/*

* 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:  Base class container.

*

*/

#include "snsrbigclockcontainer.h"

#include <QPainter>

#include <QDebug>

#include <QTime>

#include <QGraphicsLinearLayout>

#include <hblabel.h>

#include <hbevent.h>

#include <hbcolorscheme.h>

#include <qsysteminfo.h>

#include "snsrbigclockcontainer.h"

#include "snsrindicatorwidget.h"

#include "snsrindicatormodel.h"

/*!

    \class SnsrBigClockContainer

    \ingroup group_snsrbigclockscreensaverplugin

    \brief Base class. Container used for drawing background and for preparing layout.

 */

const QString snsrBackgroundColorRole("snsrbackground");

const int gStep(5);

QTM_USE_NAMESPACE

/*!

    Constructs a new SnsrBigClockContainer.

 */

SnsrBigClockContainer::SnsrBigClockContainer() :

    mBackgroundContainerLayout(0),

    mMainView(0),

    mMainContainer(0),

    mIndicatorModel(0),

    mIndicatorWidget(0),

    mCurrentOrientation(-1)

{

    setBackgroundColor();

    mBackgroundContainerLayout = new QGraphicsLinearLayout(Qt::Vertical);

    setLayout(mBackgroundContainerLayout);

    qsrand(QTime::currentTime().msec());

}

/*!

    Destructs the class.

 */

SnsrBigClockContainer::~SnsrBigClockContainer()

{

    resetIndicatorConnections();

    // e.g. mIndicatorWidget gets deleted during these calls

    mDocumentLoader.reset();

    qDeleteAll(mDocumentObjects);

    mDocumentObjects.clear();

    //mMainContainer,mBackgroundContainerLayout - deleted by the parent

    mIndicatorModel=0; // not owned

}

/*!

    \fn virtual void update() = 0;

    Slot for members update in container e.g. when time or date changed.

 */

/*!

    \fn virtual void changeLayout(Qt::Orientation orientation) = 0;

    Slot for members update in container when orientation changed.

 */

/*!

    \fn virtual int updateIntervalInMilliseconds() = 0;

    Concrete inherited container classes must implement this to return

    the desired update interval for that clock mode.

 */

/*!

    Set used indicator model and do necessary initializations to show currently

    active indicators.

 */

void SnsrBigClockContainer::initIndicators(SnsrIndicatorModel &model)

{

    mIndicatorModel = &model;

    if (mIndicatorWidget) {

        connect(mIndicatorModel, SIGNAL(indicatorsUpdated(QList<SnsrIndicatorInfo>)),

                mIndicatorWidget, SLOT(showIndicators(QList<SnsrIndicatorInfo>)));

        connect(mIndicatorModel, SIGNAL(allIndicatorsDeactivated()),

                mIndicatorWidget, SLOT(removeAllIndicators()));

        mIndicatorModel->initializeIndicatorWidget();

    }

}

/*!

    \reimp

 */

void SnsrBigClockContainer::changeEvent(QEvent *event)

{

    if (event->type() == HbEvent::ThemeChanged) {

        setBackgroundColor();

    }

    return QGraphicsWidget::changeEvent(event);

}

/*!

    Returns random point for given range.

    \param rect Area within which the generated point will be.

 */

QPointF SnsrBigClockContainer::randomPosition(const QRectF &rect)

{

    int width( rect.width() );

    int height( rect.height() );

    if ( width > 0 && height > 0 ) {

        return rect.topLeft() + QPointF( qrand()%width, qrand()%height );

    }

    else {

        return QPointF();

    }

}

/*!

    Returns new position between curRect position and destPos position.

    \param curPos Current position.

    \param destPos Destination position. When current position is near this

                   position or outside of the container, a new value is generated.

    \param containerRect The container within which the destination position will always

                         be after a call.

