qt5base-lts/examples/gui/analogclock/main.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "rasterwindow.h"
//! [5]
class AnalogClockWindow : public RasterWindow
{
public:
AnalogClockWindow();
protected:
void timerEvent(QTimerEvent *);
void render(QPainter *p);
private:
int m_timerId;
};
//! [5]
//! [6]
AnalogClockWindow::AnalogClockWindow()
{
setWindowTitle("Analog Clock");
resize(200, 200);
m_timerId = startTimer(1000);
}
//! [6]
//! [7]
void AnalogClockWindow::timerEvent(QTimerEvent *event)
{
if (event->timerId() == m_timerId)
renderLater();
}
//! [7]
//! [1] //! [14]
void AnalogClockWindow::render(QPainter *p)
{
//! [14]
//! [8]
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);
//! [8]
//! [9]
p->setRenderHint(QPainter::Antialiasing);
//! [9] //! [10]
p->translate(width() / 2, height() / 2);
int side = qMin(width(), height());
p->scale(side / 200.0, side / 200.0);
//! [1] //! [10]
//! [11]
p->setPen(Qt::NoPen);
p->setBrush(hourColor);
//! [11]
//! [2]
QTime time = QTime::currentTime();
p->save();
p->rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
p->drawConvexPolygon(hourHand, 3);
p->restore();
//! [2]
//! [12]
p->setPen(hourColor);
for (int i = 0; i < 12; ++i) {
p->drawLine(88, 0, 96, 0);
p->rotate(30.0);
}
//! [12] //! [13]
p->setPen(Qt::NoPen);
p->setBrush(minuteColor);
//! [13]
//! [3]
p->save();
p->rotate(6.0 * (time.minute() + time.second() / 60.0));
p->drawConvexPolygon(minuteHand, 3);
p->restore();
//! [3]
//! [4]
p->setPen(minuteColor);
for (int j = 0; j < 60; ++j) {
if ((j % 5) != 0)
p->drawLine(92, 0, 96, 0);
p->rotate(6.0);
}
//! [4]
}
int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
AnalogClockWindow clock;
clock.show();
app.exec();
}