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imageprovider.cpp Example File
qmlcontacts/imageprovider.cpp

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    #include <qdeclarativeextensionplugin.h>

    #include <qdeclarativeengine.h>
    #include <qdeclarative.h>
    #include <qcontactmanager.h>
    #include <qcontactdetails.h>
    #include "imageprovider.h"

    QTM_USE_NAMESPACE

    // This is run in a low priority thread.
    QImage ContactThumbnailImageProvider::request(const QString &id, QSize *size, const QSize &req_size)
    {
        if (m_thumbnails.contains(id)) {
            if (size)
                *size = req_size;
            return m_thumbnails.value(id).scaled(req_size);
        }

        /* url format:
            image://thumbnail/{manager.contactid}
         */

        QString managerName = id.split('.').first();
        QString localId = id.split('.').last();

        QContactManager* manager = 0;
        if (m_managers.contains(managerName)) {
            manager = m_managers.value(managerName);
        } else {
            manager = new QContactManager(managerName);
            m_managers.insert(managerName, manager);
        }

        QContact c = manager->contact(localId.toInt());

        QImage image(
                req_size.width() > 0 ? req_size.width() : 100,
                req_size.height() > 0 ? req_size.height() : 50,
                QImage::Format_RGB32);

        QContactThumbnail t = c.detail<QContactThumbnail>();
        if (!t.thumbnail().isNull()) {
            image = t.thumbnail().scaled(image.size());
        } else {
            QContactAvatar a = c.detail<QContactAvatar>();
            QString imageUrl = a.imageUrl().isEmpty()? QString::fromLatin1("contents/default.svg") : a.imageUrl().toString();
            image.load(imageUrl);
        }

        if (size)
            *size = image.size();

        m_thumbnails.insert(id, image);

        return image;
    }

    ContactThumbnailImageProvider::~ContactThumbnailImageProvider()
    {
        foreach(const QString& name, m_managers.keys()) {
            delete m_managers.value(name);
        }

        m_managers.clear();
    }


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Qt Mobility Project 1.0.2