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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "trafficlight.h"
#include <QtWidgets/qboxlayout.h>
#include <QtGui/qpainter.h>
using namespace Qt::Literals::StringLiterals;
class TrafficLightWidget : public QWidget
{
public:
TrafficLightWidget(QWidget *parent = nullptr)
: QWidget(parent), m_background(":/background.png"_L1)
{
QVBoxLayout *vbox = new QVBoxLayout(this);
vbox->setContentsMargins(0, 40, 0, 80);
m_red = new LightWidget(":/red.png"_L1);
vbox->addWidget(m_red, 0, Qt::AlignHCenter);
m_yellow = new LightWidget(":/yellow.png"_L1);
vbox->addWidget(m_yellow, 0, Qt::AlignHCenter);
m_green = new LightWidget(":/green.png"_L1);
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(u"red"_s, widget->redLight(), &LightWidget::switchLight);
machine->connectToState(u"redGoingGreen"_s, widget->redLight(), &LightWidget::switchLight);
machine->connectToState(u"yellow"_s, widget->yellowLight(), &LightWidget::switchLight);
machine->connectToState(u"blinking"_s, widget->yellowLight(), &LightWidget::switchLight);
machine->connectToState(u"green"_s, 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(":/play.png"_L1),
m_pauseIcon(":/pause.png"_L1)
{
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();
}
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