[cheese] Handle photo/video moved to monitored directories

[David King <davidk src gnome org>]

commit 2204b80e8f72f421cee347e3fe5f35ecf6b73ca5
Author: Raluca Elena Podiuc <ralucaelena1985 gmail com>
Date:   Wed Jul 13 14:21:27 2011 +0300

    Handle photo/video moved to monitored directories
    
    Camerabin2 creates a temporary file, writes data to it and in the end it
    moves it to the destination path.
    
    Without G_FILE_MONITOR_SEND_MOVED to g_file_monitor_directory, moves
    would be sent as DELETE + CREATE.
    
    Unfortunately, we would also get CREATE events when the temporary file
    was created. We cannot listen for CREATE events as temporary files would
    be CREATEd and then CHANGEd and the thumb-view creation code would work
    with bad data.
    
    By using G_FILE_MONITOR_SEND_MOVED we get a single event when the file
    is moved. As the file monitor ignores files with unknown extensions (as
    is the case for the temporary files created by camerabin2) we could only
    just append the new file. But because the user might also move a
    picture/video manually from the Pictures/Webcam or Videos/Webcam
    directories, removing the old file from the thumb-view keeps it
    up-to-date with the state of the file system.
    
    If camerabin2 switches away from the create-temp+move approach, to the
    camerabin one (create the destination file directly), we're prepared
    to handle that code with G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT.

 src/thumbview/cheese-thumb-view.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/thumbview/cheese-thumb-view.c b/src/thumbview/cheese-thumb-view.c
index feaafcf..3ca6293 100644
--- a/src/thumbview/cheese-thumb-view.c
+++ b/src/thumbview/cheese-thumb-view.c
@@ -368,9 +368,16 @@ cheese_thumb_view_monitor_cb (GFileMonitor     *file_monitor,
     case G_FILE_MONITOR_EVENT_DELETED:
       cheese_thumb_view_remove_item (thumb_view, file);
       break;
+
+    case G_FILE_MONITOR_EVENT_MOVED:
+      cheese_thumb_view_remove_item (thumb_view, file);
+      cheese_thumb_view_append_item (thumb_view, other_file);
+      break;
+
     case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
       cheese_thumb_view_append_item (thumb_view, file);
       break;
+
     default:
       break;
   }
@@ -727,7 +734,7 @@ cheese_thumb_view_start_monitoring_photo_path (CheeseThumbView *thumb_view, cons
 
   /* connect signal to photo path */
   file                     = g_file_new_for_path (path_photos);
-  priv->photo_file_monitor = g_file_monitor_directory (file, 0, NULL, NULL);
+  priv->photo_file_monitor = g_file_monitor_directory (file, G_FILE_MONITOR_SEND_MOVED, NULL, NULL);
   g_signal_connect (priv->photo_file_monitor, "changed", G_CALLBACK (cheese_thumb_view_monitor_cb), thumb_view);
 
   g_object_unref (file);
@@ -746,7 +753,7 @@ cheese_thumb_view_start_monitoring_video_path (CheeseThumbView *thumb_view, cons
 
   /* connect signal to video path */
   file                     = g_file_new_for_path (path_videos);
-  priv->video_file_monitor = g_file_monitor_directory (file, 0, NULL, NULL);
+  priv->video_file_monitor = g_file_monitor_directory (file, G_FILE_MONITOR_SEND_MOVED, NULL, NULL);
   g_signal_connect (priv->video_file_monitor, "changed", G_CALLBACK (cheese_thumb_view_monitor_cb), thumb_view);
 
   g_object_unref (file);