[libegg/spread-table-dnd: 3/78] Make EggSpreadTable cooperate better with subclasses.

[Tristan Van Berkom <tvb src gnome org>]

commit e38f47172944ac09837317e665d3c6588aab247f
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Fri Mar 11 00:09:16 2011 +0900

    Make EggSpreadTable cooperate better with subclasses.
    
     o Chain up in ->size_allocate() in case a subclass uses a GdkWindow
     o Create ->insert_child() vfunc so that subclasses can play a role
       both when adding and removing children

 libegg/spreadtable/eggspreadtable.c |   46 ++++++++++++++++++++++++----------
 libegg/spreadtable/eggspreadtable.h |    4 +++
 2 files changed, 36 insertions(+), 14 deletions(-)
---
diff --git a/libegg/spreadtable/eggspreadtable.c b/libegg/spreadtable/eggspreadtable.c
index c5dbbd1..6f191c8 100644
--- a/libegg/spreadtable/eggspreadtable.c
+++ b/libegg/spreadtable/eggspreadtable.c
@@ -1,5 +1,5 @@
 /* gtkspreadtable.c
- * Copyright (C) 2007-2010 Openismus GmbH
+ * Copyright (C) 2010 Openismus GmbH
  *
  * Authors:
  *      Tristan Van Berkom <tristanvb openismus com>
@@ -71,7 +71,6 @@ static void egg_spread_table_set_property         (GObject             *object,
 						   GParamSpec          *pspec);
 
 /* GtkWidgetClass */
-
 static GtkSizeRequestMode egg_spread_table_get_request_mode (GtkWidget *widget);
 static void egg_spread_table_get_width            (GtkWidget           *widget,
 						   gint                *minimum_size,
@@ -104,6 +103,11 @@ static void egg_spread_table_forall               (GtkContainer        *containe
 static GType egg_spread_table_child_type          (GtkContainer        *container);
 
 
+/* EggSpreadTableClass */
+static void  egg_spread_table_real_insert_child   (EggSpreadTable      *table,
+						   GtkWidget           *child,
+						   gint                 index);
+
 G_DEFINE_TYPE_WITH_CODE (EggSpreadTable, egg_spread_table, GTK_TYPE_CONTAINER,
 			 G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
 
@@ -143,6 +147,8 @@ egg_spread_table_class_init (EggSpreadTableClass *class)
   container_class->forall             = egg_spread_table_forall;
   container_class->child_type         = egg_spread_table_child_type;
 
+  class->insert_child = egg_spread_table_real_insert_child;
+
   gtk_container_class_handle_border_width (container_class);
 
   /* GObjectClass properties */
@@ -781,7 +787,7 @@ egg_spread_table_size_allocate (GtkWidget     *widget,
   gint                   item_spacing;
   GtkOrientation         opposite_orientation;
 
-  gtk_widget_set_allocation (widget, allocation);
+  GTK_WIDGET_CLASS (egg_spread_table_parent_class)->size_allocate (widget, allocation);
 
   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
     full_thickness = allocation->height;
@@ -884,6 +890,28 @@ egg_spread_table_child_type (G_GNUC_UNUSED GtkContainer   *container)
   return GTK_TYPE_WIDGET;
 }
 
+
+/*****************************************************
+ *                EggSpreadTableClass                *
+ *****************************************************/
+static void
+egg_spread_table_real_insert_child (EggSpreadTable *table,
+				    GtkWidget      *child,
+				    gint            index)
+{
+  EggSpreadTablePrivate *priv;
+  GList                 *list;
+
+  priv = table->priv;
+
+  list = g_list_find (priv->children, child);
+  g_return_if_fail (list == NULL);
+
+  priv->children = g_list_insert (priv->children, child, index);
+
+  gtk_widget_set_parent (child, GTK_WIDGET (table));
+}
+
 /*****************************************************
  *                       API                         *
  *****************************************************/
@@ -920,20 +948,10 @@ egg_spread_table_insert_child (EggSpreadTable *table,
 			       GtkWidget      *child,
 			       gint            index)
 {
-  EggSpreadTablePrivate *priv;
-  GList                 *list;
-
   g_return_if_fail (EGG_IS_SPREAD_TABLE (table));
   g_return_if_fail (GTK_IS_WIDGET (child));
 
-  priv = table->priv;
-
-  list = g_list_find (priv->children, child);
-  g_return_if_fail (list == NULL);
-
-  priv->children = g_list_insert (priv->children, child, index);
-
-  gtk_widget_set_parent (child, GTK_WIDGET (table));
+  EGG_SPREAD_TABLE_GET_CLASS (table)->insert_child (table, child, index);
 }
 
 
diff --git a/libegg/spreadtable/eggspreadtable.h b/libegg/spreadtable/eggspreadtable.h
index 7531a80..50fa8fd 100644
--- a/libegg/spreadtable/eggspreadtable.h
+++ b/libegg/spreadtable/eggspreadtable.h
@@ -51,6 +51,10 @@ struct _EggSpreadTable
 struct _EggSpreadTableClass
 {
   GtkContainerClass parent_class;
+
+  void    ( *insert_child)   (EggSpreadTable *table,
+			      GtkWidget      *child,
+			      gint            index);
 };