- Qt 5.5
- Qt Widgets
- 40000 Chips
- mainwindow.cpp Example File
- Qt 5.5.1 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.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
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    ** information use the contact form at http://www.qt.io/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
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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;
            }
        }
    }