/*

* 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 __TNENGINEHANDLER_H__

#define __TNENGINEHANDLER_H__

#include <QTimer>

#include <QPainter>

namespace WRT {

    class TnEngineGenerator;

    class TnEngineView;

    class WrtBrowserContainer;

    class WrtPageManager;

    class TnEngineHandler : public QObject

    {

        Q_OBJECT

    public:

        ~TnEngineHandler();

        TnEngineHandler(WrtPageManager * mgr, QWidget * parent);

    public:

        void setVisible(bool visible);

        bool isVisible() const { return m_visible; }

        void setZoomOutLevel(int percent) { m_zoomOutLevel = percent; }

        int zoomOutLevel() const { return m_zoomOutLevel; }

        QRect theRect() const;

        QRect indicatorRect() const;

        TnEngineView* tnEngineView() { return m_TnEngineView; }

        void drawDocumentPart(QPainter& painter, const QRect& documentAreaToDraw);

        QRect documentViewport() const;

        void scaledPageChanged(const QRect& area, bool fullScreen, bool scroll);

        QSize documentSize() const;

    public slots:

        void documentStarted();

        void documentChanged();

        void documentCompleted(bool);

        void documentViewportMoved();

    public:

        QRect TnEngineRect() const;

        void draw(QPainter& gc, const QRect& rect) const;

        QRect containerRect() const;

        void setContainerRect(const QRect& rect);

        bool isFullScreenMode() const;

        void setFullScreenMode(bool fullScreenMode);

        void updateNow();

        QRect viewportOnDocument() const;

    public slots:

        void updateCbTimerCb();

        void updateTimerCb();

        void scrollBy(int x, int y);

        void draggingStarted();

        void draggingEnded();

    signals:

        void ok(int x, int y);

    private slots:

        void okInvoked();

    private:

        friend class TnEngineGenerator;

        void createGenerator();

        void destroyGenerator();

        void createView();

        void destroyView();

        QRect fromDocCoords(const QRect& from) const;

        QPoint fromDocCoords(const QPoint& from) const;

        QSize fromDocCoords(const QSize& from) const;

        QRect toDocCoords(const QRect& from) const;

        QPoint toDocCoords(const QPoint& from) const;

        QSize toDocCoords(const QSize& from) const;

        bool checkAndCreateBitmap(QSize size, QPixmap*& image);

        QSize calcSize() const;

        QRect calcViewportOnDocument() const;

        void documentChangedCb();

        void scrollTimerCb();

        void visibilityTimerCb();

        QRect viewportOnTnEngine() const;

        void activate();

        void deactivate();

    public:

        QWidget* widget();

        bool isDocumentComplete() const { return m_documentComplete; }

    private:

        // Page Manager

        WrtPageManager * m_pageMgr;

        // generator

        TnEngineGenerator* m_generator;

        // zoom level of the TnEngine in percent

        int m_zoomOutLevel;

        QRect m_viewportOnDocument;

        bool m_needsUpdate;

        QTimer* m_updateTimer;

        QTimer* m_updateCbTimer;

        bool m_documentComplete;

        QRect m_containerRect;

        bool m_fullScreenMode;

        bool m_visible;

        bool m_pageScalerUpdating;

        WrtBrowserContainer* m_activePage;

        QPoint m_savedPointPageView;

        TnEngineView* m_TnEngineView;

        qreal m_scrollX;

        qreal m_scrollY;

        bool m_dragging;

        QWidget * m_parentWidget;

    };

}

#endif

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