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# mainwindow.cpp Example File
demos/chip/mainwindow.cpp

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     ** This file is part of the documentation of the Qt Toolkit.
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     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
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     #include "mainwindow.h"
     #include "view.h"
     #include "chip.h"

     #include <QtGui>

     MainWindow::MainWindow(QWidget *parent)
         : QWidget(parent)
     {
         populateScene();

         h1Splitter = new QSplitter;
         h2Splitter = new QSplitter;

         QSplitter *vSplitter = new QSplitter;
         vSplitter->setOrientation(Qt::Vertical);
         vSplitter->addWidget(h1Splitter);
         vSplitter->addWidget(h2Splitter);

         View *view = new View("Top left view");
         view->view()->setScene(scene);
         h1Splitter->addWidget(view);

         view = new View("Top right view");
         view->view()->setScene(scene);
         h1Splitter->addWidget(view);

         view = new View("Bottom left view");
         view->view()->setScene(scene);
         h2Splitter->addWidget(view);

         view = new View("Bottom right view");
         view->view()->setScene(scene);
         h2Splitter->addWidget(view);

         QHBoxLayout *layout = new QHBoxLayout;
         layout->addWidget(vSplitter);
         setLayout(layout);

         setWindowTitle(tr("Chip Demo"));
     }

     void MainWindow::populateScene()
     {
         scene = new QGraphicsScene;

         QImage image(":/qt4logo.png");

         // Populate scene
         int xx = 0;
         int nitems = 0;
         for (int i = -11000; i < 11000; i += 110) {
             ++xx;
             int yy = 0;
             for (int j = -7000; j < 7000; j += 70) {
                 ++yy;
                 qreal x = (i + 11000) / 22000.0;
                 qreal y = (j + 7000) / 14000.0;

                 QColor color(image.pixel(int(image.width() * x), int(image.height() * y)));
                 QGraphicsItem *item = new Chip(color, xx, yy);
                 item->setPos(QPointF(i, j));
                 scene->addItem(item);

                 ++nitems;
             }
         }
     }