Qt 5.9 | Qt Multimedia | QML Video Shader Effects Example | qmlapplicationviewer.cpp Example File

Qt 5.9.4 Reference Documentation

# qmlapplicationviewer.cpp Example File

multimedia/video/qmlvideofx/qmlapplicationviewer/qmlapplicationviewer.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Mobility Components.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** 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
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #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(), SIGNAL(quit()), QCoreApplication::instance(), SLOT(quit()));
          setResizeMode(QQuickView::SizeRootObjectToView);
      }

      QmlApplicationViewer::QmlApplicationViewer(QQuickView *view, QWindow *parent)
          : QQuickView(parent)
          , d(new QmlApplicationViewerPrivate(view))
      {
          connect(view->engine(), SIGNAL(quit()), QCoreApplication::instance(), SLOT(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);
      }