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);
 }