--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiaccelerator_plat/alf_core_toolkit_api/inc/uiacceltk/huiviewportlayout.h	Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,174 @@
+/*
+* 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 visual.
+*
+*/
+
+
+
+#ifndef C_HUIVIEWPORTLAYOUT_H
+#define C_HUIVIEWPORTLAYOUT_H
+
+#include <e32base.h>
+#include <uiacceltk/HuiLayout.h>
+
+/* Forward declarations */
+class CHuiEnv;
+
+
+/**
+ * A CHuiViewportLayout is similar to a CHuiDeckLayout, but it can contain
+ * visuals larger than itself. The larger visuals can be scrolled around.
+ *
+ * The viewport visual can be thought of as providing a "window" onto a larger visual.
+ * Different parts of the visual can be viewed by moving the viewport. By default, the
+ * clipping region is enabled.
+ *
+ * To use the viewport visual, you first need to call SetVirtualSize() to define the
+ * coordinate system for the visual. You pass in the work area of the visual, in whatever
+ * units you choose. For example, if you set the virtual work area size to (1.0, 1.0), it
+ * will use a normalised (u, v) coordinate mapping system.
+ *
+ * Next, you can set the dimensions and position of the viewport (or "window") using SetViewportSize()
+ * and SetViewportPos(). This viewport can be moved around the virtual work area. The contents of the
+ * viewport will be fitted to the ViewportVisual.
+ *
+ * Possible uses for CHuiViewportVisual are for text marquee scrolling effects and photo zooming.
+ *
+ * @todo - insert diagram here.
+ * @see CHuiDeckLayout
+ *
+ */
+
+NONSHARABLE_CLASS(CHuiViewportLayout) : public CHuiLayout
+	{
+public:	
+
+    /** @beginAPI */
+    
+    // Bitfield of binary flags.
+	enum TFlags
+		{
+		/** Wrap contents of visual horizontally. */
+		EWrapHorizontal = 0x0001,
+		
+		/** Wrap contents of visual vertically. */
+		EWrapVertical = 0x0002
+		};
+	
+    /* Constructors and destructor. */
+
+    /**
+     * Construct a new viewport layout and give its ownership to a control.
+     *
+     * @param aOwnerControl  Owner control.
+     * @param aParentLayout  Parent layout for the new deck layout.
+     */
+    IMPORT_C static CHuiViewportLayout* AddNewL(CHuiControl& aOwnerControl, 
+                                                CHuiLayout* aParentLayout = 0);
+
+    /** @endAPI */
+
+public:
+
+    /**
+     * Constructor.
+     *
+     * @param aOwner  Owner control.
+     */
+    CHuiViewportLayout(MHuiVisualOwner& aOwner);    // Made public for unit tests.
+
+    void ConstructL();  // Made public for unit tests.
+
+    ~CHuiViewportLayout();  // Made public for unit tests.
+
+public:
+
+    /** @beginAPI */
+
+    /* Methods. */
+
+	/**
+	 * 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 THuiRealSize& aSize, TInt aTransitionTime=0);
+
+	/**
+	 * 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 THuiRealSize& aSize, TInt aTransitionTime=0);
+
+	/**
+	 * 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 THuiRealPoint& aSize, TInt aTransitionTime=0);
+
+    /** @endAPI */
+
+    /**
+     * Overridden version of size changing updates the layout of child visuals.
+     *
+     * @param aSize  New size for the layout.
+     * @param aTransitionTime  Time for the transition to new size to take 
+     *                          place.
+     */
+    void SetSize(const THuiRealSize& aSize, TInt aTransitionTime=0);
+
+    TBool ChildSize(TInt aOrdinal, TSize& aSize);
+    
+    TBool ChildPos(TInt aOrdinal, TPoint& aPos);
+
+    TInt ChildRect(TInt aOrdinal, THuiRealRect& aRect);
+    	
+    void GetClassName(TDes& aName) const
+        {
+        aName = _L("CViewportLayout");
+        }
+        
+private: 
+
+    /** The bottom-right corner of the child visual, in the units defined by SetVirtualSize. */
+    THuiRealSize iVirtualSize;
+    
+    /** The top-left corner of the viewport window, relative to te position defined by iVirtualSize. */
+    THuiRealPoint iViewportPos;
+    
+    /** The size of the viewport window, relative to te position defined by iVirtualSize. */
+    THuiRealSize iViewportSize;
+    
+    /** Bitfield of flags to change the way the vieport is rendered. */
+    TInt iWrappingFlags;
+
+	};
+
+#endif // C_HUIVIEWPORTLAYOUT_H