1 files changed, 137 insertions, 0 deletions
diff --git a/examples/dbus/remotecontrolledcar/car/car.cpp b/examples/dbus/remotecontrolledcar/car/car.cpp
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+++ b/examples/dbus/remotecontrolledcar/car/car.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "car.h"
+#include <QtGui/QtGui>
+#include <math.h>
+
+static const double Pi = 3.14159265358979323846264338327950288419717;
+
+QRectF Car::boundingRect() const
+{
+    return QRectF(-35, -81, 70, 115);
+}
+
+Car::Car() : color(Qt::green), wheelsAngle(0), speed(0)
+{
+    startTimer(1000 / 33);
+    setFlag(QGraphicsItem::ItemIsMovable, true);
+    setFlag(QGraphicsItem::ItemIsFocusable, true);
+}
+
+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 = (wheelsAngle * Pi) / 180;
+    qreal turnDistance = ::cos(wheelsAngleRads) * axelDistance * 2;
+    qreal turnRateRads = wheelsAngleRads / turnDistance;  // rough estimate
+    qreal turnRate = (turnRateRads * 180) / Pi;
+    qreal rotation = speed * turnRate;
+    
+    rotate(rotation);
+    translate(0, -speed);
+    update();
+}