Re: keyboard events

[David Nečas (Yeti) <yeti physics muni cz>]

On Tue, Aug 01, 2006 at 03:38:19PM +0100, Richard Vaughan wrote:
> I am trying to capture key presses in a window, but the window seems
> to be ignoring the signals.

I suppose you mean a drawing area widget as your code
indicates, not a GtkWindow (you should have no problems
receiving GtkWindow's keyboard events).

> 
> GtkWidget* mainWindow = gtk_drawing_area_new();
> ...
> gtk_widget_add_events(mainWindow, (GDK_KEY_RELEASE_MASK | GDK_KEY_PRESS_MASK));
> gtk_signal_connect(GTK_OBJECT( mainWindow ),
>                             "key_press_event",
>                             G_CALLBACK( key_press_win ),
>                             NULL);

Note gtk_signal_connect() is *long time* deprecated and the
canonical event naming is with dashes: "key-press-event".

> static gboolean key_press_win(GtkWidget* w, GdkEventKey* key, gpointer data) {
>     printf("press.\n");
> 
>     return false;
> }
> 
> 
> I was expecting to see some output on the console, but nothing shows
> up. The window does also have mouse click event handlers, which work
> fine....
> 
> Can anyone see what I have done wrong?

The drawing area has to have keyboard focus to get keyboard
events.  Set its "can-focus" property to TRUE.  It also has
to get the focus somehow, widgets that can have keyboard
focus typically grab it with gtk_widget_grab_focus() when
one clicks on them with mouse.

Yeti


--
Anonyms eat their boogers.