winaccessibility/source/service/AccListEventListener.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 <AccListEventListener.hxx>
  29 #include <AccObjectManagerAgent.hxx>
  30 #include <unomsaaevent.hxx>
  31
  32 using namespace com::sun::star::uno;
  33 using namespace com::sun::star::accessibility;
  34
  35 AccListEventListener::AccListEventListener(css::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
  36         :AccDescendantManagerEventListener(pAcc, Agent)
  37 {
  38 }
  39
  40 AccListEventListener::~AccListEventListener()
  41 {
  42 }
  43
  44 /**
  45  *  Uno's event notifier when event is captured
  46  *  @param AccessibleEventObject    the event object which contains information about event
  47  */
  48 void  AccListEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent )
  49 {
  50     SolarMutexGuard g;
  51
  52     switch (aEvent.EventId)
  53     {
  54     case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
  55         HandleActiveDescendantChangedEvent(aEvent.OldValue, aEvent.NewValue);
  56         break;
  57     case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
  58         // Since List items a transient a child events are mostly used
  59         // to attach/detach listeners, it is safe to ignore it here
  60         //TODO: investigate again
  61         break;
  62     case AccessibleEventId::VALUE_CHANGED:
  63         HandleValueChangedEvent(aEvent.OldValue, aEvent.NewValue);
  64         break;
  65     default:
  66         AccDescendantManagerEventListener::notifyEvent(aEvent);
  67         break;
  68     }
  69 }
  70
  71 /**
  72  *  handle the ACTIVE_DESCENDANT_CHANGED event
  73  *  @param  oldValue    the child to lose active
  74  *  @param  newValue    the child to get active
  75  */
  76 void AccListEventListener::HandleActiveDescendantChangedEvent(Any oldValue, Any newValue)
  77 {
  78     Reference< XAccessible > xChild;
  79
  80     if(newValue >>= xChild )
  81     {
  82         if(xChild.is())
  83         {
  84             XAccessible* pAcc = xChild.get();
  85
  86             // Valueset has cache the child item xacc,Update state if no insert obj
  87             bool bHasCache = pAgent->InsertAccObj(pAcc, m_xAccessible.get());
  88             if (!bHasCache)
  89             {
  90                 pAgent->UpdateState(pAcc);
  91             }
  92
  93             pAgent->IncreaseState( pAcc, AccessibleStateType::FOCUSED);
  94
  95             pAgent->NotifyAccEvent(UM_EVENT_ACTIVE_DESCENDANT_CHANGED, pAcc);
  96         }
  97     }
  98     if (oldValue >>= xChild)
  99     {
 100         if(xChild.is())
 101         {
 102             XAccessible* pAcc = xChild.get();
 103             pAgent->DeleteAccObj( pAcc );
 104         }
 105     }
 106 }
 107
 108 /**
 109  * handle the VALUE_CHANGED event
 110  *
 111  * @param   oldValue    the old value of the source of event
 112  * @param   newValue    the new value of the source of event
 113  */
 114 void AccListEventListener::HandleValueChangedEvent(Any, Any)
 115 {
 116     //to enable value changed event
 117     if (GetParentRole() == AccessibleRole::COMBO_BOX)
 118     {
 119         XAccessible* pParentAcc =
 120             pAgent->GetParentXAccessible(m_xAccessible.get());
 121         pAgent->UpdateValue(pParentAcc);
 122         pAgent->NotifyAccEvent(UM_EVENT_OBJECT_VALUECHANGE, pParentAcc);
 123     }
 124 }
 125
 126 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */