Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "controller.h"
++ #include <QGridLayout>
++ #include <QHBoxLayout>
++
++ using org::example::Examples::CarInterface;
++
++ Controller::Controller(QWidget *parent) : QWidget(parent)
++ {
++ car = new CarInterface("org.example.CarExample", "/Car", QDBusConnection::sessionBus(), this);
++
++ accelerate = new QPushButton(QIcon(":up.svg"), "", this);
++ accelerate->setFixedSize(80, 64);
++ accelerate->setIconSize(QSize(44, 44));
++ decelerate = new QPushButton(QIcon(":down.svg"), "", this);
++ decelerate->setFixedSize(80, 64);
++ decelerate->setIconSize(QSize(44, 44));
++ left = new QPushButton(QIcon(":left.svg"), "", this);
++ left->setFixedSize(64, 80);
++ left->setIconSize(QSize(44, 44));
++ right = new QPushButton(QIcon(":right.svg"), "", this);
++ right->setFixedSize(64, 80);
++ right->setIconSize(QSize(44, 44));
++
++ status = new QLabel(this);
++ statusSymbol = new QLabel(this);
++ statusSymbol->setFixedHeight(24);
++
++ QGridLayout *layout = new QGridLayout(this);
++ layout->addWidget(accelerate, 1, 1);
++ layout->addWidget(left, 2, 0);
++ layout->addWidget(right, 2, 2);
++ layout->addWidget(decelerate, 3, 1);
++
++ QHBoxLayout *statusLayout = new QHBoxLayout();
++ statusLayout->addWidget(status);
++ statusLayout->addWidget(statusSymbol);
++ layout->addLayout(statusLayout, 0, 1, 1, 2, Qt::AlignTop | Qt::AlignRight);
++
++ connect(accelerate, &QPushButton::clicked, car, &CarInterface::accelerate);
++ connect(decelerate, &QPushButton::clicked, car, &CarInterface::decelerate);
++ connect(left, &QPushButton::clicked, car, &CarInterface::turnLeft);
++ connect(right, &QPushButton::clicked, car, &CarInterface::turnRight);
++
++ startTimer(1000);
++ }
++
++ void Controller::timerEvent(QTimerEvent *event)
++ {
++ Q_UNUSED(event);
++
++ static QPixmap connectedIcon = QPixmap::fromImage(QImage(":connected.svg"));
++ static QPixmap connectingIcon = QPixmap::fromImage(QImage(":connecting.svg"));
++ status->setText(car->isValid() ? tr("connected") : tr("searching..."));
++ statusSymbol->setPixmap(car->isValid() ? connectedIcon : connectingIcon);
++ }