winaccessibility/source/service/AccTreeEventListener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <com/sun/star/accessibility/XAccessible.hpp>
  21 #include <com/sun/star/accessibility/AccessibleStateType.hpp>
  22 #include <com/sun/star/accessibility/AccessibleEventId.hpp>
  23 #include <com/sun/star/accessibility/AccessibleRole.hpp>
  24 #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
  25
  26 #include <vcl/svapp.hxx>
  27
  28 #include <AccTreeEventListener.hxx>
  29 #include <AccObjectWinManager.hxx>
  30 #include <unomsaaevent.hxx>
  31
  32 using namespace com::sun::star::uno;
  33 using namespace com::sun::star::accessibility;
  34
  35 AccTreeEventListener::AccTreeEventListener(css::accessibility::XAccessible* pAcc, AccObjectWinManager& rManager)
  36         :AccDescendantManagerEventListener(pAcc, rManager)
  37 {}
  38 AccTreeEventListener::~AccTreeEventListener()
  39 {
  40 }
  41
  42 /**
  43  *  Uno's event notifier when event is captured
  44  *  @param AccessibleEventObject    the event object which contains information about event
  45  */
  46 void  AccTreeEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent )
  47 {
  48     SolarMutexGuard g;
  49
  50     switch (aEvent.EventId)
  51     {
  52     case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
  53         HandleActiveDescendantChangedEvent(aEvent.OldValue, aEvent.NewValue);
  54         break;
  55     default:
  56         AccDescendantManagerEventListener::notifyEvent(aEvent);
  57         break;
  58     }
  59 }
  60
  61 /**
  62  *  handle the ACTIVE_DESCENDANT_CHANGED event
  63  *  @param  oldValue    the child to lose active
  64  *  @param  newValue    the child to get active
  65  */
  66 void AccTreeEventListener::HandleActiveDescendantChangedEvent(Any oldValue, Any newValue)
  67 {
  68     Reference< XAccessible > xChild;
  69     if(newValue >>= xChild )
  70     {
  71         if(xChild.is())
  72         {
  73             XAccessible* pAcc = xChild.get();
  74             m_rObjManager.InsertAccObj(pAcc, m_xAccessible.get());
  75             m_rObjManager.NotifyAccEvent(pAcc, UnoMSAAEvent::ACTIVE_DESCENDANT_CHANGED);
  76         }
  77     }
  78     if (oldValue >>= xChild)
  79     {
  80         //delete an existing child
  81         if(xChild.is())
  82         {
  83             XAccessible* pAcc = xChild.get();
  84             m_rObjManager.DeleteAccObj(pAcc);
  85         }
  86     }
  87
  88 }
  89
  90 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */