qt 6.5.1 original

examples/dbus/remotecontrolledcar/car/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/dbus/remotecontrolledcar/car")
+
+set(car_SRCS)
+qt_add_dbus_adaptor(car_SRCS
+    ../common/car.xml
+    qobject.h
+    "" # empty parent_class value on purpose to not pass -l flag
+    car_adaptor
+)
+
+qt_add_executable(car
+    car.cpp car.h
+    main.cpp
+    ${car_SRCS}
+)
+
+set_target_properties(car PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(car PRIVATE
+    Qt6::Core
+    Qt6::DBus
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+install(TARGETS car
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/dbus/remotecontrolledcar/car/car.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "car.h"
+#include <QtWidgets/QtWidgets>
+#include <cmath>
+
+QRectF Car::boundingRect() const
+{
+    return QRectF(-35, -81, 70, 115);
+}
+
+Car::Car()
+{
+    startTimer(1000 / 33);
+    setFlags(ItemIsMovable | ItemIsFocusable);
+}
+
+void Car::accelerate()
+{
+    if (speed < 10)
+        ++speed;
+}
+
+void Car::decelerate()
+{
+    if (speed > -10)
+        --speed;
+}
+
+void Car::turnLeft()
+{
+    if (wheelsAngle > -30)
+        wheelsAngle -= 5;
+}
+
+void Car::turnRight()
+{
+    if (wheelsAngle < 30)
+       wheelsAngle += 5;
+}
+
+void Car::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(option);
+    Q_UNUSED(widget);
+
+    painter->setBrush(Qt::gray);
+    painter->drawRect(-20, -58, 40, 2); // front axel
+    painter->drawRect(-20, 7, 40, 2); // rear axel
+
+    painter->setBrush(color);
+    painter->drawRect(-25, -79, 50, 10); // front wing
+
+    painter->drawEllipse(-25, -48, 50, 20); // side pods
+    painter->drawRect(-25, -38, 50, 35); // side pods
+    painter->drawRect(-5, 9, 10, 10); // back pod
+
+    painter->drawEllipse(-10, -81, 20, 100); // main body
+
+    painter->drawRect(-17, 19, 34, 15); // rear wing
+
+    painter->setBrush(Qt::black);
+    painter->drawPie(-5, -51, 10, 15, 0, 180 * 16);
+    painter->drawRect(-5, -44, 10, 10); // cocpit
+
+    painter->save();
+    painter->translate(-20, -58);
+    painter->rotate(wheelsAngle);
+    painter->drawRect(-10, -7, 10, 15); // front left
+    painter->restore();
+
+    painter->save();
+    painter->translate(20, -58);
+    painter->rotate(wheelsAngle);
+    painter->drawRect(0, -7, 10, 15); // front left
+    painter->restore();
+
+    painter->drawRect(-30, 0, 12, 17); // rear left
+    painter->drawRect(19, 0, 12, 17);  // rear right
+}
+
+void Car::timerEvent(QTimerEvent *event)
+{
+    Q_UNUSED(event);
+
+    const qreal axelDistance = 54;
+    qreal wheelsAngleRads = qDegreesToRadians(wheelsAngle);
+    qreal turnDistance = std::cos(wheelsAngleRads) * axelDistance * 2;
+    qreal turnRateRads = wheelsAngleRads / turnDistance;  // rough estimate
+    qreal turnRate = qRadiansToDegrees(turnRateRads);
+    qreal rotation = speed * turnRate;
+
+    setTransform(QTransform().rotate(rotation), true);
+    setTransform(QTransform::fromTranslate(0, -speed), true);
+    update();
+}

examples/dbus/remotecontrolledcar/car/car.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef CAR_H
+#define CAR_H
+
+#include <QGraphicsObject>
+#include <QBrush>
+
+class Car : public QGraphicsObject
+{
+    Q_OBJECT
+public:
+    Car();
+    QRectF boundingRect() const override;
+
+public slots:
+    void accelerate();
+    void decelerate();
+    void turnLeft();
+    void turnRight();
+
+protected:
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+               QWidget *widget = nullptr) override;
+    void timerEvent(QTimerEvent *event) override;
+
+private:
+    QBrush color = Qt::green;
+    qreal wheelsAngle = 0; // used when applying rotation
+    qreal speed = 0; // delta movement along the body axis
+};
+
+#endif // CAR_H

examples/dbus/remotecontrolledcar/car/car.pro

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+QT += dbus widgets
+
+DBUS_ADAPTORS += ../common/car.xml
+HEADERS += car.h
+SOURCES += car.cpp main.cpp
+
+CONFIG += no_batch  # work around QTBUG-96513
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/dbus/remotecontrolledcar/car
+INSTALLS += target

examples/dbus/remotecontrolledcar/car/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "car.h"
+#include "car_adaptor.h"
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QGraphicsView>
+#include <QtWidgets/QGraphicsScene>
+#include <QtDBus/QDBusConnection>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QGraphicsScene scene;
+    scene.setSceneRect(-500, -500, 1000, 1000);
+    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
+
+    auto car = new Car();
+    scene.addItem(car);
+
+    QGraphicsView view(&scene);
+    view.setRenderHint(QPainter::Antialiasing);
+    view.setBackgroundBrush(Qt::darkGray);
+    view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Qt DBus Controlled Car"));
+    view.resize(400, 300);
+    view.show();
+
+    new CarInterfaceAdaptor(car);
+    auto connection = QDBusConnection::sessionBus();
+    connection.registerObject("/Car", car);
+    connection.registerService("org.example.CarExample");
+
+    return app.exec();
+}