Re: Can A Drawable Canvas Receive Key Events?

[Mike Melanson <mike multimedia cx>]

Mike Melanson wrote:
> Tristan Van Berkom wrote:
> > Did you add the events to the event mask before the widget was
> > realized ?
> >
> > Does the widget in question have keyboard focus at the time
> > you want to recieve the keyboard events ?
> >
> > Is the widget in question marked to be focus-capable ?
> > (i.e. the can-focus bit/property)
>
> This last item did the trick. I set the can-focus property and the 
> GtkDrawingArea now registers key presses and releases. Thanks.
>
> Now that it works in the contrived standalone app, I need to figure out 
> how to get key events in an XEmbed'ed application. I apply the same 
> can-focus property change but I'm afraid I might be fighting with the 
> hosting app for the key events.

Answering my own question since I know there are interested people out 
there...

I found that when I put a big text widget inside the XEmbed'ed GtkPlug 
container instead of a big drawable canvas, it was able to receive 
focus. Digging into the GTK source code, I noticed that it calls 
gtk_widget_grab_focus() when it receives a button press event. So I did 
the same for my canvas widget when the user clicks in it, and it seems 
to work. The widget retains focus until the user clicks outside of the 
window.

Wow, I can't believe that looking at the source actually helped. :)

--
        -Mike Melanson