[f-spot] Remove a dependency on PhotoChanges.

[Ruben Vermeersch <rubenv src gnome org>]

commit 1f8b3f2eb9cf899d936c301c2cb74007035ee9a0
Author: Ruben Vermeersch <ruben savanne be>
Date:   Sun May 23 11:58:32 2010 +0200

    Remove a dependency on PhotoChanges.

 src/Core/IBrowsableItemChanges.cs |   11 +++++++++++
 src/MainWindow.cs                 |    4 ++--
 2 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/src/Core/IBrowsableItemChanges.cs b/src/Core/IBrowsableItemChanges.cs
index 79a3be7..4bcc510 100644
--- a/src/Core/IBrowsableItemChanges.cs
+++ b/src/Core/IBrowsableItemChanges.cs
@@ -29,4 +29,15 @@ namespace FSpot
 			get { return true; }
 		}
 	}
+
+	public class InvalidateData : IBrowsableItemChanges
+	{
+		static InvalidateData instance = new InvalidateData ();
+		public static InvalidateData Instance {
+			get { return instance; } 
+		}
+
+		public bool DataChanged { get { return true; } }
+		public bool MetadataChanged { get { return false; } }
+	}
 }
diff --git a/src/MainWindow.cs b/src/MainWindow.cs
index fbc928e..c990495 100644
--- a/src/MainWindow.cs
+++ b/src/MainWindow.cs
@@ -918,7 +918,7 @@ namespace FSpot
 			
 			int [] selected_ids = SelectedIds ();
 			if (command.Execute (direction, SelectedPhotos (selected_ids)))
-				query.MarkChanged (selected_ids, new PhotoChanges () {DataChanged = true});
+				query.MarkChanged (selected_ids, InvalidateData.Instance);
 		}
 	
 		//
@@ -2343,7 +2343,7 @@ namespace FSpot
 	
 			int [] selected_ids = SelectedIds ();
 			if (command.Execute (SelectedPhotos (selected_ids)))
-				query.MarkChanged (selected_ids, new PhotoChanges {DataChanged = true});
+				query.MarkChanged (selected_ids, InvalidateData.Instance);
 		}
 	
 		public void HandleRotate90Command (object sender, EventArgs args)