~extremepopcorn/dhlib/dhlib_ep

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package fortress;

/**
 * Temporarily shows the HP for an object.
 */
class HPLiveObject extends LiveObject
{
	var trackLO : LiveObject;
	var timeout : Float;
	
	public function new( gd :GameDriver,  lo : LiveObject )
	{
		super( gd );
		actMode = LiveObject.actInvisible;
		timeout = 2;
			
		trackLO = lo;
		at = lo.at; //just use
		
		draw();
	}
	
	override private function draw( )
	{
		graphics.clear();
				
		//assume objects are centered
		graphics.beginFill( 0x808080 );
		graphics.drawRect( 
			-GConst.gridSizeX/2, 
			GConst.gridSizeY * trackLO.size.y / 2, 
			GConst.gridSizeX, 
			GConst.gridSizeY/4 
			);
		graphics.endFill( );
		
		graphics.beginFill( 0x800000 );
		graphics.drawRect( 
			-GConst.gridSizeX/2, 
			GConst.gridSizeY * trackLO.size.y / 2, 
			GConst.gridSizeX / trackLO.maxHP * trackLO.hp, 
			GConst.gridSizeY/4 
			);
		graphics.endFill();
	}
	
	override public function step( elapsed :Float ) : StepResult 
	{
		timeout -= elapsed;
		if( timeout <= 0 || trackLO.hp <= 0 )	//also if the tracked object has no more HPs
			return StepResult.Remove;
			
		at = trackLO.at;	//no copy
		return StepResult.Changed;					
	}	
}