data("type")=="olr"){
			    X=X-vX;
			    if(X<0){
					X=0;
				}else if(X>This.$workArea.width()){
					X=This.$workArea.width();
				}
			    This.$lineMove.css({left:X+"px"});
			  }else if(This.$lineMove.data("type")=="tb"||This.$lineMove.data("type")=="otb"){
				  Y=Y-vY;
				  if(Y<0){
					  Y=0;
				  }else if(Y>This.$workArea.height()){
					  Y=This.$workArea.height();
				  }
				  This.$lineMove.css({top:Y+"px"});
			  }
			  isMove=true;
		  };
		  document.onmouseup=function(e){
			  if(isMove){
				  var p=This.$lineMove.position();
				  if(This.$lineMove.data("type")=="lr"||This.$lineMove.data("type")=="olr"){
					  This.setLineM(This.$lineMove.data("tid"),p.left+3);
				  }else if(This.$lineMove.data("type")=="tb"||This.$lineMove.data("type")=="otb"){
					  This.setLineM(This.$lineMove.data("tid"),p.top+3);
				  }
			  }
			  This.$lineMove.css({"background-color":"transparent"});
			  if(This.$focus==This.$lineMove.data("tid")){
				  This.focusItem(This.$lineMove.data("tid"));
			  }
			  document.onmousemove=null;
			  document.onmouseup=null;
		  };*/
	  });
	  //选定一条转换线后出现的浮动操作栏，有改变线的样式和删除线等按钮。
	  var _lineOperHtml=["<div class='FlowChart_line_oper' style='display:none'>"];
	  _lineOperHtml.push("<i class='b_l1'></i>");
	  _lineOperHtml.push("<i class='b_l2'></i>");
	  _lineOperHtml.push("<i class='b_l3'></i>");
	  _lineOperHtml.push("<i class='b_l5'></i>");
	  _lineOperHtml.push("<i class='b_l4'></i>");
	  _lineOperHtml.push("<i class='b_x'></i>");
	  _lineOperHtml.push("</div>");
	  this.$lineOper=$(_lineOperHtml.join(''));//选定线时显示的操作框
	  this.$workArea.parent().append(this.$lineOper);
	  this.$lineOper.on("click",{inthis:this},function(e){
	 	if(!e){
			e=window.event;
		}
		if(e.target.tagName!="I"){
			return;
		}
		var This=e.data.inthis;
		var id=$(this).data("tid");
		switch($(e.target).attr("class")){
			case "b_x":	
			This.delLine(id);
			this.style.display="none";break;
			case "b_l1":
			This.setLineType(id,"lr");break;
			case "b_l2":
			This.setLineType(id,"tb");break;
			case "b_l3":
			This.setLineType(id,"sl");break;
			case "b_l4":
				This.setLineType(id,"olr");break;
			case "b_l5":
				This.setLineType(id,"otb");break;
		}
	  });
	  //新增移动线两个端点至新的结点功能移动功能，这里要提供移动用的DOM
	  this.$mpFrom=$("<div class='FlowChart_line_mp' style='display:none'></div>");
	  this.$mpTo=$("<div class='FlowChart_line_mp' style='display:none'></div>");
	  this.$workArea.append(this.$mpFrom).append(this.$mpTo);
	  this.initLinePointsChg();
	  //下面绑定当结点/线/分组块的一些操作事件,这些事件可直接通过this访问对象本身
	  //当操作某个单元（结点/线/分组块）被添加时，触发的方法，返回FALSE可阻止添加事件的发生
	  //格式function(id，type,json)：id是单元的唯一标识ID,type是单元的种类,有"node","line","area"三种取值,json即addNode,addLine或addArea方法的第二个传参json.
	  this.onItemAdd=null;
	  //当操作某个单元（结点/线/分组块）被删除时，触发的方法，返回FALSE可阻止删除事件的发生
	  //格式function(id，type)：id是单元的唯一标识ID,type是单元的种类,有"node","line","area"三种取值
	  this.onItemDel=null;
	  //当操作某个单元（结点/分组块）被移动时，触发的方法，返回FALSE可阻止移动事件的发生
	  //格式function(id，type,left,top)：id是单元的唯一标识ID,type是单元的种类,有"node","area"两种取值，线line不支持移动,left是新的左边距坐标，top是新的顶边距坐标
	  this.onItemMove=null;
	  //当操作某个单元（结点/线/分组块）被重命名时，触发的方法，返回FALSE可阻止重命名事件的发生
	  //格式function(id,name,type)：id是单元的唯一标识ID,type是单元的种类,有"node","line","area"三种取值,name是新的名称
	  this.onItemRename=null;
	  //当操作某个单元（结点/线）被由不选中变成选中时，触发的方法，返回FALSE可阻止选中事件的发生
	  //格式function(id,type)：id是单元的唯一标识ID,type是单元的种类,有"node","line"两种取值,"area"不支持被选中
	  this.onItemFocus=null;
	  //当操作某个单元（结点/线）被由选中变成不选中时，触发的方法，返回FALSE可阻止取消选中事件的发生
	  //格式function(id，type)：id是单元的唯一标识ID,type是单元的种类,有"node","line"两种取值,"area"不支持被取消选中
	  this.onItemBlur=null;
	  //当操作某个单元（结点/分组块）被重定义大小或造型时，触发的方法，返回FALSE可阻止重定大小/造型事件的发生
	  //格式function(id，type,width,height)：id是单元的唯一标识ID,type是单元的种类,有"node","line","area"三种取值;width是新的宽度,height是新的高度
	  this.onItemResize=null;
	  //当移动某条折线中段的位置，触发的方法，返回FALSE可阻止重定大小/造型事件的发生
	  //格式function(id，M)：id是单元的唯一标识ID,M是中段的新X(或Y)的坐标
	  this.onLineMove=null;
	  //当变换某条连接线的类型，触发的方法，返回FALSE可阻止重定大小/造型事件的发生
	  //格式function(id，type)：id是单元的唯一标识ID,type是连接线的新类型,"sl":直线,"lr":中段可左右移动的折线,"tb":中段可上下移动的折线
	  this.onLineSetType=null;
	  //当变换某条连接线的端点变更连接的结点时，触发的方法，返回FALSE可阻止重定大小/造型事件的发生
	  //格式function(id，newStart,newEnd)：id是连线单元的唯一标识ID,newStart,newEnd分别是起始结点的ID和到达结点的ID
	  this.onLinePointMove=null;
	  //当用重色标注某个结点/转换线时触发的方法，返回FALSE可阻止重定大小/造型事件的发生
	  //格式function(id，type，mark)：id是单元的唯一标识ID,type是单元类型（"node"结点,"line"转换线），mark为布尔值,表示是要标注TRUE还是取消标注FALSE
	  this.onItemMark=null;
	  
	  if(property.useOperStack&&this.$editable){//如果要使用堆栈记录操作并提供“撤销/重做”的功能,只在编辑状态下有效
		this.$undoStack=[];
		this.$redoStack=[];
		this.$isUndo=0;
		///////////////以下是构造撤销操作/重做操作的方法
		//为了节省浏览器内存空间,undo/redo中的操作缓存栈,最多只可放40步操作;超过40步时,将自动删掉最旧的一个缓存
		this.pushOper=function(funcName,paras){
			var len=this.$undoStack.length;
			if(this.$isUndo==1){
				this.$redoStack.push([funcName,paras]);
				this.$isUndo=false;
				if(this.$redoStack.length>40){
					this.$redoStack.shift();
				}
			}else{
				this.$undoStack.push([funcName,paras]);
				if(this.$undoStack.length>40){
					this.$undoStack.shift();
				}
				if(this.$isUndo==0){
					this.$redoStack.splice(0,this.$redoStack.length);
				}
				this.$isUndo=0;
			}
		};
		//将外部的方法加入到FlowChart对象的事务操作堆栈中,在过后的undo/redo操作中可以进行控制，一般用于对流程图以外的附加信息进行编辑的事务撤销/重做控制；
		//传参func为要执行方法对象,jsonPara为外部方法仅有的一个面向字面的JSON传参,由JSON对象带入所有要传的信息；
		//提示:为了让外部方法能够被UNDO/REDO,需要在编写这些外部方法实现时,加入对该方法执行后效果回退的另一个执行方法的pushExternalOper
		this.pushExternalOper=function(func,jsonPara){
			this.pushOper("externalFunc",[func,jsonPara]);
		};
		//撤销上一步操作
		this.undo=function(){
			if(this.$undoStack.length==0)	return;
			this.blurItem();
			var tmp=this.$undoStack.pop();
			this.$isUndo=1;
			if(tmp[0]=="externalFunc"){
				tmp[1][0](tmp[1][1]);
			}else{
				//传参的数量,最多支持6个.
				switch(tmp[1].length){
					case 0:this[tmp[0]]();break;
					case 1:this[tmp[0]](tmp[1][0]);break;
					case 2:this[tmp[0]](tmp[1][0],tmp[1][1]);break;
					case 3:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2]);break;
					case 4:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3]);break;
					case 5:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3],tmp[1][4]);break;
					case 6:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3],tmp[1][4],tmp[1][5]);break;
				}
			}
		};
		//重做最近一次被撤销的操作
		this.redo=function(){
			if(this.$redoStack.length==0)	return;
			this.blurItem();
			var tmp=this.$redoStack.pop();
			this.$isUndo=2;
			if(tmp[0]=="externalFunc"){
				tmp[1][0](tmp[1][1]);
			}else{
				//传参的数量,最多支持6个.
