--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiaccelerator_plat/alf_visual_api/inc/alf/alfviewportlayout.h	Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,156 @@
+/*
+* Copyright (c) 2007 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:   Viewport layout definition.
+*
+*/
+
+
+
+#ifndef C_ALFVIEWPORTLAYOUT_H
+#define C_ALFVIEWPORTLAYOUT_H
+
+#include <alf/alflayout.h>
+
+/**
+ *  Viewport layout
+ *  Usage:
+ *  @code
+ *  // Aim is to zoom into one of the grids of icons using a viewport layout.
+ *
+ *  // Create a anchor layout and grid layout into the parent anchor layout and 
+ *  // populate it with application icons.
+ * 
+ *  // The viewport layout sits in the middle of the screen.
+ *   parent->SetRelativeAnchorRect(1, EAlfAnchorOriginHCenter, EAlfAnchorOriginVCenter, TAlfRealPoint(-0.2, -0.2),
+ *                                    EAlfAnchorOriginHCenter, EAlfAnchorOriginVCenter, TAlfRealPoint(0.2, 0.2));
+ *   
+ *   // Create the viewport.
+ *   CAlfViewportLayout* viewport = CAlfViewportLayout::AddNewL(*this, parent);
+ * 
+ *  // Set our virtual coordinate system to be based on the number of items in the grid (KNumGridItems).
+ *   viewport->SetVirtualSize(TAlfRealSize(KNumGridItems, 1.0), 0);
+ *   
+ *   // Set the size and position of the viewport to look at the middle icon in the list.
+ *   viewport->SetViewportSize(TAlfRealSize(2, 1.0/6.0), 0);
+ *   viewport->SetViewportPos(TAlfRealPoint(TReal32(KNumGridItems/2)-1.0f, 5.0/12.0), 0);
+ *   
+ *   // This anchor layout will contain a strip of large icons clipped by the viewport window.
+ *   CAlfAnchorLayout* zoomedParent = CAlfAnchorLayout::AddNewL(*this, viewport);     
+ *   
+ *  @endcode
+ * 
+ *  @lib alfclient.lib
+ *  @since S60 v3.2
+ */
+class CAlfViewportLayout : public CAlfLayout
+    {
+
+public:
+
+    /**
+     * Two-phased constructor, which attach new object into the control.
+     * @param aOwnerControl Control that owns this new obejct.
+     * @param aParentLayout If given, the new object is set as child.
+     */
+    IMPORT_C static CAlfViewportLayout* AddNewL(CAlfControl& aOwnerControl,
+                                            CAlfLayout* aParentLayout = 0);
+
+    /**
+     * Constructor.
+     */
+    IMPORT_C CAlfViewportLayout();
+
+    /**
+     * Second-phase constructor.
+     */
+    IMPORT_C void ConstructL(CAlfControl& aOwner);
+
+    /**
+     * Virtual destructor.
+     */
+    IMPORT_C ~CAlfViewportLayout();
+
+    /** @beginAPI */
+
+	/**
+	 * Set virtual size of the viewable area.
+	 *
+	 * This is different from the physical size of the viewport -
+	 * it defines the coordinate space that is used for scrolling.
+	 * To use a normalised (u, v) coordinate mapping system, set aSize to (,1.0, 1.0).
+	 *
+	 * @param aSize The bottom-right corner of the child visual, in the units you wish to use for positioning the viewport.
+	 * @param aTransitionTime The time it will take to complete the resizing of the virtual size.
+	 */
+    IMPORT_C void SetVirtualSize(const TAlfRealSize& aSize, TInt aTransitionTime);
+
+	/**
+	 * Set size of the viewport area.
+	 *
+	 * This is the size of the "window" we are using to look at the visual.
+	 *
+	 * @param aSize The size of the viewport in the units defined by SetVirtualSize().
+	 * @param aTransitionTime The time it will take to complete the resizing of the viewport area.
+	 * @see SetVirtualSize, SetViewportPos
+	 */
+    IMPORT_C void SetViewportSize(const TAlfRealSize& aSize, TInt aTransitionTime);
+
+	/**
+	 * Set position of the viewport area.
+	 *
+	 * This is the offset of the "window" we are using to look at the visual.
+	 *
+	 * @param aSize The size of the viewport in the units defined by SetVirtualSize().
+	 * @param aTransitionTime The time it will take to complete moving the viewport area.
+	 * @see SetVirtualSize, SetViewportSize
+	 */
+    IMPORT_C void SetViewportPos(const TAlfRealPoint& aPos, TInt aTransitionTime);
+
+    /** @endAPI */
+
+    /**
+     * From CAlfVisual
+     * @see CAlfVisual
+     */
+    IMPORT_C void RemoveAndDestroyAllD();
+    IMPORT_C void UpdateChildrenLayout(TInt aTransitionTime = 0);
+    IMPORT_C CAlfVisual* FindTag(const TDesC8& aTag);
+    
+    /** 
+     * From CAlfLayout
+     * @see CAlfLayout
+     */
+    IMPORT_C TAlfXYMetric BaseUnit() const; 
+
+
+protected:
+    /**
+     * From CAlfVisual
+     * @see CAlfVisual
+     */
+    IMPORT_C void DoRemoveAndDestroyAllD();
+    IMPORT_C void PropertyOwnerExtension(const TUid& aExtensionUid, TAny** aExtensionParams);
+
+
+private:
+
+    // Private data structure. Owned.
+    struct TViewportLayoutPrivateData;
+    TViewportLayoutPrivateData* iViewportLayoutData;
+
+    };
+
+
+
+#endif // C_ALFVIEWPORTLAYOUT_H