1 from GUIComponent import *
7 def createGUIScreen(self, parent):
8 for (name, val) in self.items():
9 if isinstance(val, GUIComponent):
10 val.GUIcreate(parent, None)
12 def deleteGUIScreen(self):
13 for (name, val) in self.items():
14 if isinstance(val, GUIComponent):
21 # DIESER KOMMENTAR IST NUTZLOS UND MITTLERWEILE VERALTET! (glaub ich)
23 # note: you'll probably run into this assert. if this happens, don't panic!
24 # yes, it's evil. I told you that programming in python is just fun, and
25 # suddently, you have to care about things you don't even know.
27 # but calm down, the solution is easy, at least on paper:
29 # Each Component, which is a GUIComponent, owns references to each
30 # instantiated eWidget (namely in screen.data[name]["instance"], in case
32 # on deleteGUIscreen, all eWidget *must* (!) be deleted (otherwise,
33 # well, problems appear. I don't want to go into details too much,
34 # but this would be a memory leak anyway.)
35 # The assert beyond checks for that. It asserts that the corresponding
36 # eWidget is about to be removed (i.e., that the refcount becomes 0 after
37 # running deleteGUIscreen).
38 # (You might wonder why the refcount is checked for 2 and not for 1 or 0 -
39 # one reference is still hold by the local variable 'w', another one is
40 # hold be the function argument to sys.getrefcount itself. So only if it's
41 # 2 at this point, the object will be destroyed after leaving deleteGUIscreen.)
43 # Now, how to fix this problem? You're holding a reference somewhere. (References
44 # can only be hold from Python, as eWidget itself isn't related to the c++
45 # way of having refcounted objects. So it must be in python.)
47 # It could be possible that you're calling deleteGUIscreen trough a call of
48 # a PSignal. For example, you could try to call screen.doClose() in response
49 # to a Button::click. This will fail. (It wouldn't work anyway, as you would
50 # remove a dialog while running it. It never worked - enigma1 just set a
51 # per-mainloop variable on eWidget::close() to leave the exec()...)
52 # That's why Session supports delayed closes. Just call Session.close() and
55 # Another reason is that you just stored the data["instance"] somewhere. or
56 # added it into a notifier list and didn't removed it.
58 # If you can't help yourself, just ask me. I'll be glad to help you out.
59 # Sorry for not keeping this code foolproof. I really wanted to archive
60 # that, but here I failed miserably. All I could do was to add this assert.
61 # assert sys.getrefcount(w) == 2, "too many refs hold to " + str(w)
64 self.deleteGUIScreen()