--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browsercore/appfw/Common/FlowInterface.h	Tue May 04 12:39:35 2010 +0300
@@ -0,0 +1,126 @@
+/*
+* Copyright (c) 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: 
+*
+*/
+
+
+
+#ifndef __FLOWBASE_H__
+#define __FLOWBASE_H__
+
+#include <QImage>
+#include <QWidget>
+#include <QGraphicsWidget>
+#include <QGraphicsItem>
+
+class QPainter;
+
+namespace WRT {
+    /*!
+     * \class FlowInterface
+     *
+     * \brief This file describes the common interface of the various history view engines
+     * i.e., PictureFlow, VisualFlow
+     *
+     * This class is designed so that the Views using these engines can implement some functionality
+     * in common modules, and assign the specific engine at a higher level
+     */
+    class FlowInterfaceBase
+    {
+    public:
+        //! Perform init steps on flow
+        virtual void init() = 0;
+
+        //! Clear all slides
+        virtual void clear() = 0;
+        
+        //! Add a slide to the flow
+        virtual void addSlide(const QImage& image) = 0;
+
+        //! Add a slide to the flow
+        virtual void addSlide(const QImage&, const QString&) {};
+
+        //! Set the center of the flow
+        virtual void setCenterIndex(int i) = 0;
+
+        //! Show the previous item 
+        virtual void showPrevious() = 0;
+
+        //! Show the next item
+        virtual void showNext() = 0;
+
+        //! Returns the total number of slides.
+        virtual int slideCount() const = 0;
+
+        //! Returns QImage of specified slide.
+        virtual QImage slide(int) const = 0;
+
+        //! Return the index of the current center slide
+        virtual int centerIndex() const = 0;
+
+        //! Return true if slide animation is ongoing
+        virtual bool slideAnimationOngoing() const = 0;
+
+        //! Return the central slide's rect
+        virtual QRect centralRect() const = 0;
+
+        //! Insert a slide at index position
+        virtual void insert(int, const QImage&, const QString&) {}
+
+        //! Remove a slide at index position
+        virtual void removeAt(int) {}
+
+        //! handle the display mode change
+        virtual void displayModeChanged(QString&) {}
+
+        //! prepare start-animation
+        virtual void prepareStartAnimation() {}
+
+        //! run start-animation
+        virtual void runStartAnimation() {}
+        
+        //! run end-animation
+        virtual void runEndAnimation() {}
+    };
+
+    class FlowInterface : public QWidget, public FlowInterfaceBase
+    {
+        Q_OBJECT
+    public:
+        //! Init the FlowInterface with a QWidget parent
+        FlowInterface(QWidget* parent) : QWidget(parent) {}
+
+        //! declear common signals
+    signals:
+        void centerIndexChanged(int index);
+        void ok(int index);
+        void cancel();
+    };
+
+    class GraphicsFlowInterface : public QGraphicsWidget, public FlowInterfaceBase
+    {
+        Q_OBJECT
+    public:
+        //! Init the FlowInterface with a QWidget parent
+        GraphicsFlowInterface(QGraphicsItem* parent) : QGraphicsWidget(parent) {}
+
+    signals:
+        void centerIndexChanged(int index);
+        void ok(int index);
+        void cancel();
+    };
+}
+
+#endif      // __FLOWBASE_H__