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#include "qdesktopwidget.h"

#include "qapplication_p.h"

#include "qwidget_p.h"

#include "qt_s60_p.h"

#include <w32std.h>

#include "hal.h"

#include "hal_data.h"

QT_BEGIN_NAMESPACE

class QDesktopWidgetPrivate : public QWidgetPrivate

{

public:

    QDesktopWidgetPrivate();

    ~QDesktopWidgetPrivate();

    static void init(QDesktopWidget *that);

    static void cleanup();

    static int screenCount;

    static int primaryScreen;

    static QVector<QRect> *rects;

    static QVector<QRect> *workrects;

    static int refcount;

};

int QDesktopWidgetPrivate::screenCount = 1;

int QDesktopWidgetPrivate::primaryScreen = 0;

QVector<QRect> *QDesktopWidgetPrivate::rects = 0;

QVector<QRect> *QDesktopWidgetPrivate::workrects = 0;

int QDesktopWidgetPrivate::refcount = 0;

QDesktopWidgetPrivate::QDesktopWidgetPrivate()

{

    ++refcount;

}

QDesktopWidgetPrivate::~QDesktopWidgetPrivate()

{

    if (!--refcount)

        cleanup();

}

void QDesktopWidgetPrivate::init(QDesktopWidget *that)

{

    int screenCount=0;

    if (HAL::Get(0, HALData::EDisplayNumberOfScreens, screenCount) == KErrNone)

        QDesktopWidgetPrivate::screenCount = screenCount;

    else

        QDesktopWidgetPrivate::screenCount = 0;

    rects = new QVector<QRect>();

    workrects = new QVector<QRect>();

    rects->resize(QDesktopWidgetPrivate::screenCount);

    workrects->resize(QDesktopWidgetPrivate::screenCount);

    // ### TODO: Implement proper multi-display support

    rects->resize(1);

    rects->replace(0, that->rect());

    workrects->resize(1);

    workrects->replace(0, that->rect());

}

void QDesktopWidgetPrivate::cleanup()

{

    delete rects;

    rects = 0;

    delete workrects;

    workrects = 0;

}

QDesktopWidget::QDesktopWidget()

    : QWidget(*new QDesktopWidgetPrivate, 0, Qt::Desktop)

{

    setObjectName(QLatin1String("desktop"));

    QDesktopWidgetPrivate::init(this);

}

QDesktopWidget::~QDesktopWidget()

{

}

bool QDesktopWidget::isVirtualDesktop() const

{

    return true;

}

int QDesktopWidget::primaryScreen() const

{

    return QDesktopWidgetPrivate::primaryScreen;

}

int QDesktopWidget::numScreens() const

{

    Q_D(const QDesktopWidget);

    return QDesktopWidgetPrivate::screenCount;

}

QWidget *QDesktopWidget::screen(int /* screen */)

{

    return this;

}

const QRect QDesktopWidget::availableGeometry(int /* screen */) const

{

    TRect clientRect = static_cast<CEikAppUi*>(S60->appUi())->ClientRect();

    return qt_TRect2QRect(clientRect);

}

const QRect QDesktopWidget::screenGeometry(int /* screen */) const

{

    Q_D(const QDesktopWidget);

    return QRect(0, 0, S60->screenWidthInPixels, S60->screenHeightInPixels);

    }

int QDesktopWidget::screenNumber(const QWidget * /* widget */) const

{

    return QDesktopWidgetPrivate::primaryScreen;

}

int QDesktopWidget::screenNumber(const QPoint & /* point */) const

{

    return QDesktopWidgetPrivate::primaryScreen;

}

void QDesktopWidget::resizeEvent(QResizeEvent *)

{

    Q_D(QDesktopWidget);

    QVector<QRect> oldrects;

    oldrects = *d->rects;

    QVector<QRect> oldworkrects;

    oldworkrects = *d->workrects;

    int oldscreencount = d->screenCount;

    QDesktopWidgetPrivate::cleanup();

    QDesktopWidgetPrivate::init(this);

    for (int i = 0; i < qMin(oldscreencount, d->screenCount); ++i) {

        QRect oldrect = oldrects[i];

        QRect newrect = d->rects->at(i);

        if (oldrect != newrect)

            emit resized(i);

    }

    for (int j = 0; j < qMin(oldscreencount, d->screenCount); ++j) {

        QRect oldrect = oldworkrects[j];

        QRect newrect = d->workrects->at(j);

        if (oldrect != newrect)

            emit workAreaResized(j);

    }

}

QT_END_NAMESPACE