QML Image: Failed to get image from provider

[mismael85]

Hi everybody,

I have a problem when importing images from C++ into QML

QML Image: Failed to get image from provider

//main.cpp

QmlApplicationViewer viewer;
    QDeclarativeEngine * engine = viewer.engine();
    engine->addImageProvider(QLatin1String("thumbnail"), new ContactsImageProvider);

QmlApplicationViewer viewer;
    QDeclarativeEngine * engine = viewer.engine();
    engine->addImageProvider(QLatin1String("thumbnail"), new ContactsImageProvider);

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//QML delegate file

Image {
        id: personPhoto
 
        height: 75
        width: 75
        source: "image://thumbnail/" + contactId
        anchors.left: parent.left
    }

Image {
        id: personPhoto

        height: 75
        width: 75
        source: "image://thumbnail/" + contactId
        anchors.left: parent.left
    }

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//ContactsImageProvider

ContactsImageProvider::ContactsImageProvider()
    :QDeclarativeImageProvider(QDeclarativeImageProvider::Image)
{
    m_contactsManager = new QContactManager;
}
 
ContactsImageProvider::~ContactsImageProvider()
{
    delete m_contactsManager;
}
 
QImage ContactsImageProvider::requestImage(const QString& id, QSize* size, const QSize& requestedSize)
{
    QContact contact = m_contactsManager->contact(id.toUInt());
    QContactThumbnail thumb = contact.detail(QContactThumbnail::DefinitionName);
    QImage thumbnail = thumb.thumbnail();
    if(!thumbnail.isNull())
    {
        return thumbnail;
    }
    return QImage();
}

ContactsImageProvider::ContactsImageProvider()
    :QDeclarativeImageProvider(QDeclarativeImageProvider::Image)
{
    m_contactsManager = new QContactManager;
}

ContactsImageProvider::~ContactsImageProvider()
{
    delete m_contactsManager;
}

QImage ContactsImageProvider::requestImage(const QString& id, QSize* size, const QSize& requestedSize)
{
    QContact contact = m_contactsManager->contact(id.toUInt());
    QContactThumbnail thumb = contact.detail(QContactThumbnail::DefinitionName);
    QImage thumbnail = thumb.thumbnail();
    if(!thumbnail.isNull())
    {
        return thumbnail;
    }
    return QImage();
}

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I always got the following error

QML Image: Failed to get image from provider

is there a solution?

[awfan]

may be id ==-1? when item is invisible.