--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/layouts/inc/glxlayout.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,181 @@
+/*
+* 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 base classes
+*
+*/
+
+
+
+
+#ifndef __GLXLAYOUT_H__
+#define __GLXLAYOUT_H__
+
+#include <e32base.h>
+#include <glxlayoutinfo.h>
+
+/**
+ * MGlxLayout
+ *  
+ * Layout base class. Layouts are objects that specify the 
+ * renderable values, such as position, size or opacity for the visuals
+ * They can be chained to form processing chains, and the chains
+ * can also split into several chains (different chain for different 
+ * visuals) and combine several chains into one. This allows building
+ * complex visual effects by using simple layouts as building blocks.
+ */
+class MGlxLayout 
+	{
+	protected:
+	
+		/**
+		 * Destructor. Dont allow deletion through this interface.
+		 */
+		~MGlxLayout() { }
+
+	public:
+
+		/**
+		 * This method can specify the layout of given visual by setting 
+		 * the corresponding fields in the layout info struct.
+		 * @param aInfo the layout information to specify
+		 */
+		virtual void SetLayoutValues( TGlxLayoutInfo& aInfo ) = 0;
+
+		/**
+		 * Sets the next layout in the chain.
+		 */
+		virtual void SetNext( MGlxLayout* aLayout ) = 0;
+
+		/**
+		 * Returns the next layout in the chain.
+		 */
+		virtual MGlxLayout* Next() const = 0;
+
+	};
+	
+/**
+ * TGlxLayout
+ *  
+ * Implements the MGlxLayout interface and provides common layout chain functionality.
+ *
+ * @lib glxlayouts.lib
+ */
+class TGlxLayout : public MGlxLayout
+	{
+	public:
+
+		/**
+		 * Constructor, resets the object.
+		 */
+		IMPORT_C TGlxLayout();
+
+		/**
+		 * Destructor.
+		 */
+		IMPORT_C virtual ~TGlxLayout();
+
+		/**
+		 * Sets the next layout in the chain.
+		 */
+		IMPORT_C void SetNext( MGlxLayout* aLayout );
+
+		/**
+		 * Returns the next layout in the chain.
+		 */
+		IMPORT_C MGlxLayout* Next() const;
+
+	public: 	// From MGlxLayout
+
+		/// @ref MGlxLayout::SetLayoutValues
+		IMPORT_C void SetLayoutValues( TGlxLayoutInfo& aInfo );
+
+	protected:	// New API, template method pattern
+	
+		/**
+		 * This method can specify the layout of given visual by setting the corresponding fields
+		 * in the layout info struct.
+		 * @param aInfo the layout information to specify
+		 */
+		virtual void DoSetLayoutValues( TGlxLayoutInfo& aInfo );
+
+	private:
+
+		/// Ref: The next layout in chain
+		MGlxLayout* iNextLayout;
+	
+	public:
+	
+		__DEBUG_ONLY( TBuf<50> _iName ); 
+
+	};
+
+/**
+ * CGlxLayout
+ *  
+ * Implements the MGlxLayout interface and provides common layout chain functionality.
+ * This class is provided as a base class for CBase deriving layout classes.
+ *
+ * @lib glxlayouts.lib
+ */
+class CGlxLayout : public CBase, public MGlxLayout
+	{
+	public:
+
+		/**
+		 * Constructor, resets the object.
+		 */
+		IMPORT_C CGlxLayout();
+
+		/**
+		 * Destructor. Virtual by CBase and MGlxLayout
+		 */
+		IMPORT_C ~CGlxLayout();
+
+		/**
+		 * Sets the next layout in the chain.
+		 */
+		IMPORT_C void SetNext( MGlxLayout* aLayout );
+
+		/**
+		 * Returns the next layout in the chain.
+		 */
+		IMPORT_C MGlxLayout* Next() const;
+
+	public: 	// From MGlxLayout
+
+		/// @ref MGlxLayout::SetLayoutValues
+		IMPORT_C void SetLayoutValues( TGlxLayoutInfo& aInfo );
+
+	protected:	// New API, template method pattern
+	
+		/**
+		 * This method can specify the layout of given visual by setting the corresponding fields
+		 * in the layout info struct.
+		 * @param aInfo the layout information to specify
+		 */
+		virtual void DoSetLayoutValues( TGlxLayoutInfo& aInfo );
+
+	private:
+
+		/// Own: the layout implementation
+		TGlxLayout iLayoutImpl;
+	
+	public:
+	
+		__DEBUG_ONLY( TBuf<50> _iName ); 
+
+	};
+	
+#endif // __GLXLAYOUT_H__
+