[gtkmm] TreeView: Add get_n_columns().

[Murray Cumming <murrayc src gnome org>]

commit a5fea5fcf5fb3aab1a8da480d2bd43fc5e787d13
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Mar 26 18:45:33 2012 +0200

    TreeView: Add get_n_columns().
    
    * gtk/src/treeview.hg: Wrap gtk_tree_view_get_n_columns().

 ChangeLog           |   20 +++++++++++++-------
 gtk/src/treeview.hg |    2 ++
 2 files changed, 15 insertions(+), 7 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 50d1f8f..0cbc6b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2012-03-26  Murray Cumming  <murrayc murrayc com>
+
+	TreeView: Add get_n_columns().
+
+	* gtk/src/treeview.hg: Wrap gtk_tree_view_get_n_columns().
+
+2012-03-26  Murray Cumming  <murrayc murrayc com>
+
+	MenuItem, MenuShell: Add signals.
+
+	* gtk/src/menuitem.hg: Add signal_select() and signal_deselect(), 
+	* gtk/src/menushell.hg: Add signal_insert().
+
 2012-03-26  Kjell Ahlstedt  <kjell ahlstedt bredband net>
 
 	Gdk::Display: Deprecate the set_double_click_[time|distance]() methods.
@@ -14,13 +27,6 @@
 
 2012-03-26  Murray Cumming  <murrayc murrayc com>
 
-	MenuItem, MenuShell: Add signals.
-
-	* gtk/src/menuitem.hg: Add signal_select() and signal_deselect(), 
-	* gtk/src/menushell.hg: Add signal_insert().
-
-2012-03-26  Murray Cumming  <murrayc murrayc com>
-
 	ComboBox: Add signal_format_entry_text().
 
 	* gtk/src/gtk_signals.defs: Correct the costness of the gchar* result.
diff --git a/gtk/src/treeview.hg b/gtk/src/treeview.hg
index 263b429..fad4e61 100644
--- a/gtk/src/treeview.hg
+++ b/gtk/src/treeview.hg
@@ -279,6 +279,8 @@ public:
    */
   int insert_column_with_data_func(int position, const Glib::ustring& title, CellRenderer& cell, const SlotCellData& slot);
 
+  _WRAP_METHOD(guint get_n_columns() const, gtk_tree_view_get_n_columns)
+
   _WRAP_METHOD(TreeViewColumn* get_column(int n), gtk_tree_view_get_column)
   _WRAP_METHOD(const TreeViewColumn* get_column(int n) const, gtk_tree_view_get_column, constversion)