package net.srirangan.visualization
{

	import mx.charts.series.items.LineSeriesSegment;
	import mx.core.IDataRenderer;
	import mx.graphics.IStroke;
	import mx.skins.ProgrammaticSkin;
	
	import mx.controls.Alert;
	
	import net.srirangan.utils.GraphicsUtils;
	
	public class DashedLineRenderer extends ProgrammaticSkin implements IDataRenderer
	{
		public function DashedLineRenderer() 
		{
			super();
		}
		
		private var _lineSegment:LineSeriesSegment;
		private var _pattern:Array = [12];
		
		public function set pattern(value:Array):void
		{
			_pattern = value;
			invalidateDisplayList();
		}
		public function get pattern():Array { return _pattern; }
		
		public function get data():Object
		{
			return _lineSegment;
		}
	
		public function set data(value:Object):void
		{
			_lineSegment = LineSeriesSegment(value);
			invalidateDisplayList();
		}
	
		override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
		{
			super.updateDisplayList(unscaledWidth, unscaledHeight);
	
			var stroke:IStroke = getStyle("lineStroke");
	
			graphics.clear();
			GraphicsUtils.drawDashedPolyLine(graphics,stroke,_pattern,_lineSegment.items.slice(_lineSegment.start,_lineSegment.end+1));
		}
	}

}