winaccessibility/source/service/AccFrameEventListener.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 <AccFrameEventListener.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 #include <vcl/window.hxx>
  36 #include <toolkit/awt/vclxwindow.hxx>
  37 #include <vcl/sysdata.hxx>
  38
  39 AccFrameEventListener::AccFrameEventListener(css::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
  40         :AccEventListener(pAcc, Agent)
  41 {
  42 }
  43
  44 AccFrameEventListener::~AccFrameEventListener()
  45 {
  46 }
  47
  48 /**
  49  *  Uno's event notifier when event is captured
  50  *  @param AccessibleEventObject    the event object which contains information about event
  51  */
  52 void  AccFrameEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent )
  53 {
  54     SolarMutexGuard g;
  55
  56     switch (aEvent.EventId)
  57     {
  58     case AccessibleEventId::CHILD:
  59         HandleChildChangedEvent(aEvent.OldValue, aEvent.NewValue);
  60         break;
  61     case AccessibleEventId::VISIBLE_DATA_CHANGED:
  62         HandleVisibleDataChangedEvent();
  63         break;
  64     case AccessibleEventId::BOUNDRECT_CHANGED:
  65         HandleBoundrectChangedEvent();
  66         break;
  67     default:
  68         AccEventListener::notifyEvent(aEvent);
  69         break;
  70     }
  71 }
  72
  73 /**
  74  *  handle the CHILD event
  75  *  @param  oldValue    the child to be deleted
  76  *  @param  newValue    the child to be added
  77  */
  78 void AccFrameEventListener::HandleChildChangedEvent(Any oldValue, Any newValue)
  79 {
  80     Reference< XAccessible > xChild;
  81     if( newValue >>= xChild)
  82     {
  83         //create a new child
  84         if(xChild.is())
  85         {
  86             XAccessible* pAcc = xChild.get();
  87
  88             VCLXWindow* pvclwindow = dynamic_cast<VCLXWindow*>(m_xAccessible.get());
  89             assert(pvclwindow);
  90             const SystemEnvData* systemdata
  91                 = pvclwindow->GetWindow()->GetSystemData();
  92
  93             //add this child
  94             pAgent->InsertAccObj(pAcc, m_xAccessible.get(), systemdata->hWnd);
  95             //add all oldValue's existing children
  96             pAgent->InsertChildrenAccObj(pAcc);
  97             pAgent->NotifyAccEvent(UnoMSAAEvent::CHILD_ADDED, pAcc);
  98         }
  99     }
 100     else if (oldValue >>= xChild)
 101     {
 102         //delete an existing child
 103         if(xChild.is())
 104         {
 105             XAccessible* pAcc = xChild.get();
 106             pAgent->NotifyAccEvent(UnoMSAAEvent::CHILD_REMOVED, pAcc);
 107             //delete all oldValue's existing children
 108             pAgent->DeleteChildrenAccObj( pAcc );
 109             //delete this child
 110             pAgent->DeleteAccObj( pAcc );
 111         }
 112     }
 113
 114 }
 115
 116 /**
 117  *  set the new state and fire the MSAA event
 118  *  @param state    new state id
 119  *  @param enable   true if state is set, false if state is unset
 120  */
 121 void AccFrameEventListener::SetComponentState(sal_Int64 state, bool enable )
 122 {
 123     // only the following state can be fired state event.
 124     switch (state)
 125     {
 126     case AccessibleStateType::ICONIFIED:
 127         // no msaa state
 128         break;
 129     case AccessibleStateType::VISIBLE:
 130         // UNO !VISIBLE == MSAA INVISIBLE
 131         if( enable )
 132             pAgent->IncreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 133         else
 134             pAgent->DecreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 135         break;
 136     case AccessibleStateType::ACTIVE:
 137         // Only frames should be active
 138         // no msaa state mapping
 139         break;
 140     default:
 141         break;
 142     }
 143 }
 144
 145 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */