qmlapplicationviewer.cpp Example File

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  #include "qmlapplicationviewer.h"

  #include <QtCore/QDir>
  #include <QtCore/QFileInfo>
  #include <QtQml/QQmlComponent>
  #include <QtQml/QQmlEngine>
  #include <QtQml/QQmlContext>
  #include <QtGui/QGuiApplication>

  class QmlApplicationViewerPrivate
  {
      QmlApplicationViewerPrivate(QQuickView *view_) : view(view_) {}

      QString mainQmlFile;
      QQuickView *view;
      friend class QmlApplicationViewer;
      QString adjustPath(const QString &path);
  };

  QString QmlApplicationViewerPrivate::adjustPath(const QString &path)
  {
  #ifdef Q_OS_UNIX
  #ifdef Q_OS_MAC
      if (!QDir::isAbsolutePath(path))
          return QCoreApplication::applicationDirPath()
                  + QLatin1String("/../Resources/") + path;
  #else
      QString pathInInstallDir;
      const QString applicationDirPath = QCoreApplication::applicationDirPath();
      pathInInstallDir = QString::fromLatin1("%1/../%2").arg(applicationDirPath, path);

      if (QFileInfo(pathInInstallDir).exists())
          return pathInInstallDir;
  #endif
  #endif
      return path;
  }

  QmlApplicationViewer::QmlApplicationViewer(QWindow *parent)
      : QQuickView(parent)
      , d(new QmlApplicationViewerPrivate(this))
  {
      connect(engine(), &QQmlEngine::quit, QCoreApplication::instance(), &QCoreApplication::quit);
      setResizeMode(QQuickView::SizeRootObjectToView);
  }

  QmlApplicationViewer::QmlApplicationViewer(QQuickView *view, QWindow *parent)
      : QQuickView(parent)
      , d(new QmlApplicationViewerPrivate(view))
  {
      connect(view->engine(), &QQmlEngine::quit, QCoreApplication::instance(), &QCoreApplication::quit);
      view->setResizeMode(QQuickView::SizeRootObjectToView);
  }

  QmlApplicationViewer::~QmlApplicationViewer()
  {
      delete d;
  }

  QmlApplicationViewer *QmlApplicationViewer::create()
  {
      return new QmlApplicationViewer();
  }

  void QmlApplicationViewer::setMainQmlFile(const QString &file)
  {
      d->mainQmlFile = d->adjustPath(file);
      d->view->setSource(QUrl::fromLocalFile(d->mainQmlFile));
  }

  void QmlApplicationViewer::addImportPath(const QString &path)
  {
      d->view->engine()->addImportPath(d->adjustPath(path));
  }

  void QmlApplicationViewer::showExpanded()
  {
  #if defined(Q_WS_SIMULATOR)
      d->view->showFullScreen();
  #else
      d->view->show();
  #endif
  }

  QGuiApplication *createApplication(int &argc, char **argv)
  {
      return new QGuiApplication(argc, argv);
  }