/*

* Copyright (c) 2008 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:  Clock widget

*

*/

#include <QTimer>

#include "hsclocksettingsnotifier_symbian.h"

#include <bacntf.h> // CEnvironmentChangeNotifier

namespace

{

    const char ANALOG[] = "analog";

    const char DIGITAL[] = "digital";

    const char TIME12[] = "TIME12";

    const char TIME24[] = "TIME24";

}

/*!

    \class HsClockSettingsNotifierType

    \ingroup group_HsClockSettingsNotifierplugin

    \brief Implementation for the observation of the system clock settings (analog/digital). 

*/

/*!

    Constructor

*/

HsClockSettingsNotifier::HsClockSettingsNotifier(QObject *parent)

    : QObject(parent),

      mDateTimeNotifier(0)

{

    mClockFormat = clockFormatString();

    mTimeFormat = timeFormatString();

    createObserver();

}

/*!

    Destructor.

*/

HsClockSettingsNotifier::~HsClockSettingsNotifier()

{

    delete mDateTimeNotifier;

}

/*!

    Returns the clock format ('analog'/'digital')

*/

QString HsClockSettingsNotifier::clockFormat() const

{

    return mClockFormat;

}

/*!

    Returns the time format ('12'/'24')

*/

QString HsClockSettingsNotifier::timeFormat() const

{

    return mTimeFormat;

}

/*!

    Callback function to receive system settings changes.

*/

TInt HsClockSettingsNotifier::EnvironmentChanged( TAny* aSelf )

{

    HsClockSettingsNotifier* self = static_cast<HsClockSettingsNotifier*>(aSelf);

    if ( self ){

        TInt change = self->mDateTimeNotifier->Change();

        if ( change & EChangesLocale ) {

            self->onSettingsChanged();

        }

    }

    return KErrNone;        

}

/*!

 Creates CEnvironmentChangeNotifier object to listen system settings changes.

*/

void HsClockSettingsNotifier::createObserver() 

{

    if ( !mDateTimeNotifier ){

        mDateTimeNotifier = CEnvironmentChangeNotifier::NewL( 

            CActive::EPriorityLow,

            TCallBack( EnvironmentChanged, this ) );

        mDateTimeNotifier->Start();            

    }

}   

/*!

    Reads clock format from system locale settings

*/

QString HsClockSettingsNotifier::clockFormatString() const

{

    TLocale locale;

    TClockFormat clockFormat = locale.ClockFormat();

    if ( clockFormat==EClockAnalog ) {

        return QString(ANALOG);

    } else {

        return QString(DIGITAL);

    }

}

/*!

    Reads time format from system locale settings

*/

QString HsClockSettingsNotifier::timeFormatString() const

{

    TLocale locale;

    TTimeFormat timeFormat = locale.TimeFormat();

    if ( timeFormat==ETime12 ) {

        return QString(TIME12);

    } else {

        return QString(TIME24);

    }

}

/*!

*/

void HsClockSettingsNotifier::onSettingsChanged()

{

    QString clockFormat = clockFormatString();

    QString timeFormat = timeFormatString();

    if ( clockFormat != mClockFormat || timeFormat != mTimeFormat ) {

        mClockFormat = clockFormat;

        mTimeFormat = timeFormat;

        emit settingsChanged(mClockFormat, mTimeFormat);

    }

}