--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/engine/effectsrc/shwzoomandpanlayout.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,175 @@
+/*
+* Copyright (c) 2007-2008 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 that performs zoom and fade
+ *
+*/
+
+
+
+
+#ifndef __SHWZOOMANDPANLAYOUT_H__
+#define __SHWZOOMANDPANLAYOUT_H__
+
+#include <glxlayout.h>
+//#include <alf/alfrealsize.h>
+#include <alf/alftimedvalue.h>
+#include <alf/alfcurvepath.h>
+
+#include "shwtimedvalue.h"
+
+// FORWARD DECLARATIONS
+class CHuiCurvePath;
+
+/**
+ * TShwZoomAndPanLayout
+ * Handles zooming and panning a visual
+ * 
+ * @author Kimmo Hoikka
+ * @lib shwslideshowengine.lib
+ * @internal reviewed 07/06/2007 by Loughlin
+ * @internal reviewed 06/06/2007 by Dan Rhodes
+ */
+NONSHARABLE_CLASS( TShwZoomAndPanLayout ) : public TGlxLayout
+	{
+	public:
+
+		/**
+		 * Enumeration for zoom direction.
+		 */
+		enum TZoomDirection
+			{
+			EZoomIn = 1,	// Zoom in, from minimum to maximum size
+			EZoomOut = 2	// Zoom out, from maximum to minimum size
+			};
+
+		/**
+		 * Constructor, initializes the layout.
+		 */
+		TShwZoomAndPanLayout();
+
+		/**
+		 * Destructor
+		 */
+		~TShwZoomAndPanLayout();
+
+		/**
+		 * Sets the screen and image size
+		 * @param aScreenSize the size of the screen.
+		 * @param aImageSize the size of the image.
+		 * @param aMaximumSize the maximum ever size for the image
+		 * @return the zoom factor, this enables the client to deside 
+		 *			if it makes sense to do any zoomimg
+		 */
+		TReal32 SetSizes( 
+		    TSize aScreenSize, TSize aImageSize, TSize aMaximumSize );
+
+		/**
+		 * Sets the curve for pan. The curve must be defined so that in
+		 * 100% zoom it stays inside the image (no black borders shown)
+		 * basically this means a box inside image coordinates:
+		 * xi = image.width/2;
+		 * yi = image.height/2;
+		 *
+		 *  (-xi,yi)-------------(xi,yi)
+		 *  |  (-xb,yb)-------(xb,yb)  |
+		 *  |  |                    |  |
+		 *  |  (-xb,-yb)-----(xb,-yb)  |
+		 *  (-xi,-yi)-----------(xi,-yi)
+		 *
+		 * where:
+		 *  xb = xi - screen.width/2;
+		 *  yb = yi - screen.height/2;
+		 *
+		 * During zoom the panning curve is scaled according to current
+		 * zoom factor so that no black borders show in zoom factors < 100%
+		 *
+		 * @param aCurve the curve to use for the panning.
+		 */
+		void SetPanningCurve( CAlfCurvePath* aCurve );
+
+        /**
+         * This method returns the maximum zoom size for the image
+         * Should not be called before before SetSizes is called
+         * @return the maximum size as TSize
+         */
+        TSize MaximumSize();
+
+		/**
+		 * This method resets the size to minimum. Usefull when you dont 
+		 * want to do zoom & pan (for example the image is too small)
+		 */
+		void ResetSizeToMinimum();
+
+		/**
+		 * This method starts the zooming. If a pannig curve is used 
+		 * it should be set before calling this method. Note, for zoom in
+		 * the layout uses the first half of the curve and for zoom out
+		 * the latter half; this enables you to use an ellipsis to have
+		 * looping zoomin
+		 *
+		 * @param aZoomDirection the desired zoom direction
+		 * @param aDuration the length of the zoom loop
+		 */
+		void StartZoom( TZoomDirection aZoomDirection, TInt aDuration );
+
+		/** 
+		 * This method inverts the zoom the opposite way
+		 */
+		TInt InvertZoom();
+
+		/**
+		 * This method pauses zoom and pan
+		 */
+		void Pause();
+
+		/**
+		 * This method resumes zoom and pan after pause.
+		 */
+		void Resume();
+
+	protected:	// From TGlxLayout
+
+		/// @ref TGlxLayout::DoSetLayoutValues
+		void DoSetLayoutValues( TGlxLayoutInfo& aInfo );
+		/// @ref TGlxLayout::DoChanged
+		TBool DoChanged() const;
+		/// @ref TGlxLayout::DoClearChanged
+		void DoClearChanged();
+
+	private:	// Data and private parts
+
+		/// Helper to calculate minimum and maximum size
+		void CalculateMinAndMaxSize( TSize aMaximumSize );
+		/// Own: Screen size
+		TAlfRealSize iScreenSize;
+		/// Own: Image size
+		TAlfRealSize iImageSize;
+		/// Own: the maximum size
+		TAlfRealSize iMaximumSize;
+		/// Own: the minimum size
+		TAlfRealSize iMinimumSize;
+		/// Own: the zoom direction
+		TZoomDirection iZoomDirection;
+		/// Own: the zoom duration
+		TInt iZoomDuration;
+		/// Own: the zoomed size
+		TShwTimedSize iZoomedSize;
+		/// Own: Pan curve position
+		TShwTimedValue iCurvePosition;
+		/// Ref: Pan curve
+		CAlfCurvePath* iPanningCurve;
+
+	};
+
+#endif // __SHWZOOMANDPANLAYOUT_H__