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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
static OSStatus applicationEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data);
static EventHandlerUPP applicationEventHandlerUPP = 0;
static EventTypeSpec application_events[] = {
{ kEventClassAccessibility, kEventAccessibleGetChildAtPoint },
{ kEventClassAccessibility, kEventAccessibleGetNamedAttribute }
};
static CFStringRef kObjectQtAccessibility = CFSTR("com.trolltech.qt.accessibility");
static EventHandlerUPP objectCreateEventHandlerUPP = 0;
static EventTypeSpec objectCreateEvents[] = {
{ kEventClassHIObject, kEventHIObjectConstruct },
{ kEventClassHIObject, kEventHIObjectInitialize },
{ kEventClassHIObject, kEventHIObjectDestruct },
{ kEventClassHIObject, kEventHIObjectPrintDebugInfo }
};
static OSStatus accessibilityEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data);
static EventHandlerUPP accessibilityEventHandlerUPP = 0;
static EventTypeSpec accessibilityEvents[] = {
{ kEventClassAccessibility, kEventAccessibleGetChildAtPoint },
{ kEventClassAccessibility, kEventAccessibleGetFocusedChild },
{ kEventClassAccessibility, kEventAccessibleGetAllAttributeNames },
{ kEventClassAccessibility, kEventAccessibleGetNamedAttribute },
{ kEventClassAccessibility, kEventAccessibleSetNamedAttribute },
{ kEventClassAccessibility, kEventAccessibleIsNamedAttributeSettable },
{ kEventClassAccessibility, kEventAccessibleGetAllActionNames },
{ kEventClassAccessibility, kEventAccessiblePerformNamedAction },
{ kEventClassAccessibility, kEventAccessibleGetNamedActionDescription }
};
static void installAcessibilityEventHandler(HIObjectRef hiObject)
{
if (!accessibilityEventHandlerUPP)
accessibilityEventHandlerUPP = NewEventHandlerUPP(accessibilityEventHandler);
InstallHIObjectEventHandler(hiObject, accessibilityEventHandlerUPP,
GetEventTypeCount(accessibilityEvents),
accessibilityEvents, 0, 0);
}
static OSStatus objectCreateEventHandler(EventHandlerCallRef next_ref, EventRef event, void *data)
{
Q_UNUSED(data)
Q_UNUSED(event)
Q_UNUSED(next_ref)
return noErr;
}
static void registerQtAccessibilityHIObjectSubclass()
{
if (!objectCreateEventHandlerUPP)
objectCreateEventHandlerUPP = NewEventHandlerUPP(objectCreateEventHandler);
OSStatus err = HIObjectRegisterSubclass(kObjectQtAccessibility, 0, 0, objectCreateEventHandlerUPP,
GetEventTypeCount(objectCreateEvents), objectCreateEvents, 0, 0);
if (err && err != hiObjectClassExistsErr)
qWarning("qaccessible_mac internal error: Could not register accessibility HIObject subclass");
}
static void installApplicationEventhandler()
{
if (!applicationEventHandlerUPP)
applicationEventHandlerUPP = NewEventHandlerUPP(applicationEventHandler);
OSStatus err = InstallApplicationEventHandler(applicationEventHandlerUPP,
GetEventTypeCount(application_events), application_events,
0, 0);
if (err && err != eventHandlerAlreadyInstalledErr)
qWarning("qaccessible_mac internal error: Could not install application accessibility event handler");
}
static void removeEventhandler(EventHandlerUPP eventHandler)
{
if (eventHandler) {
DisposeEventHandlerUPP(eventHandler);
eventHandler = 0;
}
}
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