[tomboy] Disable synchronization menu items unless a backend is configured

[Benjamin Podszun <bpodszun src gnome org>]

commit 5bfe43adc8d6e76b69febdafb81d479c3a066ced
Author: Benjamin Podszun <benjamin podszun gmail com>
Date:   Fri May 22 12:45:53 2009 +0200

    Disable synchronization menu items unless a backend is configured
    
    Fixes bug #473335
---
 Tomboy/NoteWindow.cs                  |   33 +++++++++++++++++++++++++++------
 Tomboy/Synchronization/SyncManager.cs |   20 ++++++++++++++++++--
 2 files changed, 45 insertions(+), 8 deletions(-)

diff --git a/Tomboy/NoteWindow.cs b/Tomboy/NoteWindow.cs
index 2da95ab..35e0422 100644
--- a/Tomboy/NoteWindow.cs
+++ b/Tomboy/NoteWindow.cs
@@ -18,6 +18,7 @@ namespace Tomboy
 		Gtk.ToolButton link_button;
 		NoteTextMenu text_menu;
 		Gtk.Menu plugin_menu;
+		Gtk.ImageMenuItem sync_menu_item;
 		Gtk.TextView editor;
 		Gtk.ScrolledWindow editor_window;
 		NoteFindBar find_bar;
@@ -184,6 +185,8 @@ namespace Tomboy
 
 		protected override bool OnDeleteEvent (Gdk.Event evnt)
 		{
+			Preferences.SettingChanged -= Preferences_SettingChanged;
+
 			CloseWindowHandler (null, null);
 			return true;
 		}
@@ -507,17 +510,35 @@ namespace Tomboy
 
 			tb.Insert (new Gtk.SeparatorToolItem (), -1);
 
-			Gtk.ImageMenuItem item =
-			        new Gtk.ImageMenuItem (Catalog.GetString ("Synchronize Notes"));
-			item.Image = new Gtk.Image (Gtk.Stock.Convert, Gtk.IconSize.Menu);
-			item.Activated += SyncItemSelected;
-			item.Show ();
-			PluginMenu.Add (item);
+			sync_menu_item = new Gtk.ImageMenuItem (Catalog.GetString ("Synchronize Notes"));
+			sync_menu_item.Image = new Gtk.Image (Gtk.Stock.Convert, Gtk.IconSize.Menu);
+			sync_menu_item.Activated += SyncItemSelected;
+			sync_menu_item.Show ();
+			PluginMenu.Add (sync_menu_item);
+
+			// We might want to know when various settings are altered.
+			Preferences.SettingChanged += Preferences_SettingChanged;
+
+			// Update items based on configuration.
+			UpdateMenuItems ();
 
 			tb.ShowAll ();
 			return tb;
 		}
 
+		void Preferences_SettingChanged (object sender, EventArgs args)
+		{
+			// Update items based on configuration.
+			UpdateMenuItems ();
+		}
+
+		void UpdateMenuItems ()
+		{
+			// Is synchronization configured and active?
+			string sync_addin_id = Preferences.Get (Preferences.SYNC_SELECTED_SERVICE_ADDIN) as string;
+			sync_menu_item.Sensitive = !string.IsNullOrEmpty (sync_addin_id);
+		}
+
 		void SyncItemSelected (object sender, EventArgs args)
 		{
 			Tomboy.ActionManager ["NoteSynchronizationAction"].Activate ();
diff --git a/Tomboy/Synchronization/SyncManager.cs b/Tomboy/Synchronization/SyncManager.cs
index 51c0fcf..e2d7924 100644
--- a/Tomboy/Synchronization/SyncManager.cs
+++ b/Tomboy/Synchronization/SyncManager.cs
@@ -151,7 +151,7 @@ namespace Tomboy.Sync
 			// is the first reference to SyncManager
 
 			///
-			/// Add a "Synchronize Notes" to Tomboy's Tray Icon Menu
+			/// Add a "Synchronize Notes" to Tomboy's Main Menu
 			///
 			Gtk.ActionGroup action_group = new Gtk.ActionGroup ("Sync");
 			action_group.Add (new Gtk.ActionEntry [] {
@@ -162,7 +162,6 @@ namespace Tomboy.Sync
 				delegate {
 					Tomboy.ActionManager ["NoteSynchronizationAction"].Activate ();
 				})
-//     delegate { SyncManager.OpenNoteSyncWindow (); })
 			});
 
 			Tomboy.ActionManager.UI.AddUiFromString (@"
@@ -191,6 +190,23 @@ namespace Tomboy.Sync
 					// TODO: Call something like AddinManager.Disable (addin)
 				}
 			}
+
+			Preferences.SettingChanged += Preferences_SettingChanged;
+
+			// Update sync item based on configuration.
+			UpdateSyncAction ();
+		}
+
+		static void Preferences_SettingChanged (object sender, EventArgs args)
+		{
+			// Update sync item based on configuration.
+			UpdateSyncAction ();
+		}
+
+		static void UpdateSyncAction ()
+		{
+			string sync_addin_id = Preferences.Get (Preferences.SYNC_SELECTED_SERVICE_ADDIN) as string;
+			Tomboy.ActionManager["SyncNotesAction"].Sensitive = !string.IsNullOrEmpty (sync_addin_id);
 		}
 
 		public static void PerformSynchronization ()