diff options
Diffstat (limited to 'Lib/idlelib/MultiCall.py')
| -rw-r--r-- | Lib/idlelib/MultiCall.py | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/Lib/idlelib/MultiCall.py b/Lib/idlelib/MultiCall.py index 64729eab8c..25105dc93e 100644 --- a/Lib/idlelib/MultiCall.py +++ b/Lib/idlelib/MultiCall.py @@ -57,6 +57,13 @@ _modifier_names = dict([(name, number) for number in range(len(_modifiers)) for name in _modifiers[number]]) +# In 3.4, if no shell window is ever open, the underlying Tk widget is +# destroyed before .__del__ methods here are called. The following +# is used to selectively ignore shutdown exceptions to avoid +# 'Exception ignored' messages. See http://bugs.python.org/issue20167 +APPLICATION_GONE = '''\ +can't invoke "bind" command: application has been destroyed''' + # A binder is a class which binds functions to one type of event. It has two # methods: bind and unbind, which get a function and a parsed sequence, as # returned by _parse_sequence(). There are two types of binders: @@ -98,7 +105,14 @@ class _SimpleBinder: def __del__(self): if self.handlerid: - self.widget.unbind(self.widgetinst, self.sequence, self.handlerid) + try: + self.widget.unbind(self.widgetinst, self.sequence, + self.handlerid) + except tkinter.TclError as e: + if e.args[0] == APPLICATION_GONE: + pass + else: + raise # An int in range(1 << len(_modifiers)) represents a combination of modifiers # (if the least significent bit is on, _modifiers[0] is on, and so on). @@ -227,7 +241,13 @@ class _ComplexBinder: def __del__(self): for seq, id in self.handlerids: - self.widget.unbind(self.widgetinst, seq, id) + try: + self.widget.unbind(self.widgetinst, seq, id) + except tkinter.TclError as e: + if e.args[0] == APPLICATION_GONE: + break + else: + raise # define the list of event types to be handled by MultiEvent. the order is # compatible with the definition of event type constants. @@ -390,8 +410,13 @@ def MultiCallCreator(widget): func, triplets = self.__eventinfo[virtual] if func: for triplet in triplets: - self.__binders[triplet[1]].unbind(triplet, func) - + try: + self.__binders[triplet[1]].unbind(triplet, func) + except tkinter.TclError as e: + if e.args[0] == APPLICATION_GONE: + break + else: + raise _multicall_dict[widget] = MultiCall return MultiCall |