This class is the controller for LineElement
Inheritance: IController
 IController IControllable.GetController()
 {
     if (controller == null)
     {
         controller = new LineController(this);
     }
     return(controller);
 }
		IController IControllable.GetController()
		{
			if (controller == null)
				controller = new LineController(line1);
			return controller;
		}