package com.drawingapp.tools
{
	import flash.display.Sprite;
	import flash.display.DisplayObjectContainer;

	public class Tool extends Sprite
	{
		protected var enabled:Boolean;
		public function get isEnabled():Boolean { return enabled; }
		
		public function get selected():Boolean { return alpha == .5; }
		public function set selected( selected:Boolean ):void
		{
			alpha = selected ? .5 : 1; 
			buttonMode = !selected;
		}

		public function Tool()
		{
			selected = false;
		}
		
		public function enable( canvas:DisplayObjectContainer ):void
		{
			throw new Error( "Method is abstract and needs to be overridden." );
		}
		
		public function disable():void
		{
			throw new Error( "Method is abstract and needs to be overridden." );
		}
		
		
	}
}