- Qt 5.5
- Qt Multimedia
- QML Video Shader Effects Example
- qmlapplicationviewer.cpp Example File
- Qt 5.5.1 Reference Documentation

# qmlapplicationviewer.cpp Example File

video/qmlvideofx/qmlapplicationviewer/qmlapplicationviewer.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the Qt Mobility Components.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** 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 http://www.qt.io/terms-conditions. For further
    ** information use the contact form at http://www.qt.io/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** As a special exception, The Qt Company gives you certain additional
    ** rights. These rights are described in The Qt Company LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #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);
    }