--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/layouts/src/glxlayoutsplitter.cpp	Wed Sep 01 12:33:26 2010 +0100
@@ -0,0 +1,226 @@
+/*
+* 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:    Splits layout chain by visual
+*
+*/
+
+
+
+
+#include "glxlayoutsplitter.h"
+
+#include <alf/alfvisual.h>
+#include <mglxvisuallist.h>
+#include <glxpanic.h> // Panic codes
+
+// -----------------------------------------------------------------------------
+// Constructor
+// -----------------------------------------------------------------------------
+EXPORT_C TGlxLayoutSplitter::TGlxLayoutSplitter() 
+	: iDefaultLayout( NULL ),
+	iVisualList( NULL )
+	{
+	__DEBUG_ONLY( _iName = _L("TGlxLayoutSplitter") );
+	}
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+EXPORT_C TGlxLayoutSplitter::~TGlxLayoutSplitter()
+	{
+	Reset();
+	}
+
+// -----------------------------------------------------------------------------
+// Tells the splitter what is the visual list object
+// -----------------------------------------------------------------------------
+EXPORT_C void TGlxLayoutSplitter::SetVisualListL(
+	MGlxVisualList* aVisualList )
+	{
+	__ASSERT_DEBUG( 
+		aVisualList, Panic( EGlxPanicNullVisualList ) );
+	iVisualList = aVisualList;
+	iVisualList->AddObserverL( this );
+	}
+
+// -----------------------------------------------------------------------------
+// SetLayoutL
+// -----------------------------------------------------------------------------
+EXPORT_C void TGlxLayoutSplitter::SetLayoutL(
+	MGlxLayout* aLayout, const CAlfVisual* aVisual )
+	{
+	// Call SetVisualListL first
+	__ASSERT_DEBUG( iVisualList, Panic( EGlxPanicNullVisualList ) ); 
+	// search if there already is a layout for this visual
+	__DEBUG_ONLY( TLayout temp;temp.iVisual = aVisual; );
+	__ASSERT_DEBUG( 
+		iLayouts.Find( temp, TLayout::Match ) == KErrNotFound, 
+		Panic( EGlxPanicAlreadyAdded ) );
+	
+	// create layout struct
+	TLayout newLayoutStruct;
+	newLayoutStruct.iLayout = aLayout;
+	newLayoutStruct.iVisual = aVisual;
+	// append to the array
+	iLayouts.AppendL( newLayoutStruct );
+	}
+	
+// -----------------------------------------------------------------------------
+// Removes an existing layout 
+// -----------------------------------------------------------------------------
+EXPORT_C void TGlxLayoutSplitter::RemoveLayout(
+	const CAlfVisual* aVisual )
+	{
+	TInt index = LayoutIndex( aVisual );
+	if( index != KErrNotFound )
+		{
+		iLayouts.Remove( index );
+		}
+	// NOTE: it is ok to try to remove a layout from visual when there was none
+	}
+	
+// -----------------------------------------------------------------------------
+// Sets layout to be used when for visuals which don't have a specific layout
+// -----------------------------------------------------------------------------
+EXPORT_C void TGlxLayoutSplitter::SetDefaultLayout(
+	MGlxLayout* aLayout )
+	{
+	iDefaultLayout = aLayout;
+	}
+
+// -----------------------------------------------------------------------------
+// Reset
+// Remove all layouts and remove association with visual list.
+// -----------------------------------------------------------------------------
+EXPORT_C void TGlxLayoutSplitter::Reset()
+    {
+    // Remove all layouts
+    iLayouts.Close();
+
+    if( iVisualList )
+        {
+        iVisualList->RemoveObserver( this );
+        iVisualList = NULL;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// DoSetLayoutValues
+// -----------------------------------------------------------------------------
+void TGlxLayoutSplitter::DoSetLayoutValues(
+	TGlxLayoutInfo& aInfo )
+	{
+	// Call SetVisualListL to avoid this assert
+	__ASSERT_DEBUG( iVisualList, Panic( EGlxPanicNullVisualList ) ); 
+
+	// Does a layout exist for the visual
+	// If yes, use the specific layout. If not, use default layout.
+	MGlxLayout* layout = Layout( &aInfo.Visual() );
+	// if layout was found
+	if( layout )
+		{
+		// return its value
+		return layout->SetLayoutValues( aInfo );
+		}
+	// otherwise return the default layout value
+	else if( iDefaultLayout )
+		{
+		return iDefaultLayout->SetLayoutValues( aInfo );
+		}
+	// nothing to do, no layout for the visual nor default
+	}
+
+// -----------------------------------------------------------------------------
+// HandleVisualAddedL
+// -----------------------------------------------------------------------------
+void TGlxLayoutSplitter::HandleVisualAddedL(
+	CAlfVisual* /*aVisual*/, TInt /*aIndex*/, MGlxVisualList* /*aList*/)
+	{
+	// Do nothing
+	}
+
+// -----------------------------------------------------------------------------
+// HandleVisualRemoved
+// Remove the layout associated with the visual, if any.
+// -----------------------------------------------------------------------------
+void TGlxLayoutSplitter::HandleVisualRemoved(
+	const CAlfVisual* aVisual, MGlxVisualList* /*aList*/ )
+	{
+	// Try to find a layout struct with the provided visual, and remove
+	// it if found
+	TInt index = LayoutIndex( aVisual );
+	if( index != KErrNotFound )
+		{
+		iLayouts.Remove( index );
+		}
+	}
+
+// -----------------------------------------------------------------------------
+// HandleFocusChangedL
+// -----------------------------------------------------------------------------
+void TGlxLayoutSplitter::HandleFocusChangedL(
+	TInt /*aFocusIndex*/, 
+	TReal32 /*aItemsPerSecond*/, 
+	MGlxVisualList* /*aList*/,
+	NGlxListDefs::TFocusChangeType /*aType*/ )
+	{
+	// Do nothing
+	}
+	
+// -----------------------------------------------------------------------------
+// HandleSizeChanged
+// -----------------------------------------------------------------------------
+void TGlxLayoutSplitter::HandleSizeChanged(
+	const TSize& /*aSize*/, MGlxVisualList* /*aList*/ )
+	{
+	// Do nothing
+	}
+
+// -----------------------------------------------------------------------------
+// Returns the layout associated with the aInIndex, or NULL if not found
+// -----------------------------------------------------------------------------
+MGlxLayout* TGlxLayoutSplitter::Layout(
+	const CAlfVisual* aVisual ) const
+	{
+	// Find the layout that is intended for this visual
+	TInt index = LayoutIndex( aVisual );
+	if( index != KErrNotFound )
+		{
+		return iLayouts[ index ].iLayout;
+		}
+	return NULL;
+	}
+
+// -----------------------------------------------------------------------------
+// Returns layout struct index or KErrNotFound
+// -----------------------------------------------------------------------------
+TInt TGlxLayoutSplitter::LayoutIndex(
+	const CAlfVisual* aVisual ) const  
+	{
+	// search if there already is a layout for this visual
+	TLayout temp;
+	temp.iVisual = aVisual;
+	return iLayouts.Find( temp, TLayout::Match );
+	}
+
+// -----------------------------------------------------------------------------
+// TGlxLayoutSplitter::Match
+// -----------------------------------------------------------------------------
+TBool TGlxLayoutSplitter::TLayout::Match( 
+	const TLayout& aLhs, const TLayout& aRhs )
+	{
+	// return true if the visuals are same
+	return aLhs.iVisual == aRhs.iVisual;
+	}
+