[f-spot/cleanup-backend: 10/23] Add PhotoModelSelection as subclass of Hyena.Collections.Selection

[Mike Gemünde <mgemuende src gnome org>]

commit 9085700f7412aa88ad12508905c3078dc8371fdd
Author: Mike Gemünde <mike gemuende de>
Date:   Fri Jul 16 10:23:29 2010 +0200

    Add PhotoModelSelection as subclass of Hyena.Collections.Selection
    
    The new class provides some other selection methods related to photo
    collections.

 src/Core/Makefile.am       |    1 +
 src/Core/PhotoSelection.cs |  157 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 158 insertions(+), 0 deletions(-)
---
diff --git a/src/Core/Makefile.am b/src/Core/Makefile.am
index 0493112..8443bd5 100644
--- a/src/Core/Makefile.am
+++ b/src/Core/Makefile.am
@@ -24,6 +24,7 @@ SOURCES = \
 	ISource.cs \
 	PhotoChanges.cs \
 	PhotosChanges.cs \
+	PhotoSelection.cs \
 	Roll.cs \
 	Defines.cs
 
diff --git a/src/Core/PhotoSelection.cs b/src/Core/PhotoSelection.cs
new file mode 100644
index 0000000..457d61a
--- /dev/null
+++ b/src/Core/PhotoSelection.cs
@@ -0,0 +1,157 @@
+//
+// PhotoSelection.cs
+//
+// Author:
+//   Mike Gemuende <mike gemuende de>
+//
+// Copyright (c) 2010 Mike Gemuende <mike gemuende de>
+//
+// This is free software. See COPYING for details.
+//
+
+using System;
+using System.Collections.Generic;
+
+using Hyena.Collections;
+
+namespace FSpot.Collections
+{
+
+
+    public class PhotoSelection : Selection
+    {
+#region Private Fields
+
+        //private IPhotoListModel model;
+        private IBrowsableCollection model;
+
+#endregion
+
+#region Constructors
+
+        public PhotoSelection (/*IPhotoListModel*/ IBrowsableCollection model)
+        {
+            if (model == null)
+                throw new ArgumentNullException ("model");
+
+            this.model = model;
+        }
+
+#endregion
+
+#region Public Interface
+
+        public IBrowsableItem FirstPhoto {
+            get {
+                if (FirstIndex == -1)
+                    return null;
+
+                return model [FirstIndex];
+            }
+        }
+
+        public IBrowsableItem LastPhoto {
+            get {
+                if (LastIndex == -1)
+                    return null;
+
+                return model [LastIndex];
+            }
+        }
+
+        public void Select (IBrowsableItem photo)
+        {
+            int index = model.IndexOf (photo);
+
+            if (index == -1)
+                throw new ArgumentException ("photo not contained in collection");
+
+            Select (index);
+        }
+
+        public void QuietSelect (IBrowsableItem photo)
+        {
+            int index = model.IndexOf (photo);
+
+            if (index == -1)
+                throw new ArgumentException ("photo not contained in collection");
+
+
+            QuietSelect (index);
+        }
+
+        public void Unselect (IBrowsableItem photo)
+        {
+            int index = model.IndexOf (photo);
+
+            if (index == -1)
+                throw new ArgumentException ("photo not contained in collection");
+
+
+            Unselect (index);
+        }
+
+        public void QuietUnselect (IBrowsableItem photo)
+        {
+            int index = model.IndexOf (photo);
+
+            if (index == -1)
+                throw new ArgumentException ("photo not contained in collection");
+
+
+            QuietUnselect (index);
+        }
+
+        public bool Contains (IBrowsableItem photo)
+        {
+            return Contains (model.IndexOf (photo));
+        }
+
+        public IBrowsableItem FocussedPhoto {
+            get {
+                if (FocusedIndex < 0)
+                    return null;
+
+                return model [FocusedIndex];
+            }
+            set {
+                if (value == null) {
+                    FocusedIndex = -1;
+                    return;
+                }
+
+                int index = model.IndexOf (value);
+
+                if (index == -1)
+                    throw new ArgumentException ("photo not contained in collection");
+
+                FocusedIndex = index;
+            }
+        }
+
+        public void QuietToggleSelect (int index)
+        {
+            if (! RangeCollection.Remove (index)) {
+                RangeCollection.Add (index);
+            }
+        }
+
+        public virtual void ToggleAll ()
+        {
+            for (int i = 0; i <= MaxIndex; i++)
+                QuietToggleSelect (i);
+
+            OnChanged ();
+        }
+
+        public IEnumerable<IBrowsableItem> Photos {
+            get {
+                foreach (int index in this) {
+                    yield return model [index];
+                }
+            }
+        }
+
+#endregion
+    }
+}