/*
Product Name: dhtmlxSuite 
Version: 4.0.3 
Edition: Professional 
License: content of this file is covered by DHTMLX Commercial or Enterprise license. Usage without proper license is prohibited. To obtain it contact sales@dhtmlx.com
Copyright UAB Dinamenta http://www.dhtmlx.com
*/

dhtmlXGridObject.prototype._updateLine=function(z,row){ 
	row=row||this.rowsAr[z.id];
	if (!row) return;
	var im=row.imgTag;
	if (!im) return;
	if (z.state=="blank") return im.src=this.iconTree+"blank.gif";
	
		var n=1;
		if (z.index==0){
			if (z.level==0){
				if ((z.parent.childs.length-1)>z.index)
					n=3;
				else n=1;
			}
			else
			{
				if ((z.parent.childs.length-1)>z.index)
					n=3;
				else
					n=2;
			}
		}
		else
			if ((z.parent.childs.length-1)>z.index)
				n=3;
			else
				n=2;
			
		
		im.src=this.iconTree+z.state+n+".gif";
}
dhtmlXGridObject.prototype._updateParentLine=function(z,row){
		row=row||this.rowsAr[z.id];
		if (!row) return;
		var im=row.imgTag;
		if (!im) return;
		for (var i=z.level; i>0; i--){
			if (z.id==0) break;
			im=im.previousSibling;
			z=z.parent;
			if ((z.parent.childs.length-1)>z.index)
				im.src=this.iconTree+"line1.gif";
			else
				im.src=this.iconTree+"blank.gif";
		}
}

dhtmlXGridObject.prototype._renderSortA=dhtmlXGridObject.prototype._renderSort;
dhtmlXGridObject.prototype._renderSort=function(){
	this._renderSortA.apply(this,arguments);
	this._redrawLines(0)	
} 
dhtmlXGridObject.prototype._redrawLines=function(id){
		if (this._tgle)
			this._h2.forEachChild((id||0),function(z){
					this._updateLine(z);
					this._updateParentLine(z);
			},this);
	}
/**
*   @desc: enable lines in treeGrid 
*   @type: public
*   @edition: Professional
*   @topic: 0
*/
dhtmlXGridObject.prototype.enableTreeGridLines=function(){
	dhtmlXGridObject._emptyLineImg="line";
	
	this._updateTGRState=function(z,force){ 
		if (force || !z.update || z.id==0) return;
		if (this._tgle)
			this._updateLine(z,this.rowsAr[z.id]);
		z.update=false;
	}

	this._tgle=true;
	this.attachEvent("onXLE",function(a,b,id){
		this._redrawLines(id)
	});    
	
	this.attachEvent("onOpenEnd",function(id){
		this._redrawLines(id)
	});    
	
	
	this.attachEvent("onRowAdded",function(id){ 
		var z=this._h2.get[id];
		this._updateLine(z); 
		this._updateParentLine(z);
		if (z.index<(z.parent.childs.length-1)){
			z=z.parent.childs[z.index+1];
			this._updateLine(z);
			this._updateParentLine(z);
		}
		else if (z.index!=0){
			z=z.parent.childs[z.index-1];
			this._updateLine(z);
			this._updateParentLine(z);
			if (z.childs.length)
				this._h2.forEachChild(z.id,function(c_el){
					this._updateParentLine(c_el)
				},this)
		}
	});
	this.attachEvent("onOpen",function(id,state){ 
		if (state){ 
			var z=this._h2.get[id];
			for (var i=0; i < z.childs.length; i++) 
				this._updateParentLine(z.childs[i]);
		}
		return true;
	});
	this.attachEvent("onBeforeRowDeleted",function(id){
		var self=this;
		var z=this._h2.get[id];
		var w=null;
		if (z.index!=0)
			w=z.parent.childs[z.index-1];
		z=z.parent;
			
		window.setTimeout(function(){
			z  = self._h2.get[z.id];
			if (!z) return;
						
			self._updateLine(z);
			self._updateParentLine(z);
			
			if (w){
				self._updateLine(w);
				if (w.state=="minus")
				self._h2.forEachChild(w.id,function(z){
					self._updateParentLine(z);
				},self);
			}
		},1);
		return true;
	});
} 

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