>My application has a drawing-area, menu, and a frame with check-button in it.
>
>In the drawing-area, I assign "key press event" to it. It work find for key
>like "a" and "b", but does not work for arrow key. Once I press a arrow key,
>the "check button" grab that input, and subsequently, all key is grab by the
>"check button". The same will happen if I point at the menu-bar and click in a
>empty space following by pressing a key. What I need is:
>
>If the pointer is in the drawing-area, drawing-area should grab all key event.
the arrow buttons, tab key and enter key are all considered "special"
by GTK+, and are used (by default) to move the keyboard focus around
between widgets. there is no way to turn off this behaviour in a
global sense, but it can be handled on a per-widget basis.
if you have a widget that needs to be able use any of these keys as a
"normal" key, you need to connect to the widgets "key_press_event"
signal with a handler that does something like this:
gint
key_press_handler (GtkWidget *widget, GdkEventKey *event, gpointer data)
{
int stop_emission = FALSE;
switch (event->keyval){
case GDK_Up:
case GDK_Down:
case GDK_Left:
case GDK_Right:
stop_emission = TRUE;
break;
default:
break;
}
if (stop_emission) {
/* don't let the rest of GTK+ see this key */
gtk_signal_stop_emit_by_name (GTK_OBJECT(widget),
"key_press_event");
}
.... rest of your conventional key handling ...
return TRUE;
}
--p
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