/*

* Copyright (c) 2010 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 CXUIAPPLICATIONSTATE_H

#define CXUIAPPLICATIONSTATE_H

#include <QObject>

#include "cxeerror.h"

#include "cxuiapplicationframeworkmonitor.h"

class CxuiApplication;

class CxuiCaptureKeyHandler;

class CxeSettings;

class CxuiDocumentLoader;

class CxuiErrorManager;

class CxuiEventLog;

/*!

* @brief Class maintaining application overall state.

*/

class CxuiApplicationState : public QObject

{

    Q_OBJECT

    Q_ENUMS(State)

public:

    enum State {

        Normal,

        Standby,

        Error,

        Background

    };

    CxuiApplicationState(CxuiApplication &application,

                         CxeSettings &settings,

                         CxuiDocumentLoader *documentLoader);

    ~CxuiApplicationState();

public:

    State currentState() const;

signals:

    void stateChanged(CxuiApplicationState::State newState,

                      CxuiApplicationState::State oldState);

public slots:

    void startMonitoring();

    void handleApplicationError(CxeError::Id error);

    void enterStandby();

    void exitStandby();

private slots:

    void handleForegroundStateChanged(CxuiApplicationFrameworkMonitor::ForegroundState state);

    void handleUsbMassMemoryModeChanged(bool active);

    void handleBatteryEmpty();

    void handleSevereError();

    void handleErrorCleared();

private:

    void setState(State newState);

    void checkErrors();

private:

    State mState;

    CxuiApplicationFrameworkMonitor *mApplicationMonitor;

    CxuiErrorManager *mErrorManager;

    CxuiEventLog *mEventLog;

};

#endif // CXUIAPPLICATIONSTATE_H