def __init__(self, tile, xoffset=0.0, yoffset=0.0, level=0):
QGraphicsObject.__init__(self)
if not isinstance(tile, Tile):
tile = Tile(tile)
self._tile = tile
self._boundingRect = None
self._cross = False
self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
# while moving the tile we use ItemCoordinateCache, see
# Tile.setActiveAnimation
self.__board = None
self.setClippingFlags()
self.__xoffset = xoffset
self.__yoffset = yoffset
self.__dark = False
self.level = level
self.activeAnimation = dict() # key is the property name
self.queuedAnimations = []
