/*

* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  Represents the History View

*

*/

#ifndef HISTORYVIEW_H

#define HISTORYVIEW_H

//  INCLUDES

#include <e32base.h>

#include <bitdev.h>

#include <coecntrl.h>

enum THistoryViewComponent

    {

    EHistoryComponentNone,

    EHistoryComponentLeftArrow,

    EHistoryComponentRightArrow,

    EHistoryComponentLeftPlaceHolder,

    EHistoryComponentMiddlePlaceHolder,

    EHistoryComponentRightPlaceHolder

    };

// CONSTANTS

const int KCenterThumbnailWidthPercent = 50;

const int KCenterThumbnailHeightPercent = 90;

const int KSideThumbnailWidthPercent = 25;

const int KSideThumbnailHeightPercent = 70;

// FORWARD DECLARATIONS

class HistoryController;

class HistoryEntry;

class WebSurface;

// CLASS DECLARATION

/**

*  Displays the Graphival History List

*

*  @lib browserview.lib

*  @since Series 60 3.0

*/

class HistoryView : public CCoeControl

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static HistoryView* NewL( HistoryController& historyController, bool previous);

        /**

        * Destructor.

        */

        virtual ~HistoryView();

    public: // New functions

       /**

        *

        * Pass key events to the Browser Control

        * @since 3.0

        * @param aKeyEvent The key event

        * @param aType The key code

        * @return If the Browser Control consumed the key event or not

        */

        TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent, TEventCode aEventCode);

        /**

        * Draws the offscreen bitmap to the screen

        * @since 3.0

        * @param aGc System graphics context

        * @param aRect rectangle to be drawn

        * @return void

        */

        virtual void Draw( const TRect& aRect ) const;

        /**

        * GetCenterEntryTitle

        *

        * @since 3.x

        * @return page title of center entry

        */

        TPtrC getCenterEntryTitle();

        /**

        * CalcRepaintRect

        * Method to do transtion effect when the history view is launched

        * @since 3.x

        * @return ETrue when animation is continuing and EFalse when animation completes

        */

        bool calcRepaintRect();

        /**

        * AnimatePlaceHolderPosition

        * Method to do transtion effect when user navigates in the history view

        * @since 3.x

        * @return ETrue when animation is continuing and EFalse when animation completes

        */

        bool animatePlaceHolderPosition();

        /**

        * AnimatePlaceHolderPosition

        * Method to do transtion effect when user navigates in the history view

        * @since 3.x

        * @return ETrue when animation is continuing and EFalse when animation completes

        */

        int historyLoadOffset() { return ( m_centerPageIndex-m_historyStackIndex ); }

        /**

        * HandlePointerEventL

        * From CCoeControl

        *

        */

        virtual void HandlePointerEventL(const TPointerEvent& aPointerEvent);

        /**

        * AutoScroll

        * Called v=by timer callback when user presses an arrow and does not let go

        * @since 3.2

        * @param

        * @return

        */

        void autoScroll();

        /**

        * Perform transition

        * Method to do layout of the history view place holders

        * @since 3.x

        * @return void

        */

        void performTransition(int dir);

        void updateState(int dir);

    private:

        /**

        * Constructor

        * @since 3.x

        * @param aWebKitControl

        * @param aRect

        * @param aMode display mode

        */

        HistoryView( HistoryController& aHistoryController, bool aPrevious );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL( );

        /**

        * Updates the offscreen bitmap with the thumbnails to be drawn

        * @since 3.x

        * @return void

        */

        void updateDisplay();

        /**

        * Creates offscreen bitmap

        * @since 3.x

        * @return void

        */

        void updateOffscreenBitmapL( );

        /**

        *   From CCoeControl, CountComponentControls

        */

        int CountComponentControls() const {return 0;}

        /**

        *   From CCoeControl, SizeChanged

        */

        virtual void SizeChanged();

        /**

        *   From CCoeControl, ComponentControl

        */

        CCoeControl* ComponentControl(int /*aIndex*/) const { return NULL;}

        /**

        * CalculateLayout

        * Method to do layout of the history view place holders

        * @since 3.x

        * @return void

        */

        void calculateLayout();

        /**

        * LoadUrl

        * Method to load an url

        * @since 3.x

        * @return void

        */

        void loadUrl();

    private:    // Data

        CFbsBitmapDevice*        m_bitmapDevice;     // owned

        WebSurface*              m_renderTarget;        // no owned

        CFbsBitGc*               m_bitmapContext; // owned

        HistoryController*       m_historyController;// not owned

        // indicates the index of the center thumbnail

        int                      m_centerPageIndex;

        TRect                    m_offscreenRect;

        // represents the entry corresponding to the selected page in view

        HistoryEntry*            m_centerEntry; // not owned

        // timer used to do animation

        CIdle*                   m_repaintTimer;

        //repaint rect using during animating initial display of history view

        TRect                    m_repaintRect;

        //resize factor applied during initial display animation

        int                      m_resizeFactor;

        //left place holder rectangle

        TRect                    m_leftPlaceHolderRect;

        //left place holder rectangle

        TRect                    m_centerPlaceHolderRect;

        //left place holder rectangle

        TRect                    m_rightPlaceHolderRect;

        //Left Arrow position

        TPoint                   m_leftArrow[3];

        //Right arrow position

        TPoint                   m_rightArrow[3];

        //Factor used during animation of place holders

        int                      m_placeHolderResizeFactor;

        //Direction of movement

        int                      m_direction;

        //Flag to check if fast animation is needed or not

        bool                     m_fastScroll;

        // Initial position of History Stack

        int                      m_historyStackIndex;

        // Save the last pointer event

        TPointerEvent            m_pointerEvent;

        // Component selected by MouseDown event

        THistoryViewComponent    m_historyViewComponent;

        // Timer for repeated scrolling

        CPeriodic*               m_autoScrollPeriodic;

        TPoint m_lastpointerposition;

    };

#endif      // HISTORYVIEW_H

// End of File