Re: GnomeCanvas and keyboard focus

[Roger Leigh <rleigh whinlatter ukfsn org>]

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Roger Leigh <rleigh whinlatter ukfsn org> writes:

> This might sound a little vague, but I'm having problems with my
> canvas widget grabbing keyboard focus.  The canvas is packed into a
> derived GtkTable which is packed into a GtkNotebook.  If I click on
> the notebook tab label, it gets a focus dashed-line, but if I then
> click on the canvas this does not disappear.
>
> To try to debug this I've set GTK_CAN_FOCUS, and connected a handler
> (returning FALSE) to "grab-focus" which just g_print's a message, but
> this is only triggered when I use the cursor up key to enter the table
> from the bottom.  It's not called if I enter from the top or click in
> the window (the canvas is in the bottom RHS of the table).

After a little more testing:

- - focus-in-event and focus-out-event are emitted from the canvas when
  I focus in or out with the cursor keys, but focus-in-event is not
  emitted when I click on the canvas.
- - key-press-event is emitted when the canvas is focussed.
- - I disabled all GnomeCanvasItemClass->event handlers in my custom
  canvas items, but to no effect.

So something is preventing focussing with the mouse.  Could anyone
suggest what might be the cause, or how to find out what the cause
might be?


Many thanks,
Roger

- -- 
Roger Leigh
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