[gitg/vala] Added separator functionality for navigation

[Jesse van den Kieboom <jessevdk src gnome org>]

commit b767be325d429db6256a32d2a163d94ea8a63667
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Wed Jul 18 10:08:16 2012 +0200

    Added separator functionality for navigation

 libgitg-ext/gitg-ext-navigation-tree-view.vala |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)
---
diff --git a/libgitg-ext/gitg-ext-navigation-tree-view.vala b/libgitg-ext/gitg-ext-navigation-tree-view.vala
index 806fb00..9b82c4f 100644
--- a/libgitg-ext/gitg-ext-navigation-tree-view.vala
+++ b/libgitg-ext/gitg-ext-navigation-tree-view.vala
@@ -33,7 +33,8 @@ private enum Hint
 {
 	NONE,
 	HEADER,
-	DEFAULT
+	DEFAULT,
+	SEPARATOR
 }
 
 public delegate void NavigationActivated(int numclick);
@@ -149,6 +150,14 @@ public class NavigationTreeModel : Gtk.TreeStore
 		return this;
 	}
 
+	public new NavigationTreeModel separator()
+	{
+		Gtk.TreeIter iter;
+		append_one("", null, Hint.SEPARATOR, null, out iter);
+
+		return this;
+	}
+
 	public uint populate(GitgExt.Navigation? nav)
 	{
 		if (nav == null)
@@ -411,6 +420,13 @@ public class NavigationTreeView : Gtk.TreeView
 			}
 		});
 
+		set_row_separator_func((model, iter) => {
+			Hint hint;
+			model.get(iter, Column.HINT, out hint);
+
+			return hint == Hint.SEPARATOR;
+		});
+
 		append_column(col);
 
 		get_selection().set_select_function((sel, model, path, cursel) => {