Qt 5.11 | Qt Multimedia | QML Video Shader Effects Example | qmlapplicationviewer.cpp Example File

Qt 5.11.3 Reference Documentation

# qmlapplicationviewer.cpp Example File

multimedia/video/qmlvideofx/qmlapplicationviewer/qmlapplicationviewer.cpp

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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);
      }