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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "worldtimeclock.h"
#include <QMouseEvent>
#include <QPainter>
#include <QTimer>
WorldTimeClock::WorldTimeClock(QWidget *parent)
: QWidget(parent)
{
QTimer *timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, qOverload<>(&QWidget::update));
timer->start(1000);
setWindowTitle(tr("World Time Clock"));
resize(200, 200);
}
void WorldTimeClock::paintEvent(QPaintEvent *)
{
static const QPoint hourHand[3] = {{7, 8}, {-7, 8}, {0, -40}};
static const QPoint minuteHand[3] = {{7, 8}, {-7, 8}, {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();
}
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