Cannot get key_press_event to work with gtk builder

Community matplotlib-users
1

Hi

I have tried the mpl and glade examples and tried different approaches
from the net, but I can only get button_press_event to work with a matplot
canvas. key_press_event does not work using gtkagg for GUI.

Is this due to the gtk builder 2.16? I mean does the main window steal the
key_presses or something?

I had previously tried an example without a gtk gui (don't remember the
example). There a callback was connected and it could get events
containing both mouse click and keypress. I mean if I pressed the mouse
button while keeping doen say 'e' I could get form event.key that 'e' was
pressed when I click the mouse.

I have to use gtk for the rest of the GUI so when I tried to pack the
canvas into gtk I got the problem that callbacks and connections didn't
work. i guess it has to do with that gtk has it's own callback system.

If anybody has some example code, tips or tricks, I would very much
appreciate that. I cannot at the moment provide an example code due to
project deadline, but will do afterwards.

thanks in advance

Preben

2

I've seen this before when an mpl canvas is placed in a gtk notebook
widget for example. The containing class swallows the kwy press
event. What has worked for me before is to grab the focus with the
mpl FigureCanvas:

  canvas.grab_focus()

Thanks,
JDH

ยทยทยท

On Tue, Jul 13, 2010 at 5:34 AM, Preben Randhol <randhol@...3174...> wrote:

Hi

I have tried the mpl and glade examples and tried different approaches
from the net, but I can only get button_press_event to work with a matplot
canvas. key_press_event does not work using gtkagg for GUI.

Is this due to the gtk builder 2.16? I mean does the main window steal the
key_presses or something?

I had previously tried an example without a gtk gui (don't remember the
example). There a callback was connected and it could get events
containing both mouse click and keypress. I mean if I pressed the mouse
button while keeping doen say 'e' I could get form event.key that 'e' was
pressed when I click the mouse.

I have to use gtk for the rest of the GUI so when I tried to pack the
canvas into gtk I got the problem that callbacks and connections didn't
work. i guess it has to do with that gtk has it's own callback system.

If anybody has some example code, tips or tricks, I would very much
appreciate that. I cannot at the moment provide an example code due to
project deadline, but will do afterwards.