[gtk+/scrollable-indicator] GtkTreeView: Implement get_border

[Matthias Clasen <matthiasc src gnome org>]

commit b3c079bdb202ad70277b0ca8cc30a0539f194b6f
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Dec 10 06:48:56 2014 -0500

    GtkTreeView: Implement get_border
    
    Add an implementation for the new scrollable vfunc that returns
    the header height as top border.

 gtk/gtktreeview.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 8c55dac..2c79b62 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -861,6 +861,9 @@ static GObject *gtk_tree_view_buildable_get_internal_child (GtkBuildable      *b
                                                            const gchar       *childname);
 static void     gtk_tree_view_buildable_init               (GtkBuildableIface *iface);
 
+/* GtkScrollable */
+static void     gtk_tree_view_scrollable_init              (GtkScrollableInterface *iface);
+
 static GtkAdjustment *gtk_tree_view_do_get_hadjustment (GtkTreeView   *tree_view);
 static void           gtk_tree_view_do_set_hadjustment (GtkTreeView   *tree_view,
                                                         GtkAdjustment *adjustment);
@@ -929,7 +932,8 @@ G_DEFINE_TYPE_WITH_CODE (GtkTreeView, gtk_tree_view, GTK_TYPE_CONTAINER,
                          G_ADD_PRIVATE (GtkTreeView)
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
                                                gtk_tree_view_buildable_init)
-                        G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
+                        G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE,
+                                                gtk_tree_view_scrollable_init))
 
 static void
 gtk_tree_view_class_init (GtkTreeViewClass *class)
@@ -16544,3 +16548,18 @@ gtk_tree_view_get_tooltip_column (GtkTreeView *tree_view)
 
   return tree_view->priv->tooltip_column;
 }
+
+static gboolean
+gtk_tree_view_get_border (GtkScrollable *scrollable,
+                          GtkBorder     *border)
+{
+  border->top = _gtk_tree_view_get_header_height (GTK_TREE_VIEW (scrollable));
+
+  return TRUE;
+}
+
+static void
+gtk_tree_view_scrollable_init (GtkScrollableInterface *iface)
+{
+  iface->get_border = gtk_tree_view_get_border;
+}