 */

QPointF SnsrBigClockContainer::nextRandomPosition(const QPointF &curPos, QPointF &destPos, const QRectF &containerRect)

{

    const int delta(gStep+2);

    const int minCntDimension(3*delta);

    // The random movement logic can work only if the container has enough space to move the

    // clock around. If the container is too small, just return the middle point of the container.

    if ( containerRect.width() < minCntDimension && containerRect.height() < minCntDimension ) {

        return containerRect.center();

    }

    int xDistance = abs( destPos.x() - curPos.x() );

    int yDistance = abs( destPos.y() - curPos.y() );

    // Generate new destination position when current widget position is close to 

    // destination random position or when current destination position is out of bounds.

    // It is possible that the new random position is very close to the current position,

    // in which case the random position is generated again.

    // It is paramount that container is large enough when next loop is entered

    // to prevent infinite looping.

    while ( (xDistance < delta && yDistance < delta)

            || !containerRect.contains(destPos) ) {

        destPos = randomPosition( containerRect );

        xDistance = abs( destPos.x() - curPos.x() );

        yDistance = abs( destPos.y() - curPos.y() );

    }

    // If, for some reason, the current position is out-of-bounds, then there's no

    // point to slowly move towards the destination. In that case, move immediately

    // to destination point.

    if ( !containerRect.contains(curPos) ) {

        return destPos;

    }

    // Otherwise, this is normal case and we will calculate a point which is just

    // a bit closer to the destination.

    // Version 1:

    //  o-----o---------------------------o

    //  p1    p2                          p3

    //

    // Version 2:

    //  o---------------------------o-----o

    //  p3                          p2    p1

    //

    // p1 - current widget position

    // p2 - next position to compute

    // p3 - destination random position

    QPointF p1(curPos);

    QPointF p2(0,0);

    QPointF p3(destPos);

    // Computes point p2 - new position between p1 and p3

    // Move the coordinate which is further away from the destination

    // and calculate the other coordinate from that so that the

    // result point p2 lies on the straigth line between p1 and p3.

    if ( yDistance > xDistance ) {

        if (p3.y() > p1.y()) {

            p2.setY(p1.y()+gStep);

        }

        else {

            p2.setY(p1.y()-gStep);

        }

        p2.setX((((p2.y()-p1.y())*(p3.x()-p1.x())) / (p3.y()-p1.y())) + p1.x()); // x2 = (((y2-y1)*(x3-x1)) / (y3-y1)) + x1

    }

    else {

        if (p3.x() > p1.x()) {

            p2.setX(p1.x()+gStep);

        }

        else {

            p2.setX(p1.x()-gStep);

        }

        p2.setY((((p3.y()-p1.y())*(p2.x()-p1.x())) / (p3.x()-p1.x())) + p1.y()); // y2 = (((y3-y1)*(x2-x1)) / (x3-x1)) + y1

    }

    // Return new position between points p1 and p3.

    return p2;

}

/*!

    Disconnect connections between indicator model and widget.

 */

void SnsrBigClockContainer::resetIndicatorConnections()

{

    disconnect(mIndicatorModel, SIGNAL(indicatorsUpdated(QList<SnsrIndicatorInfo>)),

               mIndicatorWidget, SLOT(showIndicators(QList<SnsrIndicatorInfo>)));

    disconnect(mIndicatorModel, SIGNAL(allIndicatorsDeactivated()),

               mIndicatorWidget, SLOT(removeAllIndicators()));

}

/*!

    Set background color.

 */

void SnsrBigClockContainer::setBackgroundColor()

{

    QColor backgroundColor = HbColorScheme::color(snsrBackgroundColorRole);

    if (backgroundColor.isValid()) {

        mBackgroundColor = backgroundColor;

    }

    else {

        mBackgroundColor = Qt::black;

    }

}

/*!

    Paints the contents of an item in local coordinates.

 */

#ifdef COVERAGE_MEASUREMENT

#pragma CTC SKIP

#endif //COVERAGE_MEASUREMENT

void SnsrBigClockContainer::paint(

        QPainter *painter,

        const QStyleOptionGraphicsItem *option,

        QWidget *widget

        )

{

    Q_UNUSED(option)

    Q_UNUSED(widget)

    painter->fillRect(rect(), mBackgroundColor);

}

#ifdef COVERAGE_MEASUREMENT

#pragma CTC ENDSKIP

#endif //COVERAGE_MEASUREMENT