Re: Removing key-presses from queue in "key-press-even"

[Havoc Pennington <hp redhat com>]

Janus "N." Tøndering <j nus person dk> writes:
> I am rather new to the GTK+ toolkit (been a windows programmer) and I've
> run into a small problem that I cannot find the answer to in the GTK
> reference. 
>
> I have an application with a gtk_entry and I have a "key-press-event".
> Now I want to capture an GDK_KEY_Up event and do some text stuff. My
> problem now is that the focus should stay on the gtk_entry and not
> change. 
>
> How do I stop the GDK_KEY_Up from being processed further?

You need to return TRUE from the *emission* of key_press_event on the
entry.

By emission, I don't mean signal handler, but rather the invocation of
the entire handler list. A handler list looks like:

 1. Handlers connected with gtk_signal_connect() in 
    connection order
 2. Default handler
 3. Handlers connected with gtk_signal_connect_after()
    in connection order

The return value of the emission is the return value of the last
handler that runs.

Since GtkEntry has a default handler, to change this return value you
have to connect a handler with gtk_signal_connect_after(). 

In that handler, return TRUE. Then the event won't be propagated to
other widgets.

Alternatively, you can use plain gtk_signal_connect(), and call
gtk_signal_emit_stop_by_name() in your handler if the pressed key is
GDK_Up. This stops the emission, guaranteeing that you are the last
handler to run, and thus you get to determine the return value by
returning TRUE.

Havoc