main.cpp Example File | Qt Data Visualization 5.9

Qt 5.9 | Qt Data Visualization | Qt Quick 2 Oscilloscope Example | main.cpp Example File

Qt 5.9.4 Reference Documentation

# main.cpp Example File

qmloscilloscope/main.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Data Visualization module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
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      ** Alternatively, this file may be used under the terms of the GNU
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      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
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      #include "datasource.h"

      #include <QtDataVisualization/qutils.h>

      #include <QtGui/QGuiApplication>
      #include <QtCore/QDir>
      #include <QtQml/QQmlContext>
      #include <QtQuick/QQuickView>
      #include <QtQml/QQmlEngine>

      int main(int argc, char *argv[])
      {
          QGuiApplication app(argc, argv);

          QQuickView viewer;

          // Enable antialiasing in direct rendering mode
          viewer.setFormat(QtDataVisualization::qDefaultSurfaceFormat());

          // The following are needed to make examples run without having to install the module
          // in desktop environments.
      #ifdef Q_OS_WIN
          QString extraImportPath(QStringLiteral("%1/../../../../%2"));
      #else
          QString extraImportPath(QStringLiteral("%1/../../../%2"));
      #endif
          viewer.engine()->addImportPath(extraImportPath.arg(QGuiApplication::applicationDirPath(),
                                            QString::fromLatin1("qml")));
          QObject::connect(viewer.engine(), &QQmlEngine::quit, &viewer, &QWindow::close);

          viewer.setTitle(QStringLiteral("Oscilloscope example"));

          DataSource dataSource;
          viewer.rootContext()->setContextProperty("dataSource", &dataSource);

          viewer.setSource(QUrl("qrc:/qml/qmloscilloscope/main.qml"));
          viewer.setResizeMode(QQuickView::SizeRootObjectToView);
          viewer.show();

          return app.exec();
      }