!GTK_OBJECT_DESTROYED() -> GTK_WIDGET_REALIZE() for resize queueing.

!GTK_OBJECT_DESTROYED() -> GTK_WIDGET_REALIZE() for resize queueing.

Thu Jun 28 23:53:31 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtkwidget.c (gtk_widget_hide): !GTK_OBJECT_DESTROYED() ->
        GTK_WIDGET_REALIZE() for resize queueing.

        * gtk/gtkmain.c (gtk_main_do_event): !GTK_OBJECT_DESTROYED() ->
        GTK_WIDGET_REALIZE() for post event delivery destruction upon
        GDK_DESTROY.

        * gtk/gtkwidget.c: added GtkWidget::event-after notification signal, to
        sompensate for former (pre-2.0) connect_after() facility.
        (gtk_widget_send_expose):
        (gtk_widget_event): assert the widget is realized, since event delivery
        to non-realized widgets is essentially a bug. event handlers should
        be able to unconditionally rely on widget->window (unless they
        emit events on their own which can trigger widget destruction).
        (gtk_widget_event_internal): removed old outdated GTK_OBJECT_DESTROYED()
        logic. event delivery happens as follows:
        a) emission of GtkWidget::event (RUN_LAST handler). returns was_handled.
        b) if !was_handled in (a) and the widget is still realized, emit event-
           specific signal (RUN_LAST handler). returns was_handled.
        c) emission of GtkWidget::event-after for notification if the widget is
           still realized (regardless of was_handled from previous stages, no
           class handler). no return value.
        d) was_handled gets passed on to caller, to determine further
           propagation. if the widget got unrealized meanwhile, was_handled
           is returned as TRUE.

        * gdk/gdkevents.[hc]: added gdk_event_get_root_coords() and
        gdk_event_get_coords().