def strokable(self, val):
self._strokable = val
if val:
MathApp._addStrokable(self)
else:
MathApp._removeStrokable(self)
def destroy(self):
MathApp._removeVisual(self)
MathApp._removeMovable(self)
MathApp._removeStrokable(self)
_MathDynamic.destroy(self)
Sprite.destroy(self)