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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 ** $QT_BEGIN_LICENSE:LGPL$

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    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

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

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    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 static OSStatus applicationEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data);

    43 static EventHandlerUPP applicationEventHandlerUPP = 0;

    44 static EventTypeSpec application_events[] = {

    45     { kEventClassAccessibility,  kEventAccessibleGetChildAtPoint },

    46     { kEventClassAccessibility,  kEventAccessibleGetNamedAttribute }

    47 };

    48 

    49 static CFStringRef kObjectQtAccessibility = CFSTR("com.trolltech.qt.accessibility");

    50 static EventHandlerUPP objectCreateEventHandlerUPP = 0;

    51 static EventTypeSpec objectCreateEvents[] = {

    52     { kEventClassHIObject,  kEventHIObjectConstruct },

    53     { kEventClassHIObject,  kEventHIObjectInitialize },

    54     { kEventClassHIObject,  kEventHIObjectDestruct },

    55     { kEventClassHIObject,  kEventHIObjectPrintDebugInfo }

    56 };

    57 

    58 static OSStatus accessibilityEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data);

    59 static EventHandlerUPP accessibilityEventHandlerUPP = 0;

    60 static EventTypeSpec accessibilityEvents[] = {

    61     { kEventClassAccessibility,  kEventAccessibleGetChildAtPoint },

    62     { kEventClassAccessibility,  kEventAccessibleGetFocusedChild },

    63     { kEventClassAccessibility,  kEventAccessibleGetAllAttributeNames },

    64     { kEventClassAccessibility,  kEventAccessibleGetNamedAttribute },

    65     { kEventClassAccessibility,  kEventAccessibleSetNamedAttribute },

    66     { kEventClassAccessibility,  kEventAccessibleIsNamedAttributeSettable },

    67     { kEventClassAccessibility,  kEventAccessibleGetAllActionNames },

    68     { kEventClassAccessibility,  kEventAccessiblePerformNamedAction },

    69     { kEventClassAccessibility,  kEventAccessibleGetNamedActionDescription }

    70 };

    71 

    72 static void installAcessibilityEventHandler(HIObjectRef hiObject)

    73 {

    74     if (!accessibilityEventHandlerUPP)

    75         accessibilityEventHandlerUPP = NewEventHandlerUPP(accessibilityEventHandler);

    76 

    77     InstallHIObjectEventHandler(hiObject, accessibilityEventHandlerUPP,

    78                                         GetEventTypeCount(accessibilityEvents),

    79                                         accessibilityEvents, 0, 0);

    80 }

    81 

    82 static OSStatus objectCreateEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data)

    83 {

    84     Q_UNUSED(data)

    85     Q_UNUSED(event)

    86     Q_UNUSED(next_ref)

    87     return noErr;

    88 }

    89 

    90 static void registerQtAccessibilityHIObjectSubclass()

    91 {

    92     if (!objectCreateEventHandlerUPP)

    93         objectCreateEventHandlerUPP = NewEventHandlerUPP(objectCreateEventHandler);

    94     OSStatus err = HIObjectRegisterSubclass(kObjectQtAccessibility, 0, 0, objectCreateEventHandlerUPP,

    95                                          GetEventTypeCount(objectCreateEvents), objectCreateEvents, 0, 0);

    96     if (err && err != hiObjectClassExistsErr)

    97         qWarning("qaccessible_mac internal error: Could not register accessibility HIObject subclass");

    98 }

    99 

   100 static void installApplicationEventhandler()

   101 {

   102     if (!applicationEventHandlerUPP)

   103         applicationEventHandlerUPP = NewEventHandlerUPP(applicationEventHandler);

   104 

   105     OSStatus err = InstallApplicationEventHandler(applicationEventHandlerUPP,

   106                             GetEventTypeCount(application_events), application_events,

   107                             0, 0);

   108 

   109     if (err && err != eventHandlerAlreadyInstalledErr)

   110         qWarning("qaccessible_mac internal error: Could not install application accessibility event handler");

   111 }

   112 

   113 static void removeEventhandler(EventHandlerUPP eventHandler)

   114 {

   115     if (eventHandler) {

   116         DisposeEventHandlerUPP(eventHandler);

   117         eventHandler = 0;

   118     }

   119 }