Qt 4.8: main.cpp Example File (graphicsview/dragdroprobot/main.cpp)

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# main.cpp Example File

graphicsview/dragdroprobot/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** 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 Digia Plc 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 <QtGui>

     #include "coloritem.h"
     #include "robot.h"

     #include <math.h>

     class GraphicsView : public QGraphicsView
     {
     public:
         GraphicsView(QGraphicsScene *scene) : QGraphicsView(scene)
         {
         }

     protected:
         virtual void resizeEvent(QResizeEvent *event)
         {
     #if defined(Q_OS_SYMBIAN)
             fitInView(sceneRect(), Qt::KeepAspectRatio);
     #endif
         }
     };

     int main(int argc, char **argv)
     {
         QApplication app(argc, argv);

         qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
         QGraphicsScene scene(-200, -200, 400, 400);

         for (int i = 0; i < 10; ++i) {
             ColorItem *item = new ColorItem;
             item->setPos(::sin((i * 6.28) / 10.0) * 150,
                          ::cos((i * 6.28) / 10.0) * 150);

             scene.addItem(item);
         }

         Robot *robot = new Robot;
         robot->scale(1.2, 1.2);
         robot->setPos(0, -20);
         scene.addItem(robot);
         GraphicsView view(&scene);
         view.setRenderHint(QPainter::Antialiasing);
         view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
         view.setBackgroundBrush(QColor(230, 200, 167));
         view.setWindowTitle("Drag and Drop Robot");
     #if defined(Q_OS_SYMBIAN)
         view.showMaximized();
     #else
          view.show();
     #endif

         return app.exec();
     }