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| |
| #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<>::of(&QWidget::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(); |
| } |