				switch(tmp[1].length){
					case 0:this[tmp[0]]();break;
					case 1:this[tmp[0]](tmp[1][0]);break;
					case 2:this[tmp[0]](tmp[1][0],tmp[1][1]);break;
					case 3:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2]);break;
					case 4:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3]);break;
					case 5:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3],tmp[1][4]);break;
					case 6:this[tmp[0]](tmp[1][0],tmp[1][1],tmp[1][2],tmp[1][3],tmp[1][4],tmp[1][5]);break;
				}
			}
		};
	  }
	  $(document).keydown({inthis:this},function(e){
		  //绑定键盘操作
			var This=e.data.inthis;
			if(This.$focus==""){return;}
  			switch(e.keyCode){
				case 46://删除
				This.delNode(This.$focus,true);
				This.delLine(This.$focus);
				break;
			}
	  });
	}
}
FlowChart.prototype={
	useSVG:"",
	getLineStrokeWidth:function(){
		return 1.4;
	},
	//位置补差
	getLineTopDiff:function(diff){
		return diff;
	},
	getLineTextStyle:function(){
		return "cursor:text";
	},
	getSvgMarker:function(id,color){
		var m=document.createElementNS("http://www.w3.org/2000/svg","marker");
		m.setAttribute("id",id);
		m.setAttribute("viewBox","0 0 6 6");
		m.setAttribute("refX",5);
		m.setAttribute("refY",3);
		m.setAttribute("markerUnits","strokeWidth");
		m.setAttribute("markerWidth",6);
		m.setAttribute("markerHeight",6);
		m.setAttribute("orient","auto");
		var path=document.createElementNS("http://www.w3.org/2000/svg","path");
		path.setAttribute("d","M 0 0 L 6 3 L 0 6 z");
		path.setAttribute("fill",color);
		path.setAttribute("stroke-width",0);
		m.appendChild(path);
		return m;
	},
	initDraw:function(id,width,height){
		var elem;
		if(FlowChart.prototype.useSVG!=""){
			this.$draw=document.createElementNS("http://www.w3.org/2000/svg","svg");//可创建带有指定命名空间的元素节点
			this.$workArea.prepend(this.$draw);
			var defs=document.createElementNS("http://www.w3.org/2000/svg","defs");
			this.$draw.appendChild(defs);
			defs.appendChild(FlowChart.prototype.getSvgMarker("arrow1",FlowChart.prototype.color.line||"#000000"));
			defs.appendChild(FlowChart.prototype.getSvgMarker("arrow2",FlowChart.prototype.color.mark||"#ff3300"));
			defs.appendChild(FlowChart.prototype.getSvgMarker("arrow3",FlowChart.prototype.color.mark||"#ff3300"));
		}else{
			this.$draw = document.createElement("v:group");
			this.$draw.coordsize = width*3+","+height*3;
			this.$workArea.prepend("<div class='FlowChart_work_vml' style='position:relative;width:"+width*3+"px;height:"+height*3+"px'></div>");
			this.$workArea.children("div")[0].insertBefore(this.$draw,null);
		}
		this.$draw.id = id;
		this.$draw.style.width = width*3 + "px";
		this.$draw.style.height = +height*3 + "px";
		//绑定连线的点击选中以及双击编辑事件
		var tmpClk=null;
		if(FlowChart.prototype.useSVG!=""){
			tmpClk="g";
		}else {
			tmpClk="PolyLine";
		}
		if(!this.$editable){
			return;
		}
		$(this.$draw).delegate(tmpClk,"click",{inthis:this},function(e){
			e.data.inthis.focusItem(this.id,true);
		});
		$(this.$draw).delegate(tmpClk,"dblclick",{inthis:this},function(e){
			var oldTxt,x,y,from,to;
			var This=e.data.inthis;
			if(FlowChart.prototype.useSVG!=""){
				oldTxt=this.childNodes[2].innerHTML;
				from=this.getAttribute("from").split(",");
				to=this.getAttribute("to").split(",");
			}else{
				oldTxt=this.childNodes[1].innerHTML;
				var n=this.getAttribute("fromTo").split(",");
				from=[n[0],n[1]];
				to=[n[2],n[3]];
			}
			var _lineType=This.$lineData[this.id].type;
			if(_lineType=="lr"||_lineType=="olr"){
				from[0]=This.$lineData[this.id].M;
				to[0]=from[0];
			}else if(_lineType=="tb"||_lineType=="otb"){
				from[1]=This.$lineData[this.id].M;
				to[1]=from[1];
			}
			x=(parseInt(from[0],10)+parseInt(to[0],10))/2-60;
			y=(parseInt(from[1],10)+parseInt(to[1],10))/2-12;
			var t=getElCoordinate(This.$workArea[0]);
			This.$textArea.val(oldTxt).css({
				display:"block",width:120,height:14,
				left:t.left+x-This.$workArea[0].parentNode.scrollLeft,
				top:t.top+y-This.$workArea[0].parentNode.scrollTop
			}).data("id",This.$focus).focus();
			This.$workArea.parent().one("mousedown",function(e){
				if(e.button==2){
					return false;
				}
				This.setName(This.$textArea.data("id"),This.$textArea.val(),"line");
				This.$textArea.val("").removeData("id").hide();
			});
		});
	},
	initGroup:function(width,height){
		this.$group = $("<div class='FlowChart_work_group' style='width:" + width * 3 + "px;height:" + height * 3 + "px'></div>"); //存放背景区域的容器
		this.$workArea.prepend(this.$group);
		if (!this.$editable){
			return;
		}
		//区域划分框操作区的事件绑定
		this.$group.on("mousedown", {inthis: this},function(e) {
			//绑定RESIZE功能以及移动功能
			if (e.button == 2){
				return false;
			}
			var This = e.data.inthis;
			if (This.$nowType != "group"){
				return;
			}
			if (This.$textArea.css("display") == "block") {
				This.setName(This.$textArea.data("id"), This.$textArea.val(), "area");
				This.$textArea.val("").removeData("id").hide();
				return false;
			};
			if (!e){
				e = window.event;
			}
			var cursor = $(e.target).css("cursor");
			var id = e.target.parentNode;
			switch (cursor) {
			case "nw-resize":
				id = id.parentNode;
				break;
			case "w-resize":
				id = id.parentNode;
				break;
			case "n-resize":
				id = id.parentNode;
				break;
			case "move":
				break;
			default:
				return;
			}
			id = id.id;
			var hack = browserNavigator(1,0);
			var ev = mousePosition(e),
			t = getElCoordinate(This.$workArea[0]);

			var X, Y;
			X = ev.x - t.left + This.$workArea[0].parentNode.scrollLeft;
			Y = ev.y - t.top + This.$workArea[0].parentNode.scrollTop;
			if (cursor != "move") {
				This.$ghost.css({
					display: "block",
					width: This.$areaData[id].width - 2 + "px",
					height: This.$areaData[id].height - 2 + "px",
					top: This.$areaData[id].top + t.top - This.$workArea[0].parentNode.scrollTop + hack + "px",
					left: This.$areaData[id].left + t.left - This.$workArea[0].parentNode.scrollLeft + hack + "px",
					cursor: cursor
				});
				var vX = (This.$areaData[id].left + This.$areaData[id].width) - X;
				var vY = (This.$areaData[id].top + This.$areaData[id].height) - Y;
			} else {
				var vX = X - This.$areaData[id].left;
				var vY = Y - This.$areaData[id].top;
			}
			var isMove = false;
			This.$ghost.css("cursor", cursor);
			document.onmousemove = function(e) {
				if (!e) {
					e = window.event;
				}
				var ev = mousePosition(e);
				if (cursor != "move") {
					X = ev.x - t.left + This.$workArea[0].parentNode.scrollLeft - This.$areaData[id].left + vX;
					Y = ev.y - t.top + This.$workArea[0].parentNode.scrollTop - This.$areaData[id].top + vY;
					if (X < 200) X = 200;
					if (Y < 100) Y = 100;
					switch (cursor) {
					case "nw-resize":
						This.$ghost.css({width:X - 2 + "px",height: Y - 2 + "px"});
						break;
					case "w-resize":
						This.$ghost.css({width:X - 2 + "px"});
						break;
					case "n-resize":
						This.$ghost.css({height:Y - 2 + "px"});
						break;
					}
				} else {
					if (This.$ghost.css("display") == "none") {
						This.$ghost.css({
							display: "block",
							width: This.$areaData[id].width - 2 + "px",
							height: This.$areaData[id].height - 2 + "px",
							top: This.$areaData[id].top + t.top - This.$workArea[0].parentNode.scrollTop + hack + "px",
							left: This.$areaData[id].left + t.left - This.$workArea[0].parentNode.scrollLeft + hack + "px",
							cursor: cursor
						});
					}
					X = ev.x - vX;
					Y = ev.y - vY;
					if (X < t.left - This.$workArea[0].parentNode.scrollLeft) {
						X = t.left - This.$workArea[0].parentNode.scrollLeft;
					} else if (X + This.$workArea[0].parentNode.scrollLeft + This.$areaData[id].width > t.left + This.$workArea.width()) {
						X = t.left + This.$workArea.width() - This.$workArea[0].parentNode.scrollLeft - This.$areaData[id].width;
					}
					if (Y < t.top - This.$workArea[0].parentNode.scrollTop) {
						Y = t.top - This.$workArea[0].parentNode.scrollTop;
					} else if (Y + This.$workArea[0].parentNode.scrollTop + This.$areaData[id].height > t.top + This.$workArea.height()) {
						Y = t.top + This.$workArea.height() - This.$workArea[0].parentNode.scrollTop - This.$areaData[id].height;
					}
					This.$ghost.css({
						left: X + hack + "px",
						top: Y + hack + "px"
					});
				}
				isMove = true;
			};
			document.onmouseup = function(e) {
				This.$ghost.empty().hide();
				document.onmousemove = null;
				document.onmouseup = null;
				if (!isMove){
					return;
				}
				if (cursor != "move"){
					This.resizeArea(id, This.$ghost.outerWidth(), This.$ghost.outerHeight());
				}else{
					This.moveArea(id, X + This.$workArea[0].parentNode.scrollLeft - t.left, Y + This.$workArea[0].parentNode.scrollTop - t.top);
				}
				return false;
			};
	  });
	  //绑定修改文字说明功能
	  this.$group.on("dblclick",{inthis:this},function(e){
		  var This=e.data.inthis;
		  if(This.$nowType!="group"){
			  return;
		  }
		  if(!e){
