def _draw(self):
"""Draw the scroll.
1. Draw the background and the sprites on the drawable image. That's
what Window._draw() does.
2. Draw a part of the drawable image on the visible one.
"""
WindowSprite._draw(self)
self._drawVisiblePart()
def __init__(self):
"""Initialize a new ScrollSprite."""
WindowSprite.__init__(self)
self.big_image = None
self.big_rect = pygame.Rect(0, 0, 0, 0)
self.visible_rect = pygame.Rect(0, 0, 0, 0)