Retrieving event descriptors in Tkinter

[Avi Kak]

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>
<ButtonReleas e-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.

Thanks.

Avi Kak
kak@purdue.edu

[Fredrik Lundh]

Re: Retrieving event descriptors in Tkinter

Avi Kak wrote:
[color=blue]
> 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>
> <ButtonReleas e-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.[/color]

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:
[color=blue][color=green][color=darkred]
>>> bindings = set()
>>> for cls in b.bindtags():[/color][/color][/color]
.... bindings |= set(b.bind_clas s(cls))
....[color=blue][color=green][color=darkred]
>>> bindings[/color][/color][/color]
set(['<Alt-KeyRelease>', '<Leave>', '<Enter>', '<KeyRelease-Alt_L>',
'<Key-Alt_R>', '<<PrevWindow>> ', '<Key-F10>', '<KeyRelease-F10>',
'<Key-space>', '<Alt-Key>', '<Button-1>', '<ButtonReleas e-1>',
'<KeyRelease-Alt_R>', '<Key-Tab>', '<Key-Alt_L>'])

</F>

[Avi Kak]

Re: Retrieving event descriptors in Tkinter

Thanks very much. That's exactly what I was looking for. --- Avi