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Code for Analog Clock Example

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package com.trolltech.examples;

import com.trolltech.qt.core.*;
import com.trolltech.qt.gui.*;

@QtJambiExample(name = "Analog Clock")
public class AnalogClock
    extends QWidget
{
    static QPolygon hourHand = new QPolygon();
    static QPolygon minuteHand = new QPolygon();
    static {
        hourHand.append(new QPoint(7, 8));
        hourHand.append(new QPoint(-7, 8));
        hourHand.append(new QPoint(0, -40));

        minuteHand.append(new QPoint(7, 8));
        minuteHand.append(new QPoint(-7, 8));
        minuteHand.append(new QPoint(0, -70));
    }

    QTimer m_timer = new QTimer(this);

    public AnalogClock() {
        this(null);
    }

    public AnalogClock(QWidget parent) {
        super(parent);
        m_timer.timeout.connect(this, "update()");

        setWindowTitle("Analog clock");
        setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));
        resize(200, 200);
    }

    @Override
    protected void paintEvent(QPaintEvent e)
    {
        QColor hourColor = new QColor(127, 0, 127);
        QColor minuteColor = new QColor(0, 127, 127, 191);

        int side = width() < height() ? width() : height();

        QTime time = QTime.currentTime();

        QPainter painter = new QPainter(this);
        painter.setRenderHint(QPainter.RenderHint.Antialiasing);
        painter.translate(width() / 2, height() / 2);
        painter.scale(side / 200.0f, side / 200.0f);

        painter.setPen(QPen.NoPen);
        painter.setBrush(hourColor);

        painter.save();
        painter.rotate(30.0f * ((time.hour() + time.minute() / 60.0f)));
        painter.drawConvexPolygon(hourHand);
        painter.restore();

        painter.setPen(hourColor);

        for (int i=0; i<12; ++i) {
            painter.drawLine(88, 0, 96, 0);
            painter.rotate(30.0f);
        }

        painter.setPen(QPen.NoPen);
        painter.setBrush(minuteColor);

        painter.save();
        painter.rotate(6.0f * (time.minute() + time.second() / 60.0f));
        painter.drawConvexPolygon(minuteHand);
        painter.restore();

        painter.setPen(minuteColor);

        for (int j=0; j<60; ++j) {
            if ((j % 5) != 0)
                painter.drawLine(92, 0, 96, 0);
            painter.rotate(6.0f);
        }
    }

    @Override
    public QSize sizeHint() {
        return new QSize(200, 200);
    }

    @Override
    public void showEvent(QShowEvent e) {
        m_timer.start(1000);
    }

    @Override
    public void hideEvent(QHideEvent e) {
        m_timer.stop();
    }

    static public void main(String args[])
    {
        QApplication.initialize(args);
        AnalogClock w = new AnalogClock();

        w.show();

        QApplication.exec();
    }
}


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Qt Jambi 4.5.2_01