			  e=window.event;
		  }
		  if(e.target.tagName!="LABEL"){
			  return false;
		  }
		  var oldTxt=e.target.innerHTML;
		  var p=e.target.parentNode;
		  var x=parseInt(p.style.left,10)+18,y=parseInt(p.style.top,10)+1;
		  var t=getElCoordinate(This.$workArea[0]);
		  This.$textArea.val(oldTxt).css({
			  display:"block",width:100,height:14,
			  left:t.left+x-This.$workArea[0].parentNode.scrollLeft,
			  top:t.top+y-This.$workArea[0].parentNode.scrollTop
		  }).data("id",p.id).focus();
		  This.$workArea.parent().one("mousedown",function(e){
			  if(e.button==2){
				  return false;
			  }
			  if(This.$textArea.css("display")=="block"){
				  This.setName(This.$textArea.data("id"),This.$textArea.val(),"area");
				  This.$textArea.val("").removeData("id").hide();
			  }
		  });
		  return false;
	  });
	  //绑定点击事件
	  this.$group.mouseup({inthis:this},function(e){
		  var This=e.data.inthis;
		  if(This.$nowType!="group"){
			  return;
		  }
		  if(!e){
			  e=window.event;
		  }
		  switch($(e.target).attr("class")){
			  case "rs_close":	This.delArea(e.target.parentNode.parentNode.id);return false;//删除该分组区域
			  case "bg":	return;
		  }
		  switch(e.target.tagName){
			  case "LABEL":	return false;
			  case "I"://绑定变色功能
			  var id=e.target.parentNode.id;
			  switch(This.$areaData[id].color){
				  case "red":	This.setAreaColor(id,"yellow");break;
				  case "yellow":	This.setAreaColor(id,"blue");break;
				  case "blue":	This.setAreaColor(id,"green");break;
				  case "green":	This.setAreaColor(id,"red");break;
			  }
			  return false;
		  }
		  if(e.data.inthis.$ghost.css("display")=="none"){
			  var X,Y;
			  var ev=mousePosition(e),t=getElCoordinate(this);
			  X=ev.x-t.left+this.parentNode.parentNode.scrollLeft-1;
			  Y=ev.y-t.top+this.parentNode.parentNode.scrollTop-1;
			  var color=["red","yellow","blue","green"];
			  e.data.inthis.addArea(e.data.inthis.$id+"_area_"+e.data.inthis.$max,{name:"area_"+e.data.inthis.$max,left:X,top:Y,color:color[e.data.inthis.$max%4],width:200,height:100});
			  e.data.inthis.$max++;
			  return false;
		  }
	   });
	},
	//初始化用来改变连线的连接端点的两个小方块的操作事件
	initLinePointsChg:function(){
		this.$mpFrom.on("mousedown",{inthis:this},function(e){
			var This=e.data.inthis;
			This.switchToolBtn("cursor");
			var ps=This.$mpFrom.data("p").split(",");
			var pe=This.$mpTo.data("p").split(",");
			$(this).hide();
			This.$workArea.data("lineEnd",{"x":pe[0],"y":pe[1],"id":This.$lineData[This.$lineOper.data("tid")].to}).css("cursor","crosshair");
			var line=This.drawLine("FlowChart_tmp_line",[ps[0],ps[1]],[pe[0],pe[1]],true,true);
			This.$draw.appendChild(line);
			return false;
	   });
	   this.$mpTo.on("mousedown",{inthis:this},function(e){
			var This=e.data.inthis;
			This.switchToolBtn("cursor");
			var ps=This.$mpFrom.data("p").split(",");
			var pe=This.$mpTo.data("p").split(",");
			$(this).hide();
			This.$workArea.data("lineStart",{"x":ps[0],"y":ps[1],"id":This.$lineData[This.$lineOper.data("tid")].from}).css("cursor","crosshair");
			var line=This.drawLine("FlowChart_tmp_line",[ps[0],ps[1]],[pe[0],pe[1]],true,true);
			This.$draw.appendChild(line);
			return false;
	   });
	},
	//每一种类型结点及其按钮的说明文字
	setNodeRemarks:function(remark){
		if(this.$tool==null) {
			return;
		}
		this.$tool.children("a").each(function(){
			this.title=remark[$(this).attr("id").split("btn_")[1]];
		});
		this.$nodeRemark=remark;
	},
	
	//切换左边工具栏按钮,传参TYPE表示切换成哪种类型的按钮
	switchToolBtn:function(type){
		this.$tool.children("#"+this.$id+"_btn_"+this.$nowType.split(" ")[0]).attr("class","FlowChart_tool_btn");
		if(this.$nowType=="group"){
			this.$workArea.prepend(this.$group);
			for(var key in this.$areaDom){
				this.$areaDom[key].addClass("lock").children("div:eq(1)").css("display","none");
			}
		}
		this.$nowType=type;
		this.$tool.children("#"+this.$id+"_btn_"+type.split(" ")[0]).attr("class","FlowChart_tool_btndown");
		if(this.$nowType=="group"){
			this.blurItem();
			this.$workArea.append(this.$group);
			for(var key in this.$areaDom){
				this.$areaDom[key].removeClass("lock").children("div:eq(1)").css("display","");
			}
		}else if(this.$nowType=="direct"){
			this.blurItem();
		}
		if(this.$textArea.css("display")=="none"){
			this.$textArea.removeData("id").val("").hide();
		}
	},
	getNodeHtml:function(id,json){
		var mark=json.marked? ' item_mark':'';
		var type=json.type||'task';
		var html=[];
		if(type.indexOf(" round")<0){
			var typeColor='item_color_'+type;
			if(!json.width||json.width<100){
				json.width=180;
			}
			if(!json.height||json.height<24){
				json.height=60;
			}
			if(!json.top||json.top<0){
				json.top=100;
			}
			if(!json.left||json.left<0){
				json.left=100;
			}
			html.push("<div class='FlowChart_item",mark,"' id='",id,"' style='top:",json.top,"px;left:",json.left,"px'>");
			html.push("<table cellspacing='1' style='width:",(json.width-2),"px;height:",(json.height-2),"px;'>");
			html.push("<tr><td class='ico ",typeColor,"'><i class='ico_",type,"'></i></td>");
			html.push("<td class='node_name'>",json.name,"</td></tr>");
			html.push("</table>");
			html.push("<div style='display:none'><div class='rs_bottom'></div><div class='rs_right'></div><div class='rs_rb'></div><div class='rs_close'></div></div></div>");
		}else{
			var typeColor=' item_color_'+type;
			json.width=32;json.height=32;
			html.push("<div class='FlowChart_item item_round",mark,typeColor,"' id='",id,"' style='top:",json.top,"px;left:",json.left,"px'>");
			html.push("<table cellspacing='0'><tr><td class='ico'><i class='ico_",type,"'></i></td></tr></table>");
			html.push("<div style='display:none'><div class='rs_close'></div></div>");
			html.push("<div class='span'>");
			html.push(json.name);
			html.push("</div></div>");
		}
		return html.join('');
	},
	//增加一个流程结点,传参为一个JSON,有id,name,top,left,width,height,type(结点类型)等属性
	addNode:function(id,json){
		if(this.onItemAdd!=null&&!this.onItemAdd(id,"node",json)){
			return;
		}
		if(this.$undoStack&&this.$editable){
			this.pushOper("delNode",[id]);
		}
		
		this.$nodeDom[id]=$(this.getNodeHtml(id,json));
		
		if(FlowChart.prototype.color.node){
			if(json.type.indexOf(" mix")>-1){
				this.$nodeDom[id].css({"background-color":FlowChart.prototype.color.mix,"border-color":FlowChart.prototype.color.mix});
			}else{
				this.$nodeDom[id].css({"background-color":FlowChart.prototype.color.node,"border-color":FlowChart.prototype.color.node});
			}
			if(mark&&FlowChart.prototype.color.mark){
				this.$nodeDom[id].css({"border-color":FlowChart.prototype.color.mark});
			}
		}
		
		this.$workArea.append(this.$nodeDom[id]);
		this.$nodeData[id]=json;
		++this.$nodeCount;
		if(this.$editable){
			this.$nodeData[id].alt=true;
			if(this.$deletedItem[id]){
				delete this.$deletedItem[id];//在回退删除操作时,去掉该元素的删除记录
			}
		}
	},
	initWorkForNode:function(){
		//绑定点击事件
		this.$workArea.delegate(".FlowChart_item","click",{inthis:this},function(e){
			e.data.inthis.focusItem(this.id,true);
			$(this).removeClass("item_mark");
		});
		//绑定用鼠标移动事件
		this.$workArea.delegate(".ico","mousedown",{inthis:this},function(e){
			if(!e){
				e=window.event;
			}
			if(e.button==2){
				return false;
			}
			var This=e.data.inthis;
			if(This.$nowType=="direct"){
				return;
			}
			var Dom=$(this).parents(".FlowChart_item");
			var id=Dom.attr("id"),thisNode=This.$nodeData[id];
			var workAreaParent=This.$workArea[0].parentNode;
			This.focusItem(id,true);
			var hack=browserNavigator(1,0);
			var ev=mousePosition(e),t=getElCoordinate(This.$workArea[0]);
			Dom.children("table").clone().prependTo(This.$ghost); 
			var X=ev.x-t.left+workAreaParent.scrollLeft;
			var Y=ev.y-t.top+workAreaParent.scrollTop;
			var vX=X-thisNode.left,vY=Y-thisNode.top;
			var isMove=false;
			document.onmousemove=function(e){
				if(!e){e=window.event;}
				var ev=mousePosition(e);
				if(X==ev.x-vX&&Y==ev.y-vY){
					return false;
				}
				X=ev.x-vX;Y=ev.y-vY;
				
				if(isMove&&This.$ghost.css("display")=="none"){
					This.$ghost.css({display:"block",
						width:thisNode.width-2+"px",
						height:thisNode.height-2+"px",
						cursor:"move"
					});
				}    

				if(X<t.left-workAreaParent.scrollLeft){
					X=t.left-workAreaParent.scrollLeft;
				}else if(X+workAreaParent.scrollLeft+thisNode.width>t.left+This.$workArea.width()){
					X=t.left+This.$workArea.width()-workAreaParent.scrollLeft-thisNode.width;
				}
				if(Y<t.top-workAreaParent.scrollTop){
					Y=t.top-workAreaParent.scrollTop;
				}else if(Y+workAreaParent.scrollTop+thisNode.height>t.top+This.$workArea.height()){
					Y=t.top+This.$workArea.height()-workAreaParent.scrollTop-thisNode.height;
				}
				This.$ghost.css({left:X+hack+"px",top:Y+hack+"px"});
				isMove=true;  
			};
			document.onmouseup=function(e){
				if(isMove){
					This.moveNode(id,X+This.$workArea[0].parentNode.scrollLeft-t.left,Y+This.$workArea[0].parentNode.scrollTop-t.top);
