container: Add snapshot() implementation

Note that this implementation does not respect GDK windows at all. If
your widget requires respecting them, you should write your own
snapshot implementation and not chain up.

diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index e82f86c75bbde75d7766e725ba5b4e35245ddecd..673135f1355bebad987b19714f9002da5342f606 100644 (file)
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -325,6 +325,8 @@ static void     gtk_container_children_callback    (GtkWidget         *widget,
 static void     gtk_container_show_all             (GtkWidget         *widget);
 static gint     gtk_container_draw                 (GtkWidget         *widget,
                                                     cairo_t           *cr);
+static void     gtk_container_snapshot             (GtkWidget         *widget,
+                                                    GtkSnapshot       *snapshot);
 static void     gtk_container_map                  (GtkWidget         *widget);
 static void     gtk_container_unmap                (GtkWidget         *widget);
 static GtkSizeRequestMode gtk_container_get_request_mode (GtkWidget   *widget);
@@ -462,6 +464,7 @@ gtk_container_class_init (GtkContainerClass *class)
   widget_class->destroy = gtk_container_destroy;
   widget_class->compute_expand = gtk_container_compute_expand;
   widget_class->show_all = gtk_container_show_all;
+  widget_class->snapshot = gtk_container_snapshot;
   widget_class->draw = gtk_container_draw;
   widget_class->map = gtk_container_map;
   widget_class->unmap = gtk_container_unmap;
@@ -3078,6 +3081,26 @@ gtk_container_draw (GtkWidget *widget,
   return FALSE;
 }
 
+static void
+gtk_container_snapshot_forall (GtkWidget *child,
+                               gpointer   snapshot)
+{
+  gtk_container_snapshot_child (GTK_CONTAINER (_gtk_widget_get_parent (child)),
+                                child,
+                                snapshot);
+}
+
+static void
+gtk_container_snapshot (GtkWidget   *widget,
+                        GtkSnapshot *snapshot)
+{
+  GtkContainer *container = GTK_CONTAINER (widget);
+  
+  gtk_container_forall (container,
+                        gtk_container_snapshot_forall,
+                        snapshot);
+}
+
 static void
 gtk_container_map_child (GtkWidget *child,
                          gpointer   client_data)