winaccessibility/source/service/AccWindowEventListener.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 "AccWindowEventListener.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 AccWindowEventListener::AccWindowEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
  36         :AccEventListener(pAcc, Agent)
  37 {}
  38 AccWindowEventListener::~AccWindowEventListener()
  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  AccWindowEventListener::notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException)
  47 {
  48     SolarMutexGuard g;
  49
  50     switch (aEvent.EventId)
  51     {
  52     case AccessibleEventId::CHILD:
  53         HandleChildChangedEvent(aEvent.OldValue, aEvent.NewValue);
  54         break;
  55     case AccessibleEventId::VISIBLE_DATA_CHANGED:
  56         HandleVisibleDataChangedEvent();
  57         break;
  58     case AccessibleEventId::BOUNDRECT_CHANGED:
  59         HandleBoundrectChangedEvent();
  60         break;
  61     default:
  62         AccEventListener::notifyEvent(aEvent);
  63         break;
  64     }
  65 }
  66
  67 /**
  68  *  handle the CHILD event
  69  *  @param  oldValue    the child to be deleted
  70  *  @param  newValue    the child to be added
  71  */
  72 void AccWindowEventListener::HandleChildChangedEvent(Any oldValue, Any newValue)
  73 {
  74     Reference< XAccessible > xChild;
  75     if( newValue >>= xChild)
  76     {
  77         //create a new child
  78         if(xChild.is())
  79         {
  80             XAccessible* pAcc = xChild.get();
  81             //add this child
  82             pAgent->InsertAccObj(pAcc, m_xAccessible.get());
  83             //add all oldValue's existing children
  84             pAgent->InsertChildrenAccObj(pAcc);
  85             pAgent->NotifyAccEvent(UM_EVENT_CHILD_ADDED, pAcc);
  86         }
  87         else
  88         {}
  89     }
  90     else if (oldValue >>= xChild)
  91     {
  92         //delete a existing child
  93         if(xChild.is())
  94         {
  95             XAccessible* pAcc = xChild.get();
  96             pAgent->NotifyAccEvent(UM_EVENT_CHILD_REMOVED, pAcc);
  97             pAgent->DeleteChildrenAccObj( pAcc );
  98             //delete this child
  99             pAgent->DeleteAccObj( pAcc );
 100         }
 101         else
 102         {}
 103     }
 104 }
 105
 106 /**
 107  *  set the new state and fire the MSAA event
 108  *  @param state    new state id
 109  *  @param enable   true if state is set, false if state is unset
 110  */
 111 void AccWindowEventListener::SetComponentState(short state, bool enable )
 112 {
 113     // only the following state can be fired state event.
 114     switch (state)
 115     {
 116     case AccessibleStateType::ICONIFIED:
 117         // no msaa state
 118         break;
 119     case AccessibleStateType::VISIBLE:
 120         // UNO !VISIBLE == MSAA INVISIBLE
 121         if( enable )
 122             pAgent->IncreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 123         else
 124             pAgent->DecreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 125         break;
 126     case AccessibleStateType::SHOWING:
 127         // UNO !SHOWING == MSAA OFFSCREEN
 128         if( enable )
 129         {
 130             pAgent->IncreaseState(m_xAccessible.get(), AccessibleStateType::SHOWING);
 131         }
 132         else
 133             pAgent->DecreaseState(m_xAccessible.get(), AccessibleStateType::SHOWING);
 134         break;
 135     default:
 136         break;
 137     }
 138 }
 139
 140 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */