/*

* Copyright (c) 2009 - 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: Oled Clock Widget.

*

*/

#include "snsroledclockwidget.h"

#include "snsrlabel.h"

#include "snsrcolors.h"

#include <QGraphicsSvgItem>

#include <QTime>

#include <QDebug>

#include <QLocale>

#include <HbExtendedLocale>

#include <HbStyleLoader>

#include <HbIconItem>

#include <HbTextItem>

const char *gOledClockCssFilePath = ":/style/snsroledclockwidget.css";

const char *gOledClockWidgetMLFilePath = ":/style/snsroledclockwidget.widgetml";

/*!

    \class SnsrOledClockWidget

    \ingroup group_snsrbigclockscreensaverprovider

    \brief Screensaver oled clock widget.

 */

/*!

    Constructs a new SnsrOledClockWidget.

    \param parent Parent object.

 */

SnsrOledClockWidget::SnsrOledClockWidget(QGraphicsItem* parent):

    HbWidget(parent),

    mClockBackground(0), mClockHourHand(0), mClockMinuteHand(0),

    mClockAmPmLabel(0)

{

    HbStyleLoader::registerFilePath(gOledClockCssFilePath);

    HbStyleLoader::registerFilePath(gOledClockWidgetMLFilePath);

    createPrimitives();

    updatePrimitives();

}

void SnsrOledClockWidget::polish( HbStyleParameters& params )

{

    // TODO: updatePrimitives might not be needed to be called from here anymore (hb changes)?

    HbWidget::polish(params);

    updatePrimitives();

}

/*!

    Destructs the class.

 */

SnsrOledClockWidget::~SnsrOledClockWidget()

{

    HbStyleLoader::unregisterFilePath( gOledClockCssFilePath );

    HbStyleLoader::unregisterFilePath( gOledClockWidgetMLFilePath );

}

/*!

    @copydoc HbWidget::resizeEvent()

 */

void SnsrOledClockWidget::resizeEvent(QGraphicsSceneResizeEvent *event)

{

    HbWidget::resizeEvent(event);

    updatePrimitives();

}

/*!

    Creates all widget primitives.

 */

void SnsrOledClockWidget::createPrimitives()

{

    // TODO: final graphics will be named qtg_graf_screensaver_clock_oled_xxx.

    // not available in platform yet

    if (!mClockBackground) {

        mClockBackground = new HbIconItem(QLatin1String("qtg_graf_clock_night_bg"), this);

        HbStyle::setItemName(mClockBackground, QLatin1String("oled_clock_background"));

    }

    if (!mClockHourHand) {

        mClockHourHand = new HbIconItem(QLatin1String("qtg_graf_clock_night_hour"), this);

        HbStyle::setItemName(mClockHourHand, QLatin1String("oled_clock_hour_hand"));

    }

    if (!mClockMinuteHand) {

        mClockMinuteHand = new HbIconItem(QLatin1String("qtg_graf_clock_night_min"), this);

        HbStyle::setItemName(mClockMinuteHand, QLatin1String("oled_clock_minute_hand"));

    }

    if (!mClockAmPmLabel) {

        mClockAmPmLabel = new HbTextItem(this);

        HbStyle::setItemName(mClockAmPmLabel, QLatin1String("oled_clock_am_pm_label"));

        mClockAmPmLabel->setTextColor(SnsrColors::PowerSaveModeWidgetColor);

        mClockAmPmLabel->setMinimumLines(1);

        mClockAmPmLabel->setMaximumLines(1);

        mClockAmPmLabel->setTextWrapping(Hb::TextNoWrap);

        HbFontSpec textFont(HbFontSpec::Primary);

        qreal textHeight = 0;

        style()->parameter(QLatin1String("hb-param-text-height-tiny"), textHeight);

        textFont.setTextHeight(textHeight);

        mClockAmPmLabel->setFontSpec(textFont);

    }

}

/*!

    @copydoc HbWidget::updatePrimitives()

 */

void SnsrOledClockWidget::updatePrimitives()

{

    if (!mClockHourHand || !mClockMinuteHand || !mClockAmPmLabel) {

        createPrimitives();

    }

    Q_ASSERT( mClockHourHand && mClockMinuteHand && mClockAmPmLabel );

    // Calculate angles for clock hands.

    // Use granularity of one minute so that minute hand is always exactly

    // on some minute and not between minutes. OLED clock is not updated more

    // frequently than once per minute and using finer granularity would cause

    // the minute hand to be always between even minutes.

    QTime time = QTime::currentTime();

    qreal m = 6 * time.minute();

    qreal h = 30 * ((time.hour() % 12) + m/360);

    int x = mClockHourHand->preferredSize().width()/2;

    int y = mClockHourHand->preferredSize().height()/2;

    mClockHourHand->setTransform(QTransform().translate(x, y).rotate(h).translate(-x, -y));

    x = mClockMinuteHand->preferredSize().width()/2;

    y = mClockMinuteHand->preferredSize().height()/2;

    mClockMinuteHand->setTransform(QTransform().translate(x, y).rotate(m).translate(-x, -y));

    QString amPmString = (time.hour()<12) ? HbExtendedLocale().amText() : HbExtendedLocale().pmText();

    mClockAmPmLabel->setText( amPmString );

}

/*!

    Updates primitives when time change.

 */

void SnsrOledClockWidget::tick()

{

    updatePrimitives();

}