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| |
| #include <QtGui> |
| |
| #include "rasterwindow.h" |
| |
| //! [5] |
| class AnalogClockWindow : public RasterWindow |
| { |
| public: |
| AnalogClockWindow(); |
| |
| protected: |
| void timerEvent(QTimerEvent *) override; |
| void render(QPainter *p) override; |
| |
| private: |
| int m_timerId; |
| }; |
| //! [5] |
| |
| |
| //! [6] |
| AnalogClockWindow::AnalogClockWindow() |
| { |
| setTitle("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(); |
| |
| return app.exec(); |
| } |