[latexila] Structure: fix sensitivity

[SÃbastien Wilmet <swilmet src gnome org>]

commit 3485e5aead83db86eb3dc2d599ac58963f093a66
Author: SÃbastien Wilmet <swilmet src gnome org>
Date:   Tue Jul 24 02:56:11 2012 +0200

    Structure: fix sensitivity
    
    There were critical messages about this.

 src/main_window.vala           |   10 +++++-----
 src/main_window_structure.vala |   21 +++++++++++++++------
 src/structure.vala             |    4 ++++
 3 files changed, 24 insertions(+), 11 deletions(-)
---
diff --git a/src/main_window.vala b/src/main_window.vala
index 6a6391f..a99a98c 100644
--- a/src/main_window.vala
+++ b/src/main_window.vala
@@ -155,7 +155,6 @@ public class MainWindow : Window
     private Toolbar _edit_toolbar;
     private SidePanel _side_panel;
     private SymbolsView _symbols;
-    private Structure _structure;
     private Paned main_hpaned;
     private Paned vpaned;
 
@@ -166,6 +165,7 @@ public class MainWindow : Window
     private uint documents_list_menu_ui_id;
 
     private MainWindowBuildTools _main_window_build_tools;
+    private MainWindowStructure _main_window_structure;
 
     // context id for the statusbar
     private uint tip_message_cid;
@@ -251,8 +251,8 @@ public class MainWindow : Window
         _symbols = new SymbolsView (this);
 
         // Structure
-        _structure = new Structure (this);
-        new MainWindowStructure (ui_manager, _structure);
+        Structure structure = new Structure (this);
+        _main_window_structure = new MainWindowStructure (ui_manager, structure);
 
         // Bottom panel
         BuildView build_view = new BuildView (this);
@@ -277,7 +277,7 @@ public class MainWindow : Window
         _side_panel = new SidePanel ();
         _side_panel.add_component (_("Symbols"), "symbol_greek", _symbols);
         _side_panel.add_component (_("File Browser"), Stock.OPEN, file_browser);
-        _side_panel.add_component (_("Structure"), Stock.INDEX, _structure);
+        _side_panel.add_component (_("Structure"), Stock.INDEX, structure);
         _side_panel.restore_state ();
 
         // menu and toolbars
@@ -1053,7 +1053,7 @@ public class MainWindow : Window
         settings_window.set_int ("side-panel-size", main_hpaned.get_position ());
         settings_window.set_int ("vertical-paned-position", vpaned.get_position ());
 
-        _structure.save_state ();
+        _main_window_structure.save_state ();
 
         /* ui preferences */
         GLib.Settings settings_ui =
diff --git a/src/main_window_structure.vala b/src/main_window_structure.vala
index fe00d61..ed92e04 100644
--- a/src/main_window_structure.vala
+++ b/src/main_window_structure.vala
@@ -71,16 +71,17 @@ public class MainWindowStructure
 
         ui_manager.insert_action_group (action_group, 0);
 
-        structure.hide.connect (() =>
-        {
-            Gtk.Action menu = ui_manager.get_action ("/MainMenu/Structure");
-            menu.sensitive = false;
-        });
-
         structure.show_popup_menu.connect (show_popup_menu);
+        structure.hide.connect (set_menu_insensitive);
+        structure.no_items_selected.connect (set_menu_insensitive);
         structure.item_selected.connect (set_actions_sensitivity);
     }
 
+    public void save_state ()
+    {
+        _structure.save_state ();
+    }
+
     private void show_popup_menu (Gdk.EventButton? event)
     {
         Gtk.Menu popup_menu = _ui_manager.get_widget ("/StructurePopup") as Gtk.Menu;
@@ -91,6 +92,14 @@ public class MainWindowStructure
             popup_menu.popup (null, null, null, 0, get_current_event_time ());
     }
 
+    private void set_menu_insensitive ()
+    {
+        return_if_fail (_ui_manager != null);
+
+        Gtk.Action menu = _ui_manager.get_action ("/MainMenu/Structure");
+        menu.sensitive = false;
+    }
+
     private void set_actions_sensitivity (StructType type)
     {
         Gtk.Action menu = _ui_manager.get_action ("/MainMenu/Structure");
diff --git a/src/structure.vala b/src/structure.vala
index 97d8a66..f50544b 100644
--- a/src/structure.vala
+++ b/src/structure.vala
@@ -114,6 +114,7 @@ public class Structure : Grid
     private static string[] _names = null;
     private static string[] _action_names = null;
 
+    public signal void no_items_selected ();
     public signal void item_selected (StructType type);
     public signal void show_popup_menu (Gdk.EventButton? event);
 
@@ -309,7 +310,10 @@ public class Structure : Grid
         {
             // always allow deselect
             if (path_currently_selected)
+            {
+                no_items_selected ();
                 return true;
+            }
 
             return select_tree_row (path);
         });