package com.falkensweb.flex.view{
	import mx.controls.DataGrid;
	import flash.events.MouseEvent;
	 import flash.display.Sprite;
	 import mx.controls.listClasses.IListItemRenderer;
	 import mx.controls.dataGridClasses.DataGridItemRenderer;
	 import flash.geom.Point;

	public class SelectableCellDataGrid extends DataGrid{
	    
	    private var lastOver:DataGridItemRenderer=null;
	    private var selectedCell:DataGridItemRenderer=null
	    
	    public function get selectedCellData():Object{
	    	if (selectedCell != null){
	   	 		return selectedCell.data;	
	   	 	}	
	   	 	return new Object();
	    }
	
		public function SelectableCellDataGrid(){
	        super();
	     	  this.addEventListener(MouseEvent.MOUSE_OUT,doOut);
	      }
	    
	    override protected function drawHighlightIndicator(indicator:Sprite, x:Number, y:Number, 
	    						width:Number, height:Number, 
	    						color:uint, itemRenderer:IListItemRenderer):void{		//what are we over, and where is it ?
        	var r:Object=findRowColFor(stage.mouseX,stage.mouseY,getStyle("rollOverColor"));  
        	if (selectedCell!=null ){
           		selectedCell.background=true;
           		selectedCell.backgroundColor=getStyle("selectionColor");
           		trace('old selected restated in hover');
           	}      		
        		
        }
	    
	   override protected function selectItem(item:IListItemRenderer,
                                                                  shiftKey:Boolean, ctrlKey:Boolean,
                                                                  transition:Boolean = true):Boolean{
        	var r:Boolean=super.selectItem(item,shiftKey,ctrlKey,transition);  
        	var rr:Object=findRowColFor(stage.mouseX,stage.mouseY,getStyle("selectionColor"));
        	if (rr.x>-1){
        		if (selectedCell != null){//clear existing
        			selectedCell.background=false;
        		}
               	selectedCell=rr.rend;
               	selectedCell.background=true;
            	selectedCell.backgroundColor=getStyle("selectionColor");
           	}
        	return r;
	}
	    
	    override protected function drawSelectionIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void{
		var r:Object=findRowColFor(stage.mouseX,stage.mouseY,getStyle("rollOverColor"));     
           	if (selectedCell!=null && r.rend==selectedCell){
           		selectedCell.background=true;
           		selectedCell.backgroundColor=getStyle("selectionColor");
           	}
           	
        }
	    
	    /**
	     * Locate the ItemRenderer in this datagrid that is under this point
	     */
	    private function findRowColFor(x:Number,y:Number,color:uint):Object{	    	
	    	var point1:Point = new Point(x,y);
	    	var point2:Point = globalToLocal(point1);
	    	x=point2.x;
	    	y=point2.y;
	    	
	    	var i:Number=0;
	    	var j:Number=0;
	    	
	    	var calcX:Number=0;
	    	var calcY:Number=0;
	    	var r:Object=new Object;
	    	r.x=-1;//not found flag
	    	for (i=0;i<this.listItems.length;i++){
	    		var a:Array=this.listItems[i];
    			if (a.length>0){
	    			for (j=0;j<a.length;j++){					
		    		var rend:DataGridItemRenderer = a[j];
		    			//if in renderer box, and not first column
		    			if ( x > calcX && x<=calcX+rend.width &&
							 y > calcY && y<=calcY+rend.height+3 
		    			){
		    				var last:Object=lastOver;
		    				if (last!=null && last!=selectedCell){last.background=false;}
		    				
		    				r.width=rend.width;
		    				r.height=22;//rend.height;
		    				r.x=calcX;
		    				r.y=calcY;
		    				r.rend=rend;
		    				rend.background=true;
		    				rend.backgroundColor=color;
		    				
		    				lastOver=rend;
		    				return r;
		    			}
	    				calcX=calcX+rend.width;
		    		}	
    				
    			}
    			calcY=calcY+24;//+i[0].height
	    		calcX=0;
	    	}
	    	return r;
	    }
	    
	    public function doOut(e:*):void{
		   if (lastOver!=null && lastOver !=selectedCell){lastOver.background=false;}	    	
		}
			
	}
	
}