tkinter keypress events are a mess for numpad keys
Terry Reedy
tjreedy at udel.edu
Tue Aug 29 00:32:24 EDT 2017
On 8/28/2017 7:20 PM, Irmen de Jong wrote:
> Hi,
>
> Using tkinter in python3, I was trying to intercept individual keypresses (and releases)
> of keys on the numeric keypad. I want to use this as a simple joystick simulation.
> While you can bind the <KeyPress> event, actually doing something sensible with it in a
> cross platform way seems utterly impossible.
>
> The distinguishing attribute of the event object is different depending on what OS
> you're using (keysym, keycode, keysym_num) and on Windows registering some keys doesn't
> even seem to work (or they're confused with the same keys on the normal keyboard area).
> The keysym names/values in the documentation are not correct either
> (I'm mainly looking at http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/key-names.html)
*The* documentation (for 8.6) is the tcl.tk/man doc set:
https://www.tcl.tk/man/tcl8.6/TkCmd/contents.htm
For the level of detail you are looking at, they are essential.
The nmt docs for 8.5 are neither complete (intentionally not) nor always
correct nor always up to date. The tk docs may also have errors, just
as our do, but I presume one can file a report somewhere and possibly
get a fix.
> My original question with the details on stackoverflow:
> https://stackoverflow.com/questions/45869902/better-way-to-deal-with-tks-keyboard-events-mess-for-numpad-keys-in-pythontkin
>
> Unfortunately there hasn't been a useful response or answer.
>
> A gist with a small example program is here:
> https://gist.github.com/irmen/2c9d6bb0afb16b464805410c108a2885
>
> Does anyone here have a clue perhaps?
> Or have any idea why this is so messy?
--
Terry Jan Reedy
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