				}
				This.$ghost.empty().hide();
				document.onmousemove=null;
				document.onmouseup=null;
			};
		});
		if(!this.$editable){
			return;
		}
		//绑定鼠标覆盖/移出事件
		this.$workArea.delegate(".FlowChart_item","mouseenter",{inthis:this},function(e){
			if(e.data.inthis.$nowType!="direct"&&!document.getElementById("FlowChart_tmp_line")){
				return;
			}
			$(this).addClass("item_mark").addClass("crosshair").css("border-color",FlowChart.prototype.color.mark||"#ff3300");
		});
		this.$workArea.delegate(".FlowChart_item","mouseleave",{inthis:this},function(e){
			if(e.data.inthis.$nowType!="direct"&&!document.getElementById("FlowChart_tmp_line")){
				return;
			}
			$(this).removeClass("item_mark").removeClass("crosshair");
			if(this.id==e.data.inthis.$focus){
				$(this).css("border-color",FlowChart.prototype.color.line||"#3892D3");
			}else{
				$(this).css("border-color",FlowChart.prototype.color.node||"#A1DCEB");
			}
		});
		//绑定连线时确定初始点
		this.$workArea.delegate(".FlowChart_item","mousedown",{inthis:this},function(e){
			if(e.button==2){
				return false;
			}
			var This=e.data.inthis;
			if(This.$nowType!="direct"){
				return;
			}
			var ev=mousePosition(e),t=getElCoordinate(This.$workArea[0]);
			var X,Y;
			X=ev.x-t.left+This.$workArea[0].parentNode.scrollLeft;
			Y=ev.y-t.top+This.$workArea[0].parentNode.scrollTop;
			This.$workArea.data("lineStart",{"x":X,"y":Y,"id":this.id}).css("cursor","crosshair");
			var line=This.drawLine("FlowChart_tmp_line",[X,Y],[X,Y],true,true);
			This.$draw.appendChild(line);
		});
		//绑定连线时确定结束点
		this.$workArea.delegate(".FlowChart_item","mouseup",{inthis:this},function(e){
			var This=e.data.inthis;
			if(This.$nowType!="direct"&&!This.$mpTo.data("p")){
				return;
			}
			var lineStart=This.$workArea.data("lineStart");
			var lineEnd=This.$workArea.data("lineEnd");
			if(lineStart&&!This.$mpTo.data("p")){
				This.addLine(This.$id+"_line_"+This.$max,{from:lineStart.id,to:this.id,name:""});
				This.$max++;
			}else{
				if(lineStart){
					This.moveLinePoints(This.$focus,lineStart.id,this.id);
				}else if(lineEnd){
					This.moveLinePoints(This.$focus,this.id,lineEnd.id);
				}
				if(!This.$nodeData[this.id].marked){
					$(this).removeClass("item_mark");
					if(this.id!=This.$focus){
						$(this).css("border-color",FlowChart.prototype.color.node);
					} else{
						$(this).css("border-color",FlowChart.prototype.color.line);
					}
				}
			}
		});
		//绑定双击编辑事件
		this.$workArea.delegate(".FlowChart_item > .span","dblclick",{inthis:this},function(e){
			var oldTxt=this.innerHTML;
			var This=e.data.inthis;
			var id=this.parentNode.id;
			var t=getElCoordinate(This.$workArea[0]);
			This.$textArea.val(oldTxt).css({display:"block",height:$(this).height(),width:100,
				left:t.left+This.$nodeData[id].left-This.$workArea[0].parentNode.scrollLeft-24,
				top:t.top+This.$nodeData[id].top-This.$workArea[0].parentNode.scrollTop+26})
				.data("id",This.$focus).focus();
			This.$workArea.parent().one("mousedown",function(e){
				if(e.button==2){return false;}
				This.setName(This.$textArea.data("id"),This.$textArea.val(),"node");
				This.$textArea.val("").removeData("id").hide();
			});
		});
		this.$workArea.delegate(".ico + td","dblclick",{inthis:this},function(e){
			var oldTxt=this.innerHTML;
			var This=e.data.inthis;
			var id=$(this).parents(".FlowChart_item").attr("id");
			var t=getElCoordinate(This.$workArea[0]);
			This.$textArea.val(oldTxt).css({display:"block",width:$(this).width()+24,height:$(this).height(),
				left:t.left+24+This.$nodeData[id].left-This.$workArea[0].parentNode.scrollLeft,
				top:t.top+2+This.$nodeData[id].top-This.$workArea[0].parentNode.scrollTop})
				.data("id",This.$focus).focus();
			This.$workArea.parent().one("mousedown",function(e){
				if(e.button==2){return false;}
				This.setName(This.$textArea.data("id"),This.$textArea.val(),"node");
				This.$textArea.val("").removeData("id").hide();
			});
		});
		//绑定结点的删除功能
		this.$workArea.delegate(".rs_close","click",{inthis:this},function(e){
			if(!e){
				e=window.event;
			}
			e.data.inthis.delNode(e.data.inthis.$focus);
			return false;
		});
		//绑定结点的RESIZE功能
		this.$workArea.delegate(".FlowChart_item > div > div[class!=rs_close]","mousedown",{inthis:this},function(e){
			if(!e){e=window.event;}
			if(e.button==2){return false;}
			var cursor=$(this).css("cursor");
			if(cursor=="pointer"){return;}
			var This=e.data.inthis;
			var id=This.$focus;
			This.switchToolBtn("cursor");
			e.cancelBubble = true;
			e.stopPropagation();
			var hack=browserNavigator(1,0);
			var ev=mousePosition(e),t=getElCoordinate(This.$workArea[0]);
			This.$ghost.css({display:"block",
				width:This.$nodeData[id].width-2+"px", height:This.$nodeData[id].height-2+"px",
				top:This.$nodeData[id].top+t.top-This.$workArea[0].parentNode.scrollTop+hack+"px",
				left:This.$nodeData[id].left+t.left-This.$workArea[0].parentNode.scrollLeft+hack+"px",cursor:cursor
			});
			var X,Y;
			X=ev.x-t.left+This.$workArea[0].parentNode.scrollLeft;
			Y=ev.y-t.top+This.$workArea[0].parentNode.scrollTop;
			var vX=(This.$nodeData[id].left+This.$nodeData[id].width)-X;
			var vY=(This.$nodeData[id].top+This.$nodeData[id].height)-Y;
			var isMove=false;
			This.$ghost.css("cursor",cursor);
			document.onmousemove=function(e){
				if(!e){e=window.event;}
				var ev=mousePosition(e);
				X=ev.x-t.left+This.$workArea[0].parentNode.scrollLeft-This.$nodeData[id].left+vX;
				Y=ev.y-t.top+This.$workArea[0].parentNode.scrollTop-This.$nodeData[id].top+vY;
				if(X<100){X=100;}
				if(Y<24){Y=24;}
				isMove=true;
				switch(cursor){
					case "nw-resize":This.$ghost.css({width:X-2+"px",height:Y-2+"px"});break;
					case "w-resize":This.$ghost.css({width:X-2+"px"});break;
					case "n-resize":This.$ghost.css({height:Y-2+"px"});break;
				}
			};
			document.onmouseup=function(e){
				This.$ghost.hide();
				if(!isMove){return;}
				if(!e){e=window.event;}
				This.resizeNode(id,This.$ghost.outerWidth(),This.$ghost.outerHeight());
				document.onmousemove=null;
				document.onmouseup=null;
	  		};
		});
	},
	//获取结点/连线/分组区域的详细信息
	getItemInfo:function(id,type){
		switch(type){
			case "node":	return this.$nodeData[id]||null;
			case "line":	return this.$lineData[id]||null;
			case "area":	return this.$areaData[id]||null;
		}
	},
	//取消所有结点/连线被选定的状态
	blurItem:function(){
		if (this.$focus != "") {
			var jq = $("#" + this.$focus);
			if (jq.prop("tagName") == "DIV") {
				if (this.onItemBlur != null && !this.onItemBlur(this.$focus, "node")) {
					return false;
				}
				jq.removeClass("item_focus").children("div:eq(0)").css("display", "none");
				if (FlowChart.prototype.color.line) {
					if (this.$nodeData[this.$focus].marked) {
						jq.css("border-color", FlowChart.prototype.color.mark || "#ff3300");
					} else {
						jq.css("border-color", FlowChart.prototype.color.node || "#A1DCEB");
					}
				}
			} else {
				if (this.onItemBlur != null && !this.onItemBlur(this.$focus, "line")) return false;
				if (FlowChart.prototype.useSVG != "") {
					if (!this.$lineData[this.$focus].marked) {
						jq[0].childNodes[1].setAttribute("stroke", FlowChart.prototype.color.line || "#000000");
						jq[0].childNodes[1].setAttribute("marker-end", "url(#arrow1)");
					}
				} else {
					if (!this.$lineData[this.$focus].marked){
						jq[0].strokeColor = FlowChart.prototype.color.line || "#000000";
					}
				}
				this.$lineMove.hide().removeData("type").removeData("tid");
				if (this.$editable) {
					this.$lineOper.hide().removeData("tid");
					this.$mpFrom.hide().removeData("p");
					this.$mpTo.hide().removeData("p");
				}
			}
		}
		this.$focus = "";
		return true;
	},
	//选定某个结点/转换线 bool:TRUE决定了要触发选中事件，FALSE则不触发选中事件，多用在程序内部调用。
	focusItem:function(id,bool){
		var jq=$("#"+id);
		if(jq.length==0){
			return;
		}
		if(!this.blurItem()){
			return;//先执行"取消选中",如果返回FLASE,则也会阻止选定事件继续进行.
		}
		if(jq.prop("tagName")=="DIV"){
			if(bool&&this.onItemFocus!=null&&!this.onItemFocus(id,"node")){
				return;
			}
			jq.addClass("item_focus");
			if(FlowChart.prototype.color.line){
				jq.css("border-color",FlowChart.prototype.color.line);
			}
			if(this.$editable){
				jq.children("div:eq(0)").css("display","block");
			}
			this.$workArea.append(jq);
		}else{//如果是连接线
			if(this.onItemFocus!=null&&!this.onItemFocus(id,"line")){
				return;
			}
			if(FlowChart.prototype.useSVG!=""){
				jq[0].childNodes[1].setAttribute("stroke",FlowChart.prototype.color.mark||"#ff3300");
				jq[0].childNodes[1].setAttribute("marker-end","url(#arrow2)");
			}else{
				jq[0].strokeColor=FlowChart.prototype.color.mark||"#ff3300";
			}
			if(!this.$editable){
				return;
			}
			var x,y,from,to,n;
			if(FlowChart.prototype.useSVG!=""){
				from=jq.attr("from").split(",");
				to=jq.attr("to").split(",");
				n=[from[0],from[1],to[0],to[1]];
			}else{
				n=jq[0].getAttribute("fromTo").split(",");
