- Enginio Manual
- Enginio C++ Classes and Examples
- Enginio C++ Examples - Image Gallery
- imageobject.cpp Example File
- Enginio 1.2.1 Reference Documentation

# imageobject.cpp Example File

image-gallery-cpp/imageobject.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
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    #include "imageobject.h"

    #include <QtNetwork>
    #include <Enginio/enginioclient.h>
    #include <Enginio/enginioreply.h>

    ImageObject::ImageObject(EnginioClient *enginio)
        : m_enginio(enginio)
    {}

    void ImageObject::setObject(const QJsonObject &object)
    {
        m_object = object;
        QString fileId;
        fileId = object.value("file").toObject().value("id").toString();

        if (!fileId.isEmpty()) {
            QJsonObject fileObject;
            fileObject.insert("id", fileId);
            fileObject.insert("variant", QString("thumbnail"));
            EnginioReply *reply = m_enginio->downloadUrl(fileObject);
            connect(reply, SIGNAL(finished(EnginioReply*)), this, SLOT(replyFinished(EnginioReply*)));
        } else {
            // Try to fall back to the local file
            QString localPath = object.value("localPath").toString();
            if (QFile::exists(localPath)) {
                m_image = QImage(localPath);
                emit imageChanged(object.value("id").toString());
            }
        }
    }

    void ImageObject::replyFinished(EnginioReply *enginioReply)
    {
        QString url = enginioReply->data().value("expiringUrl").toString();
        QNetworkRequest request(url);
        m_reply = m_enginio->networkManager()->get(request);
        m_reply->setParent(this);
        connect(m_reply, SIGNAL(finished()), this, SLOT(downloadFinished()));
    }

    void ImageObject::downloadFinished()
    {
        QByteArray imageData = m_reply->readAll();
        m_image.loadFromData(imageData);
        emit imageChanged(m_object.value("id").toString());

        m_reply->deleteLater();
        m_reply = 0;
    }

    QPixmap ImageObject::thumbnail()
    {
        if (m_image.isNull() || !m_thumbnail.size().isNull())
            return m_thumbnail;
        m_thumbnail = QPixmap::fromImage(m_image.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation));
        return m_thumbnail;
    }