1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 

    19 

    20 #include <qservicemanager.h>

    21 #include <qservicefilter.h>

    22 #include <qserviceinterfacedescriptor.h>

    23 #include <QGraphicsWidget>

    24 #include "hshostedwidgetfactory.h"

    25 

    26 QTM_USE_NAMESPACE

    27 

    28 /*!

    29     \class HsWidgetFactory

    30     \ingroup group_hsdomainmodel

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

    32 */

    33 

    34 

    35 struct HsHostedWidgetFactoryImpl{

    36     QServiceManager mServiceManager;

    37     QServiceFilter mFilter;

    38 };

    39 

    40 

    41 

    42 HsHostedWidgetFactory *HsHostedWidgetFactory::mInstance = 0;

    43 

    44 HsHostedWidgetFactory *HsHostedWidgetFactory::instance()

    45 {

    46     if (!mInstance) {

    47         mInstance = new HsHostedWidgetFactory;

    48     }

    49     return mInstance;

    50 }

    51 

    52 HsHostedWidgetFactory *HsHostedWidgetFactory::takeInstance()

    53 {

    54     HsHostedWidgetFactory *instance = mInstance;

    55     mInstance = 0;

    56     return instance;

    57 }

    58 

    59 HsHostedWidgetFactory *HsHostedWidgetFactory::setInstance

    60                                              (HsHostedWidgetFactory *instance)

    61 {

    62     HsHostedWidgetFactory *old = mInstance;

    63     if (mInstance != instance) {

    64         mInstance = instance;

    65     }

    66     return old;

    67 }

    68 

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

    70 {

    71     mImpl->mFilter.setServiceName(uri);

    72     QList<QServiceInterfaceDescriptor> interfaces = 

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

    74     

    75     if (interfaces.isEmpty()) {

    76         return 0;

    77     }

    78     // In theory we support QGraphicsWidget derived widgets

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

    80     

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

    82         delete widgetObject;

    83         widgetObject = 0;

    84     }

    85     return widgetObject;

    86 }

    87 

    88 /*!

    89     Constructs a new widget host with given \a databaseId and

    90     \a parent item.

    91 */

    92 HsHostedWidgetFactory::HsHostedWidgetFactory(QObject *parent)

    93   : QObject(parent),

    94     mImpl(new HsHostedWidgetFactoryImpl)

    95 {

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

    97 }

    98 

    99 /*!

   100     Destructor.

   101 */

   102 HsHostedWidgetFactory::~HsHostedWidgetFactory()

   103 {

   104     delete mImpl;

   105 }

   106