/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not,

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*  This file defines the DeviceDelegate, DeviceImpl and DefaultDeviceImpl classes.

*/

#ifndef DEVICEDELEGATE_H

#define DEVICEDELEGATE_H

#include <QObject>

#include <QString>

#ifdef QT_MOBILITY_SYSINFO

#define DEVICEIMPL SystemDeviceImpl

#else

#define DEVICEIMPL DefaultDeviceImpl

#endif // QT_MOBILITY_SYSINFO

namespace GVA {

/*!

  Class to provide device information. It uses QtMobility QSystemDeviceInfo

  to provide information about battery level.

*/

class DeviceImpl : public QObject

{

      Q_OBJECT

public:

      DeviceImpl() :  m_batteryCharging(false) {};

      virtual ~DeviceImpl() {};

    virtual int getBatteryLevel() const = 0;

    virtual bool isBatteryCharging() const = 0;

  signals:

    // Sent when the battery level or charging state changes.

    void batteryLevelChanged(int);

protected:

    bool m_batteryCharging;

};

class DefaultDeviceImpl : public DeviceImpl

{

      Q_OBJECT

public:

      DefaultDeviceImpl() {};

      ~DefaultDeviceImpl() {};

    virtual int getBatteryLevel() const { return 100; }; // can't get real level, return full

    virtual bool isBatteryCharging() const { return m_batteryCharging; };

};

class DeviceDelegate : public QObject {

    Q_OBJECT

public:

    DeviceDelegate(DeviceImpl *deviceImpl);

    virtual ~DeviceDelegate();

    // properties accessible to javascript snippets

    Q_PROPERTY(int batteryLevel READ getBatteryLevel)

    Q_PROPERTY(bool batteryCharging READ isBatteryCharging)

    int getBatteryLevel() const;

    bool isBatteryCharging() const;

signals:

    // Sent when the battery level or charging state changes.

    void batteryLevelChanged(int);

private:

      DeviceImpl *m_deviceImpl;

};

} // GVA

#endif // DEVICEDELEGATE_H