Retrieving event descriptors in Tkinter

[Fredrik Lundh]

Avi Kak wrote:

> Does Tkinter provide a function that returns all the event descriptors
> for a given widget class?  I am looking for something similar to what
> you get in Perl/Tk when you call bind() with a single explicit
> argument. For example, in Perl/Tk,
>
>     $widget->bind( Tk::Button )
>
> returns a list like
>
>   <Key-Return>
>   <Key-space>
>   <ButtonRelease-1>
>   ....
>
> Is it possible to do the same in Tkinter?  I have looked through
> Fredrik Lundh's on-line reference and also the one by John Shipman. I
> am unable to locate the function I need. Perhaps I have not looked hard
> enough.  Any help would be much appreciated.

Tkinter matches Tk quite closely, and there's no way to get *all* bindings
for a standard widget with a single call at the Tk level (afaik).

to extract the same information from a Tkinter widget, you should first call
bindtags() on the widget to get a list of binding classes used for this widget,
and you can then use bind_class(cls) to get the events for that class.

to get all events, you can use something like:

>>> bindings = set()
>>> for cls in b.bindtags():
...     bindings |= set(b.bind_class(cls))
...
>>> bindings
set(['<Alt-KeyRelease>', '<Leave>', '<Enter>', '<KeyRelease-Alt_L>',
'<Key-Alt_R>', '<<PrevWindow>>', '<Key-F10>', '<KeyRelease-F10>',
'<Key-space>', '<Alt-Key>', '<Button-1>', '<ButtonRelease-1>',
'<KeyRelease-Alt_R>', '<Key-Tab>', '<Key-Alt_L>'])

</F>