Code for Analog Clock Example
/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of Qt Jambi.
**
** ** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
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** http://www.trolltech.com/products/qt/opensource.html
**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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();
}
}