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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "analogclock.h"
#include <QPainter>
#include <QTime>
#include <QTimer>
//! [0] //! [1]
AnalogClock::AnalogClock(QWidget *parent)
//! [0] //! [2]
: QWidget(parent)
//! [2] //! [3]
{
//! [3] //! [4]
QTimer *timer = new QTimer(this);
//! [4] //! [5]
connect(timer, &QTimer::timeout, this, QOverload<>::of(&AnalogClock::update));
//! [5] //! [6]
timer->start(1000);
//! [6]
setWindowTitle(tr("Analog Clock"));
resize(200, 200);
//! [7]
}
//! [1] //! [7]
//! [8] //! [9]
void AnalogClock::paintEvent(QPaintEvent *)
//! [8] //! [10]
{
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();
//! [10]
//! [11]
QPainter painter(this);
//! [11] //! [12]
painter.setRenderHint(QPainter::Antialiasing);
//! [12] //! [13]
painter.translate(width() / 2, height() / 2);
//! [13] //! [14]
painter.scale(side / 200.0, side / 200.0);
//! [9] //! [14]
//! [15]
painter.setPen(Qt::NoPen);
//! [15] //! [16]
painter.setBrush(hourColor);
//! [16]
//! [17] //! [18]
painter.save();
//! [17] //! [19]
painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
painter.drawConvexPolygon(hourHand, 3);
painter.restore();
//! [18] //! [19]
//! [20]
painter.setPen(hourColor);
//! [20] //! [21]
for (int i = 0; i < 12; ++i) {
painter.drawLine(88, 0, 96, 0);
painter.rotate(30.0);
}
//! [21]
//! [22]
painter.setPen(Qt::NoPen);
//! [22] //! [23]
painter.setBrush(minuteColor);
//! [24]
painter.save();
painter.rotate(6.0 * (time.minute() + time.second() / 60.0));
painter.drawConvexPolygon(minuteHand, 3);
painter.restore();
//! [23] //! [24]
//! [25]
painter.setPen(minuteColor);
//! [25] //! [26]
//! [27]
for (int j = 0; j < 60; ++j) {
if ((j % 5) != 0)
painter.drawLine(92, 0, 96, 0);
painter.rotate(6.0);
}
//! [27]
}
//! [26]
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