[banshee] [InternetArchive] Lazy-load items' data and GUI

[Gabriel Burt <gburt src gnome org>]

commit d254f4798ba4b5f7474af83ce89331026a47cd6d
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Thu Jan 28 18:23:08 2010 -0800

    [InternetArchive] Lazy-load items' data and GUI

 .../Banshee.Sources.Gui/LazyLoadSourceContents.cs  |    6 ++++-
 .../Banshee.InternetArchive/DetailsSource.cs       |   21 +++++++++++++++----
 .../Banshee.InternetArchive/DetailsView.cs         |   12 +++++++---
 3 files changed, 29 insertions(+), 10 deletions(-)
---
diff --git a/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/LazyLoadSourceContents.cs b/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/LazyLoadSourceContents.cs
index d27e81f..390a990 100644
--- a/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/LazyLoadSourceContents.cs
+++ b/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/LazyLoadSourceContents.cs
@@ -37,7 +37,7 @@ namespace Banshee.Sources.Gui
     public class LazyLoadSourceContents<T> : ISourceContents, IDisposable where T : ISourceContents
     {
         private object [] args;
-        private ISourceContents actual_contents;
+        private T actual_contents;
         private ISourceContents ActualContents {
             get {
                 if (actual_contents == null) {
@@ -75,6 +75,10 @@ namespace Banshee.Sources.Gui
             ActualContents.ResetSource ();
         }
 
+        public T Contents {
+            get { return actual_contents; }
+        }
+
         public ISource Source {
             get { return ActualContents.Source; }
         }
diff --git a/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsSource.cs b/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsSource.cs
index ba65e86..011e763 100644
--- a/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsSource.cs
+++ b/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsSource.cs
@@ -49,6 +49,7 @@ using Banshee.Playlist;
 using Banshee.Preferences;
 using Banshee.ServiceStack;
 using Banshee.Sources;
+using Banshee.Sources.Gui;
 
 using IA=InternetArchive;
 
@@ -58,7 +59,7 @@ namespace Banshee.InternetArchive
     {
         private Item item;
         private MemoryTrackListModel track_model;
-        private DetailsView gui;
+        private LazyLoadSourceContents<DetailsView> gui;
 
         public Item Item {
             get { return item; }
@@ -78,14 +79,24 @@ namespace Banshee.InternetArchive
 
             SetIcon ();
 
-            gui = new DetailsView (this, item);
-            Properties.Set<Gtk.Widget> ("Nereid.SourceContents", gui);
+            gui = new LazyLoadSourceContents<DetailsView> (this, item);
+            Properties.Set<ISourceContents> ("Nereid.SourceContents", gui);
+        }
+
+        private bool details_loaded;
+        internal void LoadDetails ()
+        {
+            if (details_loaded) {
+                return;
+            }
+
+            details_loaded = true;
 
             if (item.Details == null) {
                 SetStatus (Catalog.GetString ("Getting item details from the Internet Archive"), false, true, null);
                 Load ();
             } else {
-                gui.UpdateDetails ();
+                gui.Contents.UpdateDetails ();
             }
         }
 
@@ -124,7 +135,7 @@ namespace Banshee.InternetArchive
                 ThreadAssist.ProxyToMain (delegate {
                     ClearMessages ();
                     if (item.Details != null) {
-                        gui.UpdateDetails ();
+                        gui.Contents.UpdateDetails ();
                     }
                 });
             } catch (Exception e) {
diff --git a/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsView.cs b/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsView.cs
index 719c445..9ebfe8e 100644
--- a/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsView.cs
+++ b/src/Extensions/Banshee.InternetArchive/Banshee.InternetArchive/DetailsView.cs
@@ -69,16 +69,20 @@ namespace Banshee.InternetArchive
         {
             this.source = source;
             this.item = item;
-
             Spacing = 6;
+            source.LoadDetails ();
         }
 
+        private bool gui_built;
         public void UpdateDetails ()
         {
             details = item.Details;
-            BuildInfoBox ();
-            BuildFilesBox ();
-            ShowAll ();
+            if (!gui_built && details != null) {
+                gui_built = true;
+                BuildInfoBox ();
+                BuildFilesBox ();
+                ShowAll ();
+            }
         }
 
 #region ISourceContents