public void BeginListening(ThingIsReleveantFilter callback, Texture2D dragHighlightTex)
 {
     listening          = true;
     filterCallback     = callback;
     dragHighlightMat   = MaterialPool.MatFrom(dragHighlightTex, ShaderDatabase.MetaOverlay, Color.white);
     invokingDesignator = Find.MapUI.designatorManager.SelectedDesignator;
 }
		public void BeginListening(ThingIsReleveantFilter callback, Texture2D dragHighlightTex) {
			listening = true;
			filterCallback = callback;
			dragHighlightMat = MaterialPool.MatFrom(dragHighlightTex, ShaderDatabase.MetaOverlay, Color.white);
			invokingDesignator = DesignatorManager.SelectedDesignator;
		}