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Re: [Matplotlib-users] Re: capturing arrow key events
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From: John G. <jn...@eu...> - 2005-04-14 09:59:09
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For gtk you can use something like this:
keyvald = {}
for name in ['Up', 'Down', 'Left', 'Right']:
keyvald[name.lower()] = gtk.gdk.keyval_from_name(name)
John
Tim Leslie wrote:
> On Wed, 13 Apr 2005, Werner F. Bruhin <wer...@fr...> wrote...
>
> > Hi Tim and John,
> >
> > I didn't catch on to this earlier but shouldn't the backend_wx.py use
> > something along these lines:
> >
> > keyvald = {wx.WXK_CONTROL : 'control',
> > wx.WXK_SHIFT : 'shift',
> > wx.WXK_ALT : 'alt',
> > wx.WXK_LEFT : 'left',
> > wx.WXK_UP : 'up',
> > wx.WXK_RIGHT : 'right',
> > wx.WXK_DOWN : 'down',
> > }
> >
> > For more WXK codes see the wx demo Process and Events/KeyEvents.
>
> I suppose that would be the sane thing to do, yes. Presumably we can also
> find similar codes for GTK. I'll have a look for them today.
>
> Tim
>
> >
> > See you
> > Werner
> >
> >
> > Tim Leslie wrote:
> > >OK, here are the diffs for each backend:
> > >
> > >~/src/matplotlib-0.80/lib/matplotlib/backends/backend_gtk.py
> > >109,112d108
> > >< 65361 : 'left',
> > >< 65362 : 'up',
> > >< 65363 : 'right',
> > >< 65364 : 'down',
> > >
> > >~/src/matplotlib-0.80/lib/matplotlib/backends/backend_wx.py
> > >675,678d674
> > >< 316 : 'left',
> > >< 317 : 'up',
> > >< 318 : 'right',
> > >< 319 : 'down',
> > >
> > >~/src/matplotlib-0.80/lib/matplotlib/backends/backend_tkagg.py
> > >99,102d98
> > >< 65361 : 'left',
> > >< 65362 : 'up',
> > >< 65363 : 'right',
> > >< 65364 : 'down',
> > >
> > >~/src/matplotlib-0.80/lib/matplotlib/backends/backend_qt.py
> > >74,77d73
> > >< qt.Qt.Key_Left : 'left',
> > >< qt.Qt.Key_Up : 'up',
> > >< qt.Qt.Key_Right : 'right',
> > >< qt.Qt.Key_Down : 'down',
> > >
> > >As you can see, it's reasonably straightforward to add these extra
> keys,
> > >so if anyone feels creative and wants other keys added, this should
> give
> > >an idea of what needs changing.
> > >
> > >As for my problem with gtk and the down key, I've rebuilt pygtk
> (2.6.1),
> > >installed matplotlib 0.80, and the problem is still there. I
> whipped up a
> > >trivial pygtk program which was a window which connected to key press
> > >events and it worked just fine, so it seems that there's something
> that
> > >matplotlib is doing which triggers the bug (that's not to say the
> bug is
> > >in mpl of course). I'm guessing there is something in my system setup
> > >which is flakey and causing it to happen, but it's 3am and I'm
> tired so
> > >I'll just live with it for now :)
> > >
> > >Cheers,
> > >
> > >Tim Leslie
> > >
> > >On Thu, 14 Apr 2005, Tim Leslie <ti...@cs...> wrote...
> > >
> > >
> > >>Just to follow up on this, I made the required changes to the other
> > >>backends and they worked fine. GTK and GTKAgg had the same broken
> > >>behaviour while TkAgg, WX and WXAgg worked fine (don't have qt
> installed).
> > >>
> > >>I'll bring all my libraries up to date (thanks for 0.80 tonight)
> and dive
> > >>into the pygtk stuff a bit deeper to see if I can find out what's
> > >>breaking.
> > >>
> > >>Having looked through a bit more mpl code I'd just like to say
> that I'm
> > >>very impressed with how simple it is to read. After working out
> what to
> > >>change in GTK, it followed an identical pattern in the other backends
> > >>which was very nice to see.
> > >>
> > >>Cheers,
> > >>
> > >>Tim Leslie
> > >>
> > >>On Thu, 14 Apr 2005, Tim Leslie <ti...@cs...> wrote...
> > >>
> > >>
> > >>>On Wed, 13 Apr 2005, John Hunter <jdh...@ac...>
> wrote...
> > >>>
> > >>>
> > >>>>>>>>>"Tim" == Tim Leslie <ti...@cs...> writes:
> > >>>>
> > >>>> Tim> This all works fine except that the down key doesn't
> register
> > >>>> Tim> as released. After registering the down key press, no
> other
> > >>>> Tim> key events register until you hit the up key, at which
> point
> > >>>> Tim> the key release triggers for the up.
> > >>>>
> > >>>>It works fine for me -- what is your pygtk version and OS?
> > >>>>I'm using pygtk 2.2.0 on linux.
> > >>>
> > >>>AFAICT pygtk 2.0, this is running on ubuntu unstable.
> > >>>
> > >>>
> > >>>>You might put some debug print statements to print event.keyval in
> > >>>>_get_key to see if an event is being triggered at the gtk level.
> > >>>
> > >>>OK, I'll have a play with that.
> > >>>
> > >>>
> > >>>>Could it be a bad keyboard???
> > >>>
> > >>>Yep :) Well, maybe. The down key works in every other app I use,
> but I've
> > >>>had problems with this keyboard in strange ways before, so I
> wouldn't put
> > >>>it past it. I'll try it out on another machine when I get a
> chance and
> > >>>see
> > >>>how it goes. It's a laptop, so I can't really change the
> keyboard. (hmm,
> > >>>maybe a usb external one, if I had one)
> > >>>
> > >>>
> > >>>> Tim> I really don't know a lot about Gtk or the matplotlib
> > >>>> Tim> internals so I couldn't trace this bug deeper into the
> > >>>> Tim> libraries. Can anyone shed some light on what's going
> on? If
> > >>>> Tim> we can get the arrow keys working is there a chance of
> > >>>> Tim> getting them into the standard distribution (assuming we
> had
> > >>>> Tim> all backends working)?
> > >>>>
> > >>>>Absolutely. It might be nice to enable some standard keyboard
> > >>>>navigation too.
> > >>>
> > >>>OK well I'll play around with this some more and I'll get back to
> you
> > >>>once
> > >>>I have what I think is a complete, working patch.
> > >>>
> > >>>Cheers,
> > >>>
> > >>>Tim Leslie
> > >>>
> > >>>
> > >>>>JDH
> > >>>>
> > >>>
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