Qt 5.6 | Qt Widgets | 40000 Chips | mainwindow.cpp Example File

Qt 5.6.2 Reference Documentation

# mainwindow.cpp Example File

graphicsview/chip/mainwindow.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      #include "chip.h"
      #include "mainwindow.h"
      #include "view.h"

      #include <QHBoxLayout>
      #include <QSplitter>

      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 Example"));
      }

      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;
              }
          }
      }