Re: [Matplotlib-users] Re: capturing arrow key events

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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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