--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/layouts/src/glxfollowfocuslayout.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,90 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    Layout mapping index to distance from focus
+*
+*/
+
+
+
+
+#include "glxfollowfocuslayout.h" 
+
+#include <mglxvisuallist.h>	// MGlxVisualList
+#include "glxpanic.h" // Panic codes
+#include <mglxanimation.h>
+
+// -----------------------------------------------------------------------------
+// Constructor
+// -----------------------------------------------------------------------------
+EXPORT_C TGlxFollowFocusLayout::TGlxFollowFocusLayout()
+	: iVisualList( NULL )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+EXPORT_C TGlxFollowFocusLayout::~TGlxFollowFocusLayout() 
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// SetVisualListL
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void TGlxFollowFocusLayout::SetVisualListL(
+	MGlxVisualList* aVisualList )
+    {
+    __ASSERT_DEBUG( aVisualList, Panic( EGlxPanicNullVisualList ) );
+
+    iVisualList = aVisualList;
+    }
+
+// -----------------------------------------------------------------------------
+// DoSetLayoutValues
+// -----------------------------------------------------------------------------
+void TGlxFollowFocusLayout::DoSetLayoutValues( TGlxLayoutInfo& aInfo )
+    {
+    __ASSERT_DEBUG( iVisualList, Panic( EGlxPanicNullVisualList ) );
+
+    // change the mappedindex to be relative to focus but wrapped around
+    // so if the list items are
+    //  0, 1, 2, 3, 4, 5, 6
+    // -2,-1, 0, 1, 2, 3,-3 == focus in 2
+    // -3,-2,-1, 0, 1, 2, 3 == focus in 3
+    //  1, 2, 3,-3,-2,-1, 0 == focus in 6
+    //  0, 1, 2, 3,-3,-2,-1 == focus in 0
+
+    // calculate the current index - focus
+    TInt index = aInfo.Index() - iVisualList->FocusIndex();
+    
+    // get item count
+    TInt itemCount = iVisualList->ItemCount();
+    TInt maxDist = itemCount / 2;
+
+    // if index is smaller than smallest possible
+    if ( index < -maxDist )
+        {
+        // wrap around
+        index += itemCount;
+        }
+    // if index is larger than biggest possible
+    else if ( index >= maxDist )
+        {
+        // wrap around
+        index -= itemCount;
+        }
+    // assign the mapped index
+    aInfo.iMappedIndex = index;
+    }