diff options
Diffstat (limited to 'gtk/gtkwidget.c')
| -rw-r--r-- | gtk/gtkwidget.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c index c7406fc882..23ab0d8e62 100644 --- a/gtk/gtkwidget.c +++ b/gtk/gtkwidget.c @@ -706,6 +706,7 @@ static void gtk_widget_set_device_enabled_internal (GtkWidget *widget, GdkDevice *device, gboolean recurse, gboolean enabled); +static gboolean event_window_is_still_viewable (GdkEvent *event); /* --- variables --- */ static gpointer gtk_widget_parent_class = NULL; @@ -5951,6 +5952,59 @@ gtk_widget_event (GtkWidget *widget, return gtk_widget_event_internal (widget, event); } +void +_gtk_widget_set_captured_event_handler (GtkWidget *widget, + GtkCapturedEventHandler callback) +{ + g_object_set_data (G_OBJECT (widget), "captured-event-handler", callback); +} + +gboolean +_gtk_widget_captured_event (GtkWidget *widget, + GdkEvent *event) +{ + gboolean return_val = FALSE; + GtkCapturedEventHandler handler; + + g_return_val_if_fail (GTK_IS_WIDGET (widget), TRUE); + g_return_val_if_fail (WIDGET_REALIZED_FOR_EVENT (widget, event), TRUE); + + if (event->type == GDK_EXPOSE) + { + g_warning ("Events of type GDK_EXPOSE cannot be synthesized. To get " + "the same effect, call gdk_window_invalidate_rect/region(), " + "followed by gdk_window_process_updates()."); + return TRUE; + } + + if (!event_window_is_still_viewable (event)) + return TRUE; + + handler = g_object_get_data (G_OBJECT (widget), "captured-event-handler"); + if (!handler) + return FALSE; + + g_object_ref (widget); + + return_val = handler (widget, event); + return_val |= !WIDGET_REALIZED_FOR_EVENT (widget, event); + + /* The widget that was originally to receive the event + * handles motion hints, but the capturing widget might + * not, so ensure we get further motion events. + */ + if (return_val && + event->type == GDK_MOTION_NOTIFY && + event->motion.is_hint && + (gdk_window_get_events (event->any.window) & + GDK_POINTER_MOTION_HINT_MASK) != 0) + gdk_event_request_motions (&event->motion); + + g_object_unref (widget); + + return return_val; +} + /* Returns TRUE if a translation should be done */ gboolean _gtk_widget_get_translation_to_window (GtkWidget *widget, |