| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtScxml module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
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| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
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| ****************************************************************************/ |
| |
| #include "trafficlight.h" |
| |
| #include <QPainter> |
| #include <QVBoxLayout> |
| |
| class TrafficLightWidget : public QWidget |
| { |
| public: |
| TrafficLightWidget(QWidget *parent = nullptr) |
| : QWidget(parent), m_background(QLatin1String(":/background.png")) |
| { |
| QVBoxLayout *vbox = new QVBoxLayout(this); |
| vbox->setContentsMargins(0, 40, 0, 80); |
| m_red = new LightWidget(QLatin1String(":/red.png")); |
| vbox->addWidget(m_red, 0, Qt::AlignHCenter); |
| m_yellow = new LightWidget(QLatin1String(":/yellow.png")); |
| vbox->addWidget(m_yellow, 0, Qt::AlignHCenter); |
| m_green = new LightWidget(QLatin1String(":/green.png")); |
| vbox->addWidget(m_green, 0, Qt::AlignHCenter); |
| setLayout(vbox); |
| } |
| |
| LightWidget *redLight() const |
| { return m_red; } |
| LightWidget *yellowLight() const |
| { return m_yellow; } |
| LightWidget *greenLight() const |
| { return m_green; } |
| |
| void paintEvent(QPaintEvent *) override |
| { |
| QPainter painter(this); |
| painter.setRenderHint(QPainter::Antialiasing); |
| painter.drawImage(0, 0, m_background); |
| } |
| |
| QSize sizeHint() const override |
| { |
| return m_background.size(); |
| } |
| |
| private: |
| QImage m_background; |
| LightWidget *m_red; |
| LightWidget *m_yellow; |
| LightWidget *m_green; |
| }; |
| |
| TrafficLight::TrafficLight(QScxmlStateMachine *machine, QWidget *parent) |
| : QWidget(parent) |
| , m_machine(machine) |
| { |
| TrafficLightWidget *widget = new TrafficLightWidget(this); |
| setFixedSize(widget->sizeHint()); |
| |
| machine->connectToState(QStringLiteral("red"), |
| widget->redLight(), &LightWidget::switchLight); |
| machine->connectToState(QStringLiteral("redGoingGreen"), |
| widget->redLight(), &LightWidget::switchLight); |
| machine->connectToState(QStringLiteral("yellow"), |
| widget->yellowLight(), &LightWidget::switchLight); |
| machine->connectToState(QStringLiteral("blinking"), |
| widget->yellowLight(), &LightWidget::switchLight); |
| machine->connectToState(QStringLiteral("green"), |
| widget->greenLight(), &LightWidget::switchLight); |
| |
| QAbstractButton *button = new ButtonWidget(this); |
| auto setButtonGeometry = [this, button](){ |
| QSize buttonSize = button->sizeHint(); |
| button->setGeometry(width() - buttonSize.width() - 20, |
| height() - buttonSize.height() - 20, |
| buttonSize.width(), buttonSize.height()); |
| }; |
| connect(button, &QAbstractButton::toggled, this, setButtonGeometry); |
| setButtonGeometry(); |
| |
| connect(button, &QAbstractButton::toggled, |
| this, &TrafficLight::toggleWorking); |
| } |
| |
| void TrafficLight::toggleWorking(bool pause) |
| { |
| m_machine->submitEvent(pause ? "smash" : "repair"); |
| } |
| |
| LightWidget::LightWidget(const QString &image, QWidget *parent) |
| : QWidget(parent) |
| , m_image(image) |
| {} |
| |
| bool LightWidget::isOn() const |
| { return m_on; } |
| |
| void LightWidget::setOn(bool on) |
| { |
| if (on == m_on) |
| return; |
| m_on = on; |
| update(); |
| } |
| |
| void LightWidget::switchLight(bool onoff) |
| { setOn(onoff); } |
| |
| void LightWidget::paintEvent(QPaintEvent *) |
| { |
| if (!m_on) |
| return; |
| QPainter painter(this); |
| painter.setRenderHint(QPainter::Antialiasing); |
| painter.drawImage(0, 0, m_image); |
| } |
| |
| QSize LightWidget::sizeHint() const |
| { |
| return m_image.size(); |
| } |
| |
| ButtonWidget::ButtonWidget(QWidget *parent) : |
| QAbstractButton(parent), m_playIcon(QLatin1String(":/play.png")), |
| m_pauseIcon(QLatin1String(":/pause.png")) |
| { |
| setCheckable(true); |
| } |
| |
| void ButtonWidget::paintEvent(QPaintEvent *) |
| { |
| QPainter painter(this); |
| painter.setRenderHint(QPainter::Antialiasing); |
| painter.drawImage(0, 0, isChecked() ? m_playIcon : m_pauseIcon); |
| } |
| |
| QSize ButtonWidget::sizeHint() const |
| { |
| return isChecked() ? m_playIcon.size() : m_pauseIcon.size(); |
| } |