				from=[n[0],n[1]];
				to=[n[2],n[3]];
			}
			from[0]=parseInt(from[0],10);
			from[1]=parseInt(from[1],10);
			to[0]=parseInt(to[0],10);
			to[1]=parseInt(to[1],10);
			//var t=getElCoordinate(this.$workArea[0]);
			if(this.$lineData[id].type=="lr"){
				from[0]=this.$lineData[id].M;
				to[0]=from[0];
				this.$lineMove.css({
					width:"5px",height:(to[1]-from[1])*(to[1]>from[1]? 1:-1)+"px",
					left:from[0]-3+"px",
					top:(to[1]>from[1]? from[1]:to[1])+1+"px",
					cursor:"e-resize",display:"block"
				}).data({"type":"lr","tid":id});
			}else if(this.$lineData[id].type=="tb"){
				from[1]=this.$lineData[id].M;
				to[1]=from[1];
				this.$lineMove.css({
					width:(to[0]-from[0])*(to[0]>from[0]? 1:-1)+"px",height:"5px",
					left:(to[0]>from[0]? from[0]:to[0])+1+"px",
					top:from[1]-3+"px",
					cursor:"s-resize",display:"block"
				}).data({"type":"tb","tid":id});
			}
			x=(from[0]+to[0])/2-35;
			y=(from[1]+to[1])/2+6;
			this.$lineOper.css({display:"block",left:x+"px",top:y+"px"}).data("tid",id);
			if(this.$editable){
				this.$mpFrom.css({display:"block",left:n[0]-4+"px",top:n[1]-4+"px"}).data("p",n[0]+","+n[1]);
				this.$mpTo.css({display:"block",left:n[2]-4+"px",top:n[3]-4+"px"}).data("p",n[2]+","+n[3]);
			}
			this.$draw.appendChild(jq[0]);
		}
		this.$focus=id;
		this.switchToolBtn("cursor");
	},
	//移动结点到一个新的位置
	moveNode:function(id,left,top){
		if(!this.$nodeData[id]){
			return;
		}
		if(this.onItemMove!=null&&!this.onItemMove(id,"node",left,top)){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$nodeData[id].left,this.$nodeData[id].top];
			this.pushOper("moveNode",paras);
		}
		if(left<0){
			left=0;
		}
		if(top<0){
			top=0;
		}
		$("#"+id).css({left:left+"px",top:top+"px"});
		this.$nodeData[id].left=left;
		this.$nodeData[id].top=top;
		//重画转换线
		this.resetLines(id,this.$nodeData[id]);
		if(this.$editable){
			this.$nodeData[id].alt=true;
		}
	},
	//设置结点/连线/分组区域的文字信息
	setName:function(id,name,type){
		var oldName;
		if(type=="node"){//如果是结点
			if(!this.$nodeData[id])	return;
			if(this.$nodeData[id].name==name)	return;
			if(this.onItemRename!=null&&!this.onItemRename(id,name,"node"))	return;
			oldName=this.$nodeData[id].name;
			this.$nodeData[id].name=name;
			if(this.$nodeData[id].type.indexOf("round")>1){
				this.$nodeDom[id].children(".span").text(name);
			}else{
				this.$nodeDom[id].find("span.node_name").text(name);
				/*var width=this.$nodeDom[id].outerWidth();
				var height=this.$nodeDom[id].outerHeight();
				this.$nodeDom[id].children("table").css({width:width-2+"px",height:height-2+"px"});
				this.$nodeData[id].width=width;
				this.$nodeData[id].height=height;*/
			}
			if(this.$editable){
				this.$nodeData[id].alt=true;
			}
			//重画转换线
			this.resetLines(id,this.$nodeData[id]);
		}else if(type=="line"){//如果是线
			if(!this.$lineData[id]){
				return;
			}
			if(this.$lineData[id].name==name){
				return;
			}
			if(this.onItemRename!=null&&!this.onItemRename(id,name,"line")){
				return;
			}
			oldName=this.$lineData[id].name;
			this.$lineData[id].name=name;
			if(FlowChart.prototype.useSVG!=""){
				this.$lineDom[id].childNodes[2].innerHTML=name;
			}else{
				this.$lineDom[id].childNodes[1].innerHTML=name;
				var n=this.$lineDom[id].getAttribute("fromTo").split(",");
				var x;
				if(this.$lineData[id].type!="lr"){
					x=(n[2]-n[0])/2;
				}else{
					var Min=n[2]>n[0]? n[0]:n[2];
					if(Min>this.$lineData[id].M) Min=this.$lineData[id].M;
					x=this.$lineData[id].M-Min;
				}
				if(x<0){
					x=x*-1;
				}
				this.$lineDom[id].childNodes[1].style.left=x-this.$lineDom[id].childNodes[1].offsetWidth/2+4+"px";
			}
			if(this.$editable){
				this.$lineData[id].alt=true;
			}
		}else if(type=="area"){//如果是分组区域
			if(!this.$areaData[id])	{
				return;
			}
			if(this.$areaData[id].name==name){
				return;
			}
			if(this.onItemRename!=null&&!this.onItemRename(id,name,"area")){
				return;
			}
			oldName=this.$areaData[id].name;
			this.$areaData[id].name=name;
			this.$areaDom[id].children("label").text(name);
			if(this.$editable){
				this.$areaData[id].alt=true;
			}
		}
		if(this.$undoStack){
			var paras=[id,oldName,type];
			this.pushOper("setName",paras);
		}
	},
	//设置结点的尺寸,仅支持非开始/结束结点
	resizeNode:function(id,width,height){
		if(!this.$nodeData[id])	{
			return;
		}
		if(this.onItemResize!=null&&!this.onItemResize(id,"node",width,height)){
			return;
		}
		if(this.$nodeData[id].type=="start"||this.$nodeData[id].type=="end"){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$nodeData[id].width,this.$nodeData[id].height];
			this.pushOper("resizeNode",paras);
		}
		var hack=browserNavigator(0,2);
		this.$nodeDom[id].children("table").css({width:width-2+"px",height:height-2+"px"});
		width=this.$nodeDom[id].outerWidth()-hack;
		height=this.$nodeDom[id].outerHeight()-hack;
		this.$nodeDom[id].children("table").css({width:width-2+"px",height:height-2+"px"});
		this.$nodeData[id].width=width;
		this.$nodeData[id].height=height;
		if(this.$editable){
			this.$nodeData[id].alt=true;
		}
		//重画转换线
		this.resetLines(id,this.$nodeData[id]);
	},
	//删除结点
	delNode:function(id){
		if(!this.$nodeData[id]){
			return;
		}
		if(this.onItemDel!=null&&!this.onItemDel(id,"node")){
			return;
		}
		//先删除可能的连线
		for(var k in this.$lineData){
			if(this.$lineData[k].from==id||this.$lineData[k].to==id){
				//this.$draw.removeChild(this.$lineDom[k]);
				//delete this.$lineData[k];
				//delete this.$lineDom[k];
				this.delLine(k);
			}
		}
		//再删除结点本身
		if(this.$undoStack){
			var paras=[id,this.$nodeData[id]];
			this.pushOper("addNode",paras);
		}
		delete this.$nodeData[id];
		this.$nodeDom[id].remove();
		delete this.$nodeDom[id];
		--this.$nodeCount;
		if(this.$focus==id){
			this.$focus="";
	    }
		if(this.$editable){
			//在回退新增操作时,如果节点ID以this.$id+"_node_"开头,则表示为本次编辑时新加入的节点,这些节点的删除不用加入到$deletedItem中
			if(id.indexOf(this.$id+"_node_")<0){
				this.$deletedItem[id]="node";
			}
		}
	},
	//设置流程图的名称
	setTitle:function(text){
		this.$title=text;
		if(this.$head){
			this.$head.children("label").attr("title",text).text(text);
		}
	},
	//载入一组数据
	loadData:function(data){
		var t=this.$editable;
		this.$editable=false;
		if(data.title){
			this.setTitle(data.title);
		}
		if(data.initNum){
			this.$max=data.initNum;
		}
		for(var i in data.nodes){
			this.addNode(i,data.nodes[i]);
		}
		for(var j in data.lines){
			this.addLine(j,data.lines[j]);
		}
		for(var k in data.areas){
			this.addArea(k,data.areas[k]);
		}
		this.$editable=t;
		this.$deletedItem={};
	},
	//用AJAX方式，远程读取一组数据
	//参数para为JSON结构，与JQUERY中$.ajax()方法的传参一样
	loadDataAjax:function(para){
		var This=this;
		$.ajax({
			type:para.type,
			url:para.url,
			dataType:"json",
			data:para.data,
			success: function(msg){
				if(para.dataFilter)	para.dataFilter(msg,"json");
     			This.loadData(msg);
				if(para.success)	para.success(msg);
   			},
			error: function(XMLHttpRequest, textStatus, errorThrown){
				if(para.error)	para.error(textStatus,errorThrown);
			}
		})
	},
	//把画好的整个流程图导出到一个变量中(其实也可以直接访问FlowChart对象的$nodeData,$lineData,$areaData这三个JSON属性)
	exportData:function(){
		var ret={title:this.$title,nodes:this.$nodeData,lines:this.$lineData,areas:this.$areaData,initNum:this.$max};
		for(var k1 in ret.nodes){
			if(!ret.nodes[k1].marked){
				delete ret.nodes[k1]["marked"];
			}
		}
		for(var k2 in ret.lines){
			if(!ret.lines[k2].marked){
				delete ret.lines[k2]["marked"];
			}
		}
		return ret;
	},
	//只把本次编辑流程图中作了变更(包括增删改)的元素导出到一个变量中,以方便用户每次编辑载入的流程图后只获取变更过的数据
	exportAlter:function(){
		var ret={nodes:{},lines:{},areas:{}};
		for(var k1 in this.$nodeData){
			if(this.$nodeData[k1].alt){
				ret.nodes[k1]=this.$nodeData[k1];
			}
		}
		for(var k2 in this.$lineData){
			if(this.$lineData[k2].alt){
				ret.lines[k2]=this.$lineData[k2];
			}
		}
		for(var k3 in this.$areaData){
			if(this.$areaData[k3].alt){
				ret.areas[k3]=this.$areaData[k3];
			}
		}
		ret.deletedItem=this.$deletedItem;
		return ret;
	},
	getNodeData:function(){
		return this.$nodeData;
	},
	//变更元素的ID,一般用于快速保存后,将后台返回新元素的ID更新到页面中;type为元素类型(节点,连线,区块)
	transNewId:function(oldId,newId,type){
		var tmp;
		switch(type){
			case "node":
			if(this.$nodeData[oldId]){
				tmp=this.$nodeData[oldId];
				delete this.$nodeData[oldId];
				this.$nodeData[newId]=tmp;
				tmp=this.$nodeDom[oldId].attr("id",newId);
				delete this.$nodeDom[oldId];
				this.$nodeDom[newId]=tmp;
			}
			break;
			case "line":
			if(this.$lineData[oldId]){
				tmp=this.$lineData[oldId];
				delete this.$lineData[oldId];
				this.$lineData[newId]=tmp;
				tmp=this.$lineDom[oldId].attr("id",newId);
				delete this.$lineDom[oldId];
				this.$lineDom[newId]=tmp;
			}
			break;
			case "area":
			if(this.$areaData[oldId]){
				tmp=this.$areaData[oldId];
				delete this.$areaData[oldId];
				this.$areaData[newId]=tmp;
				tmp=this.$areaDom[oldId].attr("id",newId);
				delete this.$areaDom[oldId];
