public DrawingEngine(Settings settings, IMouseHandler mouseHandler, PenPreview penPreview, IStorage storage)
{
_settings = settings;
_mouseHandler = mouseHandler;
_penPreview = penPreview;
_storage = storage;
NewBitmaps();
MainGraphics.Clear(Color.White);
Canvas = (Bitmap)MainImage.Clone();
_selectedFigureIndex = -1;
}