133 lines
2.7 KiB
C++
133 lines
2.7 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "analogclock.h"
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#include <QPainter>
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#include <QTime>
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#include <QTimer>
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//! [0] //! [1]
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AnalogClock::AnalogClock(QWidget *parent)
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//! [0] //! [2]
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: QWidget(parent)
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//! [2] //! [3]
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{
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//! [3] //! [4]
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QTimer *timer = new QTimer(this);
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//! [4] //! [5]
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connect(timer, &QTimer::timeout, this, QOverload<>::of(&AnalogClock::update));
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//! [5] //! [6]
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timer->start(1000);
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//! [6]
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setWindowTitle(tr("Analog Clock"));
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resize(200, 200);
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//! [7]
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}
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//! [1] //! [7]
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//! [8] //! [9]
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void AnalogClock::paintEvent(QPaintEvent *)
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//! [8] //! [10]
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{
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static const QPoint hourHand[4] = {
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QPoint(5, 14),
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QPoint(-5, 14),
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QPoint(-4, -71),
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QPoint(4, -71)
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};
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static const QPoint minuteHand[4] = {
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QPoint(4, 14),
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QPoint(-4, 14),
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QPoint(-3, -89),
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QPoint(3, -89)
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};
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static const QPoint secondsHand[4] = {
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QPoint(1, 14),
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QPoint(-1, 14),
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QPoint(-1, -89),
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QPoint(1, -89)
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};
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const QColor hourColor(palette().color(QPalette::Text));
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const QColor minuteColor(palette().color(QPalette::Text));
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const QColor secondsColor(palette().color(QPalette::Accent));
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int side = qMin(width(), height());
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//! [10]
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//! [11]
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QPainter painter(this);
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//! [11] //! [12]
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painter.setRenderHint(QPainter::Antialiasing);
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//! [12] //! [13]
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painter.translate(width() / 2, height() / 2);
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painter.scale(side / 200.0, side / 200.0);
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//! [9] //! [13]
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//! [14]
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QTime time = QTime::currentTime();
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//! [14]
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//! [15]
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painter.setPen(Qt::NoPen);
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//! [15] //! [16]
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painter.setBrush(hourColor);
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//! [16]
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//! [18]
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//! [17]
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painter.save();
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//! [17] //! [19]
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painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
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painter.drawConvexPolygon(hourHand, 4);
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painter.restore();
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//! [18] //! [19]
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//! [20]
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for (int i = 0; i < 12; ++i) {
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painter.drawRect(73, -3, 16, 6);
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painter.rotate(30.0);
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}
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//! [20]
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//! [21]
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painter.setBrush(minuteColor);
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//! [22]
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painter.save();
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painter.rotate(6.0 * time.minute());
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painter.drawConvexPolygon(minuteHand, 4);
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painter.restore();
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//! [21] //! [22]
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//! [23]
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painter.setBrush(secondsColor);
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//! [23]
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//! [24]
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painter.save();
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painter.rotate(6.0 * time.second());
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painter.drawConvexPolygon(secondsHand, 4);
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painter.drawEllipse(-3, -3, 6, 6);
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painter.drawEllipse(-5, -68, 10, 10);
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painter.restore();
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//! [24]
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//! [25]
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painter.setPen(minuteColor);
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//! [25] //! [26]
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//! [27]
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for (int j = 0; j < 60; ++j) {
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painter.drawLine(92, 0, 96, 0);
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painter.rotate(6.0);
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}
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//! [27]
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}
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//! [26]
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