				this.$areaDom[newId]=tmp;
			}
			break;
		}
	},
	//清空工作区及已载入的数据
	clearData:function(){
		for(var key in this.$nodeData){
			this.delNode(key);
		}
		for(var key in this.$lineData){
			this.delLine(key);
		}
		for(var key in this.$areaData){
			this.delArea(key);
		}
		this.$deletedItem={};
	},
	//销毁自己
	destrory:function(){
		this.$bgDiv.empty();
		this.$lineData=null;
		this.$nodeData=null;
		this.$lineDom=null;
		this.$nodeDom=null;
		this.$areaDom=null;
		this.$areaData=null;
		this.$nodeCount=0;
		this.$areaCount=0;
		this.$areaCount=0;
		this.$deletedItem={};
	},
	/***以下为有关画线的方法***/
	//绘制一条箭头线，并返回线的DOM
	drawLine:function(id,sp,ep,mark,dash){
		var line,strokeWidth=this.getLineStrokeWidth();
		var _lineTextStyle=this.getLineTextStyle();
		if(FlowChart.prototype.useSVG!=""){
			line=document.createElementNS("http://www.w3.org/2000/svg","g");
			var hi=document.createElementNS("http://www.w3.org/2000/svg","path");
			var path=document.createElementNS("http://www.w3.org/2000/svg","path");

			if(id!=""){
				line.setAttribute("id",id);
			}
			line.setAttribute("from",sp[0]+","+sp[1]);
			line.setAttribute("to",ep[0]+","+ep[1]);
			hi.setAttribute("visibility","hidden");
			hi.setAttribute("stroke-width",9);
			hi.setAttribute("fill","none");
			hi.setAttribute("stroke","white");
			hi.setAttribute("d","M "+sp[0]+" "+sp[1]+" L "+ep[0]+" "+ep[1]);
			hi.setAttribute("pointer-events","stroke");
			path.setAttribute("d","M "+sp[0]+" "+sp[1]+" L "+ep[0]+" "+ep[1]);
			path.setAttribute("stroke-width",strokeWidth);
			path.setAttribute("stroke-linecap","round");
			path.setAttribute("fill","none");
			if(dash)	path.setAttribute("style", "stroke-dasharray:6,5");
			if(mark){
				path.setAttribute("stroke",FlowChart.prototype.color.mark||"#ff3300");
				path.setAttribute("marker-end","url(#arrow2)");
			}else{
				path.setAttribute("stroke",FlowChart.prototype.color.line||"#000000");
				path.setAttribute("marker-end","url(#arrow1)");
			}
			line.appendChild(hi);
			line.appendChild(path);
			line.style.cursor="crosshair";
			if(id!=""&&id!="FlowChart_tmp_line"){
				var text=document.createElementNS("http://www.w3.org/2000/svg","text");
				text.setAttribute("fill",FlowChart.prototype.color.font||"#333");
				line.appendChild(text);
				var x=(ep[0]+sp[0])/2;
				var y=(ep[1]+sp[1])/2;
				y=y-this.getLineTopDiff(5);
				text.setAttribute("text-anchor","middle");
				text.setAttribute("x",x);
				text.setAttribute("y",y);
				line.style.cursor="pointer";
				text.style.cssText=_lineTextStyle;
			}
		}else{
			line=document.createElement("v:polyline");
			if(id!=""){
				line.id=id;
			}
			//line.style.position="absolute";
			line.points.value=sp[0]+","+sp[1]+" "+ep[0]+","+ep[1];
			line.setAttribute("fromTo",sp[0]+","+sp[1]+","+ep[0]+","+ep[1]);
			line.strokeWeight=strokeWidth;
			line.stroke.EndArrow="Block";
			line.style.cursor="crosshair";
			if(id!=""&&id!="FlowChart_tmp_line"){
				var text=document.createElement("div");
				//text.innerHTML=id;
				line.appendChild(text);
				var x=(ep[0]-sp[0])/2;
				var y=(ep[1]-sp[1])/2;
				if(x<0){
					x=x*-1;
				}
				if(y<0){
					y=y*-1;
				}
				y=y-this.getLineTopDiff(11);
				text.style.cssText=_lineTextStyle+"left:"+x+"px;top:"+y+"px;";
				line.style.cursor="pointer";
			}
			if(dash){
				line.stroke.dashstyle="Dash";
			}
			if(mark){
				line.strokeColor=FlowChart.prototype.color.mark||"#ff3300";
			}else {
				line.strokeColor=FlowChart.prototype.color.line||"#000000";
			}
			line.fillColor=FlowChart.prototype.color.line||"#000000";
		}
		return line;
	},
	//画一条只有两个中点的折线
	drawPoly:function(id,sp,m1,m2,ep,mark){
		var poly,strPath,strokeWidth=this.getLineStrokeWidth();
		var _lineTextStyle=this.getLineTextStyle();
		if(FlowChart.prototype.useSVG!=""){
			poly=document.createElementNS("http://www.w3.org/2000/svg","g");
			var hi=document.createElementNS("http://www.w3.org/2000/svg","path");
			var path=document.createElementNS("http://www.w3.org/2000/svg","path");
			if(id!=""){
				poly.setAttribute("id",id);
			}
			poly.setAttribute("from",sp[0]+","+sp[1]);
			poly.setAttribute("to",ep[0]+","+ep[1]);
			hi.setAttribute("visibility","hidden");
			hi.setAttribute("stroke-width",strokeWidth);
			hi.setAttribute("fill","none");
			hi.setAttribute("stroke","white");
			strPath="M "+sp[0]+" "+sp[1];
			if(m1[0]!=sp[0]||m1[1]!=sp[1]){
				strPath+=" L "+m1[0]+" "+m1[1];
			}
			if(m2[0]!=ep[0]||m2[1]!=ep[1]){
				strPath+=" L "+m2[0]+" "+m2[1];
			}
			strPath+=" L "+ep[0]+" "+ep[1];
			hi.setAttribute("d",strPath);
			hi.setAttribute("pointer-events","stroke");
			path.setAttribute("d",strPath);
			path.setAttribute("stroke-width",strokeWidth);
			path.setAttribute("stroke-linecap","round");
			path.setAttribute("fill","none");
			if(mark){
				path.setAttribute("stroke",FlowChart.prototype.color.mark||"#ff3300");
				path.setAttribute("marker-end","url(#arrow2)");
			}else{
				path.setAttribute("stroke",FlowChart.prototype.color.line||"#000000");
				path.setAttribute("marker-end","url(#arrow1)");
			}
			poly.appendChild(hi);
			poly.appendChild(path);
			var text=document.createElementNS("http://www.w3.org/2000/svg","text");
			text.setAttribute("fill",FlowChart.prototype.color.font||"#333");
			poly.appendChild(text);
			var x=(m2[0]+m1[0])/2;
			var y=(m2[1]+m1[1])/2;
			y=y-this.getLineTopDiff(5);
			text.setAttribute("text-anchor","middle");
			text.setAttribute("x",x);
			text.setAttribute("y",y);
			text.style.cssText=_lineTextStyle;
			poly.style.cursor="pointer";
		}else{
			poly=document.createElement("v:Polyline");
			if(id!=""){
				poly.id=id;
			}
			poly.filled="false";
			strPath=sp[0]+","+sp[1];
			if(m1[0]!=sp[0]||m1[1]!=sp[1]){
				strPath+=" "+m1[0]+","+m1[1];
			}
			if(m2[0]!=ep[0]||m2[1]!=ep[1]){
				strPath+=" "+m2[0]+","+m2[1];
			}
			strPath+=" "+ep[0]+","+ep[1];
			poly.points.value=strPath;
			poly.setAttribute("fromTo",sp[0]+","+sp[1]+","+ep[0]+","+ep[1]);
			poly.strokeWeight=strokeWidth;
			poly.stroke.EndArrow="Block";
			var text=document.createElement("div");
			poly.appendChild(text);
			var x=(m2[0]-m1[0])/2;
			var y=(m2[1]-m1[1])/2;
			if(x<0){
				x=x*-1;
			}
			if(y<0){
				y=y*-1;
			}
			y=y-this.getLineTopDiff(11);
			text.style.cssText=_lineTextStyle+"left:"+x+"px;top:"+y+"px;display:none;";
			poly.style.cursor="pointer";
			if(mark){
				poly.strokeColor=FlowChart.prototype.color.mark||"#ff3300";
			}else{
				poly.strokeColor=FlowChart.prototype.color.line||"#000000";
			}
			setTimeout(function(){
				text.style.display='inline-block';
			},0);
		}
		return poly;
	},
	//计算两个结点间要连直线的话，连线的开始坐标和结束坐标
	calcStartEnd:function(n1,n2){
		var X_1,Y_1,X_2,Y_2;
		//X判断：
		var x11=n1.left,x12=n1.left+n1.width,x21=n2.left,x22=n2.left+n2.width;
		//结点2在结点1左边
		if(x11>=x22){
			X_1=x11;X_2=x22;
		}else if(x12<=x21){//结点2在结点1右边
			X_1=x12;X_2=x21;
		}else if(x11<=x21&&x12>=x21&&x12<=x22){//结点2在结点1水平部分重合
			X_1=(x12+x21)/2;X_2=X_1;
		}else if(x11>=x21&&x12<=x22){
			X_1=(x11+x12)/2;X_2=X_1;
		}else if(x21>=x11&&x22<=x12){
			X_1=(x21+x22)/2;X_2=X_1;
		}else if(x11<=x22&&x12>=x22){
			X_1=(x11+x22)/2;X_2=X_1;
		}
		//Y判断：
		var y11=n1.top,y12=n1.top+n1.height,y21=n2.top,y22=n2.top+n2.height;
		//结点2在结点1上边
		if(y11>=y22){
			Y_1=y11;Y_2=y22;
		}else if(y12<=y21){//结点2在结点1下边
			Y_1=y12;Y_2=y21;
		}else if(y11<=y21&&y12>=y21&&y12<=y22){//结点2在结点1垂直部分重合
			Y_1=(y12+y21)/2;Y_2=Y_1;
		}else if(y11>=y21&&y12<=y22){
			Y_1=(y11+y12)/2;Y_2=Y_1;
		}else if(y21>=y11&&y22<=y12){
			Y_1=(y21+y22)/2;Y_2=Y_1;
		}else if(y11<=y22&&y12>=y22){
			Y_1=(y11+y22)/2;Y_2=Y_1;
		}
		return {"start":[X_1,Y_1],"end":[X_2,Y_2]};
	},
	//计算两个结点间要连折线的话，连线的所有坐标
	calcPolyPoints:function(n1,n2,type,M){
		//开始/结束两个结点的中心
		var SP={x:n1.left+n1.width/2,y:n1.top+n1.height/2};
		var EP={x:n2.left+n2.width/2,y:n2.top+n2.height/2};
		var sp=[],m1=[],m2=[],ep=[];
		//如果是允许中段可左右移动的折线,则参数M为可移动中段线的X坐标
		//粗略计算起始点
		sp=[SP.x,SP.y];
		ep=[EP.x,EP.y];
		if(type=="lr"){
			//粗略计算2个中点
			m1=[M,SP.y];
			m2=[M,EP.y];
			//再具体分析修改开始点和中点1
			if(m1[0]>n1.left&&m1[0]<n1.left+n1.width){
				m1[1]=(SP.y>EP.y? n1.top:n1.top+n1.height);
				sp[0]=m1[0];sp[1]=m1[1];
			}else{
				sp[0]=(m1[0]<n1.left? n1.left:n1.left+n1.width)
			}
			//再具体分析中点2和结束点
			if(m2[0]>n2.left&&m2[0]<n2.left+n2.width){
				m2[1]=(SP.y>EP.y? n2.top+n2.height:n2.top);
				ep[0]=m2[0];ep[1]=m2[1];
			}else{
				ep[0]=(m2[0]<n2.left? n2.left:n2.left+n2.width)
			}
		}else if(type=="tb"){//如果是允许中段可上下移动的折线,则参数M为可移动中段线的Y坐标
			//粗略计算2个中点
			m1=[SP.x,M];
			m2=[EP.x,M];
			//再具体分析修改开始点和中点1
			if(m1[1]>n1.top&&m1[1]<n1.top+n1.height){
				m1[0]=(SP.x>EP.x? n1.left:n1.left+n1.width);
				sp[0]=m1[0];sp[1]=m1[1];
			}else{
				sp[1]=(m1[1]<n1.top? n1.top:n1.top+n1.height)
			}
			//再具体分析中点2和结束点
			if(m2[1]>n2.top&&m2[1]<n2.top+n2.height){
				m2[0]=(SP.x>EP.x? n2.left+n2.width:n2.left);
				ep[0]=m2[0];ep[1]=m2[1];
			}else{
