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     2 **

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

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtGui module of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "qaccessible.h"

    43 #include "qaccessiblebridge.h"

    44 

    45 #ifndef QT_NO_ACCESSIBILITY

    46 

    47 #include "qcoreapplication.h"

    48 #include "qmutex.h"

    49 #include "qvector.h"

    50 #include "private/qfactoryloader_p.h"

    51 

    52 #include <stdlib.h>

    53 

    54 QT_BEGIN_NAMESPACE

    55 

    56 #ifndef QT_NO_LIBRARY

    57 Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,

    58     (QAccessibleBridgeFactoryInterface_iid, QLatin1String("/accessiblebridge")))

    59 #endif

    60 Q_GLOBAL_STATIC(QVector<QAccessibleBridge *>, bridges)

    61 static bool isInit = false;

    62 

    63 void QAccessible::initialize()

    64 {

    65     if (isInit)

    66         return;

    67     isInit = true;

    68 

    69     if (qgetenv("QT_ACCESSIBILITY") != "1")

    70         return;

    71 #ifndef QT_NO_LIBRARY

    72     const QStringList l = loader()->keys();

    73     for (int i = 0; i < l.count(); ++i) {

    74         if (QAccessibleBridgeFactoryInterface *factory =

    75                 qobject_cast<QAccessibleBridgeFactoryInterface*>(loader()->instance(l.at(i)))) {

    76             QAccessibleBridge * bridge = factory->create(l.at(i));

    77             if (bridge)

    78                 bridges()->append(bridge);

    79         }

    80     }

    81 #endif

    82 }

    83 

    84 void QAccessible::cleanup()

    85 {

    86     qDeleteAll(*bridges());

    87 }

    88 

    89 void QAccessible::updateAccessibility(QObject *o, int who, Event reason)

    90 {

    91     Q_ASSERT(o);

    92 

    93     if (updateHandler) {

    94         updateHandler(o, who, reason);

    95         return;

    96     }

    97 

    98     initialize();

    99     if (bridges()->isEmpty())

   100         return;

   101 

   102     QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(o);

   103     if (!iface)

   104         return;

   105 

   106     for (int i = 0; i < bridges()->count(); ++i)

   107         bridges()->at(i)->notifyAccessibilityUpdate(reason, iface, who);

   108     delete iface;

   109 }

   110 

   111 void QAccessible::setRootObject(QObject *o)

   112 {

   113     if (rootObjectHandler) {

   114         rootObjectHandler(o);

   115         return;

   116     }

   117 

   118     initialize();

   119     if (bridges()->isEmpty())

   120         return;

   121 

   122     if (!o)

   123         return;

   124 

   125     for (int i = 0; i < bridges()->count(); ++i) {

   126         QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(o);

   127         bridges()->at(i)->setRootObject(iface);

   128     }

   129 }

   130 

   131 QT_END_NAMESPACE

   132 

   133 #endif // QT_NO_ACCESSIBILITY

   134