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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** 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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****************************************************************************/
#include <QtGui>
#include "worldtimeclock.h"
WorldTimeClock::WorldTimeClock(QWidget *parent)
: QWidget(parent)
{
timeZoneOffset = 0;
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(1000);
setWindowTitle(tr("World Time Clock"));
resize(200, 200);
}
void WorldTimeClock::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();
time = time.addSecs(timeZoneOffset);
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);
}
emit updated(time);
}
void WorldTimeClock::setTimeZone(int hourOffset)
{
timeZoneOffset = qMin(qMax(-12, hourOffset), 12) * 3600;
update();
}</pre>
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