				ep[1]=(m2[1]<n2.top? n2.top:n2.top+n2.height);
			}
		}else if(type=="olr"){
			m1=[M,SP.y];
			m2=[M,EP.y];
			if(SP.y==EP.y){
				m2=m1=[(SP.x+EP.x)/2,SP.y];
			}
			if(m1[0]>n1.left&&m1[0]<n1.left+n1.width){
				m1[1]=(SP.y>EP.y? n1.top:n1.top+n1.height);
				sp[0]=m1[0];sp[1]=m1[1];
			}else{
				sp[0]=(m1[0]<n1.left? n1.left:n1.left+n1.width)
			}
			if(m2[0]>n2.left&&m2[0]<n2.left+n2.width){
				m2[1]=(SP.y>EP.y? n2.top+n2.height:n2.top);
				ep[0]=m2[0];ep[1]=m2[1];
			}else{
				ep[0]=(m2[0]<n2.left? n2.left:n2.left+n2.width)
			}
		}else if(type=="otb"){
			m1=[SP.x,M];
			m2=[EP.x,M];
			if(SP.x==EP.x){
				m2=m1=[SP.x,(SP.y+EP.y)/2];
			}
			if(m1[1]>n1.top&&m1[1]<n1.top+n1.height){
				m1[0]=(SP.x>EP.x? n1.left:n1.left+n1.width);
				sp[0]=m1[0];sp[1]=m1[1];
			}else{
				sp[1]=(m1[1]<n1.top? n1.top:n1.top+n1.height)
			}
			if(m2[1]>n2.top&&m2[1]<n2.top+n2.height){
				m2[0]=(SP.x>EP.x? n2.left+n2.width:n2.left);
				ep[0]=m2[0];ep[1]=m2[1];
			}else{
				ep[1]=(m2[1]<n2.top? n2.top:n2.top+n2.height);
			}
		}
		return {start:sp,m1:m1,m2:m2,end:ep};
	},
	//初始化折线中段的X/Y坐标,mType='lr'时为X坐标,mType='tb'时为Y坐标
	getMValue:function(n1,n2,mType){
		if(mType=="lr"){
			return (n1.left+n1.width/2+n2.left+n2.width/2)/2;
		}else if(mType=="tb"){
			return (n1.top+n1.height/2+n2.top+n2.height/2)/2;
		}else if(mType=="olr"){
			return n2x=n2.left+n2.width/2;
		}else if(mType=="otb"){
			return n2y=n2.top+n2.height/2;
		}
	},
	//原lineData已经设定好的情况下，只在绘图工作区画一条线的页面元素
	addLineDom:function(id,lineData){
		var n1=this.$nodeData[lineData.from],n2=this.$nodeData[lineData.to];//获取开始/结束结点的数据
		if(!n1||!n2){
			return;
		}
		//开始计算线端点坐标
		var res;
		if(lineData.type&&lineData.type!="sl"){
			res=this.calcPolyPoints(n1,n2,lineData.type,lineData.M);
		}else {
			res=this.calcStartEnd(n1,n2);
		}
		if(!res){
			return;
		}
		if(lineData.type=="sl"){
			this.$lineDom[id]=this.drawLine(id,res.start,res.end,lineData.marked);
		}else{
			this.$lineDom[id]=this.drawPoly(id,res.start,res.m1,res.m2,res.end,lineData.marked);
		}
		this.$draw.appendChild(this.$lineDom[id]);
		if(FlowChart.prototype.useSVG==""){
			this.$lineDom[id].childNodes[1].innerHTML=lineData.name;
			if(lineData.type!="sl"){
				var Min=(res.start[0]>res.end[0]? res.end[0]:res.start[0]);
				if(Min>res.m2[0]){
					Min=res.m2[0];
				}
				if(Min>res.m1[0]){
					Min=res.m1[0];
				}
				this.$lineDom[id].childNodes[1].style.left = (res.m2[0]+res.m1[0])/2-Min-this.$lineDom[id].childNodes[1].offsetWidth/2+4;
				Min=(res.start[1]>res.end[1]? res.end[1]:res.start[1]);
				if(Min>res.m2[1]){
					Min=res.m2[1];
				}
				if(Min>res.m1[1]){
					Min=res.m1[1];
				}
				this.$lineDom[id].childNodes[1].style.top = (res.m2[1]+res.m1[1])/2-Min-this.$lineDom[id].childNodes[1].offsetHeight/2;
			}else{
				this.$lineDom[id].childNodes[1].style.left=((res.end[0]-res.start[0])*(res.end[0]>res.start[0]? 1:-1)-this.$lineDom[id].childNodes[1].offsetWidth)/2+4;
			}
		}else {
			this.$lineDom[id].childNodes[2].innerHTML=lineData.name;
		}
	},
	//增加一条线
	addLine:function(id,json){
		if(this.onItemAdd!=null&&!this.onItemAdd(id,"line",json))return;
		if(this.$undoStack&&this.$editable){
			this.pushOper("delLine",[id]);
		}
		if(json.from==json.to){
			return;
		}
		var n1=this.$nodeData[json.from],n2=this.$nodeData[json.to];//获取开始/结束结点的数据
		if(!n1||!n2){
			return;
		}
		//避免两个节点间不能有一条以上同向接连线
		for(var k in this.$lineData){
			if((json.from==this.$lineData[k].from&&json.to==this.$lineData[k].to)){
				return;
			}
		}
		//设置$lineData[id]
		this.$lineData[id]={};
		if(json.type){
			this.$lineData[id].type=json.type;
			this.$lineData[id].M=json.M;
		}else{
			this.$lineData[id].type="sl";//默认为直线
		}
		this.$lineData[id].from=json.from;
		this.$lineData[id].to=json.to;
		this.$lineData[id].name=json.name;
		if(json.marked){
			this.$lineData[id].marked=json.marked;
		}else {
			this.$lineData[id].marked=false;
		}
		//设置$lineData[id]完毕
		this.addLineDom(id,this.$lineData[id]);
		
		++this.$lineCount;
		if(this.$editable){
			this.$lineData[id].alt=true;
			if(this.$deletedItem[id]){
				delete this.$deletedItem[id];//在回退删除操作时,去掉该元素的删除记录
			}
		}
	},
	//重构所有连向某个结点的线的显示，传参结构为$nodeData数组的一个单元结构
	resetLines:function(id,node){
		for(var i in this.$lineData){
		  //获取结束/开始结点的数据
		  var other=null,res=null;
		  if(this.$lineData[i].from==id){//找结束点
			  other=this.$nodeData[this.$lineData[i].to]||null;
			  if(other==null){
				  continue;
			  }
			  if(this.$lineData[i].type=="sl"){
				  res=this.calcStartEnd(node,other);
			  }else{
				  this.$lineData[i].M=this.getMValue(node,other,this.$lineData[i].type);
				  res=this.calcPolyPoints(node,other,this.$lineData[i].type,this.$lineData[i].M);
			  }
			  if(!res){
				  break;
			  }
		  } else if(this.$lineData[i].to==id){//找开始点
			  other=this.$nodeData[this.$lineData[i].from]||null;
			  if(other==null){
				  continue;
			  }
			  if(this.$lineData[i].type=="sl"){
				  res=this.calcStartEnd(other,node);
			  }else {
				  this.$lineData[i].M=this.getMValue(other,node,this.$lineData[i].type);
				  res=this.calcPolyPoints(other,node,this.$lineData[i].type,this.$lineData[i].M);
			  }
			  if(!res){
				  break;
			  }
		  }
		  if(other==null){
			  continue;
		  }
		  this.$draw.removeChild(this.$lineDom[i]);
		  if(this.$lineData[i].type=="sl"){
		  	  this.$lineDom[i]=this.drawLine(i,res.start,res.end,this.$lineData[i].marked);
		  }else{
			  this.$lineDom[i]=this.drawPoly(i,res.start,res.m1,res.m2,res.end,this.$lineData[i].marked);
		  }
		  this.$draw.appendChild(this.$lineDom[i]);
		  if(FlowChart.prototype.useSVG==""){
			  this.$lineDom[i].childNodes[1].innerHTML=this.$lineData[i].name;
			  if(this.$lineData[i].type!="sl"){
				  var Min=(res.start[0]>res.end[0]? res.end[0]:res.start[0]);
				  if(Min>res.m2[0]){
					  Min=res.m2[0];
				  }
				  if(Min>res.m1[0]){
					  Min=res.m1[0];
				  }
				  this.$lineDom[i].childNodes[1].style.left = (res.m2[0]+res.m1[0])/2-Min-this.$lineDom[i].childNodes[1].offsetWidth/2+4;
				  Min=(res.start[1]>res.end[1]? res.end[1]:res.start[1]);
				  if(Min>res.m2[1]){
					  Min=res.m2[1];
				  }
				  if(Min>res.m1[1]){
					  Min=res.m1[1];
				  }
				  this.$lineDom[i].childNodes[1].style.top = (res.m2[1]+res.m1[1])/2-Min-this.$lineDom[i].childNodes[1].offsetHeight/2-4;
			  }else{
				  this.$lineDom[i].childNodes[1].style.left=((res.end[0]-res.start[0])*(res.end[0]>res.start[0]? 1:-1)-this.$lineDom[i].childNodes[1].offsetWidth)/2+4;
			  }
		   }else{
			   this.$lineDom[i].childNodes[2].innerHTML=this.$lineData[i].name;
		   }
		}
	},
	//重新设置连线的样式 newType= "sl":直线, "lr":中段可左右移动型折线, "tb":中段可上下移动型折线
	setLineType:function(id,newType,M){
		if(!newType||newType==null||newType==""||newType==this.$lineData[id].type){
			return false;
		}
		if(this.onLineSetType!=null&&!this.onLineSetType(id,newType)){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$lineData[id].type,this.$lineData[id].M];
			this.pushOper("setLineType",paras);
		}
		var from=this.$lineData[id].from;
		var to=this.$lineData[id].to;
		this.$lineData[id].type=newType;
		var res;
		//如果是变成折线
		if(newType!="sl"){
			var res=this.calcPolyPoints(this.$nodeData[from],this.$nodeData[to],this.$lineData[id].type,this.$lineData[id].M);
			if(M){
		  		this.setLineM(id,M,true);
			}else{
				this.setLineM(id,this.getMValue(this.$nodeData[from],this.$nodeData[to],newType),true);
			}
		}else{//如果是变回直线
			delete this.$lineData[id].M;
			if(this.$lineMove){
				this.$lineMove.hide().removeData("type").removeData("tid");
			}
		    res=this.calcStartEnd(this.$nodeData[from],this.$nodeData[to]);
		    if(!res){
				return;
			}
		    this.$draw.removeChild(this.$lineDom[id]);
		    this.$lineDom[id]=this.drawLine(id,res.start,res.end,this.$lineData[id].marked||this.$focus==id);
		    this.$draw.appendChild(this.$lineDom[id]);
		    if(FlowChart.prototype.useSVG==""){
			    this.$lineDom[id].childNodes[1].innerHTML=this.$lineData[id].name;
			    this.$lineDom[id].childNodes[1].style.left=((res.end[0]-res.start[0])*(res.end[0]>res.start[0]? 1:-1)-this.$lineDom[id].childNodes[1].offsetWidth)/2+4;
		    }else{
			    this.$lineDom[id].childNodes[2].innerHTML=this.$lineData[id].name;
		    }
		}
		if(this.$focus==id){
			this.focusItem(id);
		}
		if(this.$editable){
			this.$lineData[id].alt=true;
		}
	},
	//设置折线中段的X坐标值（可左右移动时）或Y坐标值（可上下移动时）
	setLineM:function(id,M,noStack){
		if(!this.$lineData[id]||M<0||!this.$lineData[id].type||this.$lineData[id].type=="sl"){
			return false;
		}
		if(this.onLineMove!=null&&!this.onLineMove(id,M)){
			return false;
		}
		if(this.$undoStack&&!noStack){
			var paras=[id,this.$lineData[id].M];
			this.pushOper("setLineM",paras);
		}
		var from=this.$lineData[id].from;
		var to=this.$lineData[id].to;
		this.$lineData[id].M=M;
		var ps=this.calcPolyPoints(this.$nodeData[from],this.$nodeData[to],this.$lineData[id].type,this.$lineData[id].M);
