Sets the GtkWidgetClass.activate_signal field with the signal id for
the given @signal_name; the signal will be emitted when calling
gtk_widget_activate().
The @signal_name of @widget_type must have been registered with
g_signal_new() or g_signal_newv() before calling this function.
Sets the GtkWidgetClass.activate_signal field with the signal id for the given @signal_name; the signal will be emitted when calling gtk_widget_activate().
The @signal_name of @widget_type must have been registered with g_signal_new() or g_signal_newv() before calling this function.