Re: Keypress and gtk_drawing_area

[Olexiy Avramchenko <olexiy irtech cn ua>]

Russell Shaw wrote:

> Hi,
> When i press a key, the callback is invoked ok with:
>
>   
> g_signal_connect(G_OBJECT(window),"key_press_event",G_CALLBACK(key_press_cb),NULL);
>
>
> Now i put a gtk_drawing_area in window and did:
>
>   gtk_widget_set_events(drawing_area,GDK_KEY_PRESS_MASK);
>   
> g_signal_connect(G_OBJECT(draw_area),"key_press_event",G_CALLBACK(key_press_cb),NULL);
>
> but the callback no longer works.

You should:
1. Set GTK_CAN_FOCUS flag on area.
2. Use gtk_widget_grab_focus() function to grab keyboard focus.
http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#gtk-widget-grab-focus

You can check whether your widget already has a focus with 
GTK_WIDGET_HAS_FOCUS macro.

In my app I grab the focus when user press the mouse button on drawing area.

   Olexiy