/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include <qservicemanager.h>

#include <qservicefilter.h>

#include <qserviceinterfacedescriptor.h>

#include <QGraphicsWidget>

#include "hshostedwidgetfactory.h"

QTM_USE_NAMESPACE

/*!

    \class HsWidgetFactory

    \ingroup group_hsdomainmodel

    \brief Each widget is controlled by the home screen framework through a widget host.

*/

struct HsHostedWidgetFactoryImpl{

    QServiceManager mServiceManager;

    QServiceFilter mFilter;

};

HsHostedWidgetFactory *HsHostedWidgetFactory::mInstance = 0;

HsHostedWidgetFactory *HsHostedWidgetFactory::instance()

{

    if (!mInstance) {

        mInstance = new HsHostedWidgetFactory;

    }

    return mInstance;

}

HsHostedWidgetFactory *HsHostedWidgetFactory::takeInstance()

{

    HsHostedWidgetFactory *instance = mInstance;

    mInstance = 0;

    return instance;

}

HsHostedWidgetFactory *HsHostedWidgetFactory::setInstance

                                             (HsHostedWidgetFactory *instance)

{

    HsHostedWidgetFactory *old = mInstance;

    if (mInstance != instance) {

        mInstance = instance;

    }

    return old;

}

QObject *HsHostedWidgetFactory::createWidget(const QString &uri)

{

    mImpl->mFilter.setServiceName(uri);

    QList<QServiceInterfaceDescriptor> interfaces = 

        mImpl->mServiceManager.findInterfaces(mImpl->mFilter);

    if (interfaces.isEmpty()) {

        return 0;

    }

    // In theory we support QGraphicsWidget derived widgets

    QObject *widgetObject = mImpl->mServiceManager.loadInterface(interfaces.first());

    if (!qobject_cast<QGraphicsWidget *>(widgetObject)) {

        delete widgetObject;

        widgetObject = 0;

    }

    return widgetObject;

}

/*!

    Constructs a new widget host with given \a databaseId and

    \a parent item.

*/

HsHostedWidgetFactory::HsHostedWidgetFactory(QObject *parent)

  : QObject(parent),

    mImpl(new HsHostedWidgetFactoryImpl)

{

    mImpl->mFilter.setInterface("com.nokia.symbian.IHomeScreenWidget");

}

/*!

    Destructor.

*/

HsHostedWidgetFactory::~HsHostedWidgetFactory()

{

    delete mImpl;

}