		this.$draw.removeChild(this.$lineDom[id]);
		this.$lineDom[id]=this.drawPoly(id,ps.start,ps.m1,ps.m2,ps.end,this.$lineData[id].marked||this.$focus==id);
		this.$draw.appendChild(this.$lineDom[id]);
		if(FlowChart.prototype.useSVG==""){
			this.$lineDom[id].childNodes[1].innerHTML=this.$lineData[id].name;
			var Min=(ps.start[0]>ps.end[0]? ps.end[0]:ps.start[0]);
			if(Min>ps.m2[0]){
				Min=ps.m2[0];
			}
			if(Min>ps.m1[0]){
				Min=ps.m1[0];
			}
			this.$lineDom[id].childNodes[1].style.left = (ps.m2[0]+ps.m1[0])/2-Min-this.$lineDom[id].childNodes[1].offsetWidth/2+4;
			Min=(ps.start[1]>ps.end[1]? ps.end[1]:ps.start[1]);
			if(Min>ps.m2[1]){
				Min=ps.m2[1];
			}
			if(Min>ps.m1[1]){
				Min=ps.m1[1];
			}
			this.$lineDom[id].childNodes[1].style.top = (ps.m2[1]+ps.m1[1])/2-Min-this.$lineDom[id].childNodes[1].offsetHeight/2-4;
		}else{
			this.$lineDom[id].childNodes[2].innerHTML=this.$lineData[id].name;
		}
		if(this.$editable){
			this.$lineData[id].alt=true;
		}
	},
	//删除转换线
	delLine:function(id){
		if(!this.$lineData[id]){
			return;
		}
		if(this.onItemDel!=null&&!this.onItemDel(id,"node")){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$lineData[id]];
			this.pushOper("addLine",paras);
		}
		
		this.$draw.removeChild(this.$lineDom[id]);
		delete this.$lineData[id];
		delete this.$lineDom[id];
		if(this.$focus==id)	this.$focus="";
		--this.$lineCount;
		if(this.$editable){
			//在回退新增操作时,如果节点ID以this.$id+"_line_"开头,则表示为本次编辑时新加入的节点,这些节点的删除不用加入到$deletedItem中
			if(id.indexOf(this.$id+"_line_")<0)
			this.$deletedItem[id]="line";
			this.$mpFrom.hide().removeData("p");
			this.$mpTo.hide().removeData("p");
		}
		if(this.$lineOper){
			this.$lineOper.hide().removeData("tid");
		}
	},
	//变更连线两个端点所连的结点
	//参数：要变更端点的连线ID，新的开始结点ID、新的结束结点ID；如果开始/结束结点ID是传入null或者""，则表示原端点不变
	moveLinePoints:function(lineId, newStart, newEnd, noStack){
		if(newStart==newEnd){
			return;
		}
		if(!lineId||!this.$lineData[lineId]){
			return;
		}
		if(newStart==null||newStart==""){
			newStart=this.$lineData[lineId].from;
		}
		if(newEnd==null||newEnd==""){
			newEnd=this.$lineData[lineId].to;
		}
		//避免两个节点间不能有一条以上同向接连线
		for(var k in this.$lineData){
			if((newStart==this.$lineData[k].from&&newEnd==this.$lineData[k].to)){
				return;
			}
		}
		if(this.onLinePointMove!=null&&!this.onLinePointMove(id,newStart,newEnd)){
			return;
		}
		if(this.$undoStack&&!noStack){
			var paras=[lineId,this.$lineData[lineId].from,this.$lineData[lineId].to];
			this.pushOper("moveLinePoints",paras);
		}
		if(newStart!=null&&newStart!=""){
			this.$lineData[lineId].from=newStart;
		}
		if(newEnd!=null&&newEnd!=""){
			this.$lineData[lineId].to=newEnd;
		}
		//重建转换线
		this.$draw.removeChild(this.$lineDom[lineId]);
		this.addLineDom(lineId,this.$lineData[lineId]);
		if(this.$editable){
			this.$lineData[lineId].alt=true;
		}
	},
	//用颜色标注/取消标注一个结点或转换线，常用于显示重点或流程的进度。
	//这是一个在编辑模式中无用,但是在纯浏览模式中非常有用的方法，实际运用中可用于跟踪流程的进度。
	markItem:function(id,type,mark){
		if(type=="node"){
			if(!this.$nodeData[id]){
				return;
			}
			if(this.onItemMark!=null&&!this.onItemMark(id,"node",mark)){
				return;
			}
			this.$nodeData[id].marked=mark||false;
			if(mark){
				this.$nodeDom[id].addClass("item_mark");
				jq.css("border-color",FlowChart.prototype.color.mark);
			}else{
				this.$nodeDom[id].removeClass("item_mark");
				if(id!=this.$focus) jq.css("border-color","transparent");
			}
		}else if(type=="line"){
			if(!this.$lineData[id]){
				return;
			}
			if(this.onItemMark!=null&&!this.onItemMark(id,"line",mark)){
				return;
			}
			this.$lineData[id].marked=mark||false;
			if(FlowChart.prototype.useSVG!=""){
				if(mark){
					this.$nodeDom[id].childNodes[1].setAttribute("stroke",FlowChart.prototype.color.mark||"#ff3300");
					this.$nodeDom[id].childNodes[1].setAttribute("marker-end","url(#arrow2)");
				}else{
					this.$nodeDom[id].childNodes[1].setAttribute("stroke",FlowChart.prototype.color.line||"#000000");
					this.$nodeDom[id].childNodes[1].setAttribute("marker-end","url(#arrow1)");
				}
			}else{
				if(mark){
					this.$nodeDom[id].strokeColor=FlowChart.prototype.color.mark||"#ff3300";
				}else{
					this.$nodeDom[id].strokeColor=FlowChart.prototype.color.line||"#000000";
				}
			}
		}
		if(this.$undoStatck){
			var paras=[id,type,!mark];
			this.pushOper("markItem",paras);
		}
	},
	/***以下为区域分组块操作***/
	moveArea:function(id,left,top){
		if(!this.$areaData[id]){
			return;
		}
		if(this.onItemMove!=null&&!this.onItemMove(id,"area",left,top)){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$areaData[id].left,this.$areaData[id].top];
			this.pushOper("moveNode",paras);
		}
		if(left<0){
			left=0;
		}
		if(top<0){
			top=0;
		}
		$("#"+id).css({left:left+"px",top:top+"px"});
		this.$areaData[id].left=left;
		this.$areaData[id].top=top;
		if(this.$editable){
			this.$areaData[id].alt=true;
		}
	},
	//删除区域分组
	delArea:function(id){
		if(!this.$areaData[id]){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$areaData[id]];
			this.pushOper("addArea",paras);
		}
		if(this.onItemDel!=null&&!this.onItemDel(id,"node")){
			return;
		}
		delete this.$areaData[id];
		this.$areaDom[id].remove();
		delete this.$areaDom[id];
		--this.$areaCount;
		if(this.$editable){
			//在回退新增操作时,如果节点ID以this.$id+"_area_"开头,则表示为本次编辑时新加入的节点,这些节点的删除不用加入到$deletedItem中
			if(id.indexOf(this.$id+"_area_")<0){
				this.$deletedItem[id]="area";
			}
		}
	},
	//设置区域分组的颜色
	setAreaColor:function(id,color){
		if(!this.$areaData[id]){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$areaData[id].color];
			this.pushOper("setAreaColor",paras);
		}
		if(color=="red"||color=="yellow"||color=="blue"||color=="green"){
			this.$areaDom[id].removeClass("area_"+this.$areaData[id].color).addClass("area_"+color);
			this.$areaData[id].color=color;
		}
		if(this.$editable){
			this.$areaData[id].alt=true;
		}
	},
	//设置区域分块的尺寸
	resizeArea:function(id,width,height){
		if(!this.$areaData[id]){
			return;
		}
		if(this.onItemResize!=null&&!this.onItemResize(id,"area",width,height)){
			return;
		}
		if(this.$undoStack){
			var paras=[id,this.$areaData[id].width,this.$areaData[id].height];
			this.pushOper("resizeArea",paras);
		}
		this.$areaDom[id].children(".bg").css({width:width-2+"px",height:height-2+"px"});
		width=this.$areaDom[id].outerWidth();
		height=this.$areaDom[id].outerHeight();
		this.$areaDom[id].children("bg").css({width:width-2+"px",height:height-2+"px"});
		this.$areaData[id].width=width;
		this.$areaData[id].height=height;
		if(this.$editable){
			this.$areaData[id].alt=true;
		}
	},
	addArea:function(id,json){
		if(this.onItemAdd!=null&&!this.onItemAdd(id,"area",json)){
			return;
		}
		if(this.$undoStack&&this.$editable){
			this.pushOper("delArea",[id]);
		}
		var html=["<div id='",id,"' class='FlowChart_area area_",json.color,"' style='top:",json.top,"px;left:",json.left,"px'>"];
		html.push("<div class='bg' style='width:",(json.width-2),"px;height:",(json.height-2),"px'></div>");
		html.push("<label>");
		html.push(json.name);
		html.push("</label><i></i>");
		html.push("<div>");
		html.push("<div class='rs_bottom'></div>");
		html.push("<div class='rs_right'></div>");
		html.push("<div class='rs_rb'></div>");
		html.push("<div class='rs_close'></div>");
		html.push("</div></div>");
		this.$areaDom[id]=$(html.join(''));
		this.$areaData[id]=json;
		this.$group.append(this.$areaDom[id]);
		if(this.$nowType!="group"){
			this.$areaDom[id].children("div:eq(1)").css("display","none");
		}
		++this.$areaCount;
		if(this.$editable){
			this.$areaData[id].alt=true;
			if(this.$deletedItem[id]){
				delete this.$deletedItem[id];//在回退删除操作时,去掉该元素的删除记录
			}
		}
	},
	//工作区域大小调整
	sizeAdjustment:function(w,h){
		return {width:w,height:h};
	},
	//重构流程图工作区大小
	reInitworkAreaSize:function(w,h){
		if(!w){
			w=this.$bgDiv.width();
			h=this.$bgDiv.height();
		}
		var _size=this.sizeAdjustment(w,h);
		w=_size.width,h=_size.height;
		this.$workArea.css({height:h*3+"px",width:w*3+"px"});
		if(FlowChart.prototype.useSVG==""){
			this.$draw.coordsize = w*3+","+h*3;
		}
		this.$draw.style.width = w*3 + "px";
		this.$draw.style.height = +h*3 + "px";
		if(this.$group==null){
			this.$group.css({height:h*3+"px",width:w*3+"px"});
		}
		if(this.onReInitSize!=null){
			this.onReInitSize(w*3,h*3);
		}
	},
	//重构整个流程图设计器的宽高
	reInitSize:function(width,height){
		var w=(width||800)-2;
		var h=(height||500)-2;
		this.$bgDiv.css({height:h+"px",width:w+"px"});
		var headHeight=0,hack=10;
		if(this.$head!=null){
			headHeight=24;
			hack=7;
		}
		if(this.$tool!=null){
			this.$tool.css({height:h-headHeight-hack+"px"});
			w-=39;
		}else{
			w-=3;
		}
		h=h-headHeight-(this.$head!=null? 5:8);
		this.$workArea.parent().css({height:h+"px",width:w+"px"});
		this.reInitworkAreaSize(w,h);
	}
}
FlowChart.prototype.color={};
//将此类的构造函数加入至JQUERY对象中
jQuery.extend({
	createFlowChart:function(bgDiv,property){
		return new FlowChart(bgDiv,property);
	}
}); 