# we should not disconnect from upstream if
# there are still elements depending on us.
assert len(self.downstream_elements) == 0, "there are still downstream elements left"
-
+
# Sources don't have a source themselves. don't do anything here.
if self.source is not None:
self.source.disconnectDownstream(self)
-
+ # sources are owned by the Screen, so don't destroy them here.
+ self.destroy()
+
def disconnectDownstream(self, downstream):
self.downstream_elements.remove(downstream)
if self.master == downstream:
def doSuspend(self, suspend):
pass
+
+ def destroy(self):
+ pass