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#include <QtGui>

#include "shapedclock.h"

//! [0]

ShapedClock::ShapedClock(QWidget *parent)

    : QWidget(parent, Qt::FramelessWindowHint | Qt::WindowSystemMenuHint)

{

    QTimer *timer = new QTimer(this);

    connect(timer, SIGNAL(timeout()), this, SLOT(update()));

    timer->start(1000);

    QAction *quitAction = new QAction(tr("E&xit"), this);

    quitAction->setShortcut(tr("Ctrl+Q"));

    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

    addAction(quitAction);

    setContextMenuPolicy(Qt::ActionsContextMenu);

    setToolTip(tr("Drag the clock with the left mouse button.\n"

                  "Use the right mouse button to open a context menu."));

    setWindowTitle(tr("Shaped Analog Clock"));

}

//! [0]

//! [1]

void ShapedClock::mousePressEvent(QMouseEvent *event)

{

    if (event->button() == Qt::LeftButton) {

        dragPosition = event->globalPos() - frameGeometry().topLeft();

        event->accept();

    }

}

//! [1]

//! [2]

void ShapedClock::mouseMoveEvent(QMouseEvent *event)

{

    if (event->buttons() & Qt::LeftButton) {

        move(event->globalPos() - dragPosition);

        event->accept();

    }

}

//! [2]

//! [3]

void ShapedClock::paintEvent(QPaintEvent *)

{

    static const QPoint hourHand[3] = {

        QPoint(7, 8),

        QPoint(-7, 8),

        QPoint(0, -40)

    };

    static const QPoint minuteHand[3] = {

        QPoint(7, 8),

        QPoint(-7, 8),

        QPoint(0, -70)

    };

    QColor hourColor(127, 0, 127);

    QColor minuteColor(0, 127, 127, 191);

    int side = qMin(width(), height());

    QTime time = QTime::currentTime();

    QPainter painter(this);

    painter.setRenderHint(QPainter::Antialiasing);

    painter.translate(width() / 2, height() / 2);

    painter.scale(side / 200.0, side / 200.0);

    painter.setPen(Qt::NoPen);

    painter.setBrush(hourColor);

    painter.save();

    painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));

    painter.drawConvexPolygon(hourHand, 3);

    painter.restore();

    painter.setPen(hourColor);

    for (int i = 0; i < 12; ++i) {

        painter.drawLine(88, 0, 96, 0);

        painter.rotate(30.0);

    }

    painter.setPen(Qt::NoPen);

    painter.setBrush(minuteColor);

    painter.save();

    painter.rotate(6.0 * (time.minute() + time.second() / 60.0));

    painter.drawConvexPolygon(minuteHand, 3);

    painter.restore();

    painter.setPen(minuteColor);

    for (int j = 0; j < 60; ++j) {

        if ((j % 5) != 0)

            painter.drawLine(92, 0, 96, 0);

        painter.rotate(6.0);

    }

}

//! [3]

//! [4]

void ShapedClock::resizeEvent(QResizeEvent * /* event */)

{

    int side = qMin(width(), height());

    QRegion maskedRegion(width() / 2 - side / 2, height() / 2 - side / 2, side,

                         side, QRegion::Ellipse);

    setMask(maskedRegion);

}

//! [4]

//! [5]

QSize ShapedClock::sizeHint() const

{

    return QSize(100, 100);

}

//! [5]