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(com::sun::star::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 ::com::sun::star::accessibility::AccessibleEventObject& aEvent )
  53 throw (::com::sun::star::uno::RuntimeException)
  54 {
  55     SolarMutexGuard g;
  56
  57     switch (aEvent.EventId)
  58     {
  59     case AccessibleEventId::CHILD:
  60         HandleChildChangedEvent(aEvent.OldValue, aEvent.NewValue);
  61         break;
  62     case AccessibleEventId::VISIBLE_DATA_CHANGED:
  63         HandleVisibleDataChangedEvent();
  64         break;
  65     case AccessibleEventId::BOUNDRECT_CHANGED:
  66         HandleBoundrectChangedEvent();
  67         break;
  68     default:
  69         AccEventListener::notifyEvent(aEvent);
  70         break;
  71     }
  72 }
  73
  74 /**
  75  *  handle the CHILD event
  76  *  @param  oldValue    the child to be deleted
  77  *  @param  newValue    the child to be added
  78  */
  79 void AccFrameEventListener::HandleChildChangedEvent(Any oldValue, Any newValue)
  80 {
  81     Reference< XAccessible > xChild;
  82     if( newValue >>= xChild)
  83     {
  84         //create a new child
  85         if(xChild.is())
  86         {
  87             XAccessible* pAcc = xChild.get();
  88
  89             VCLXWindow* pvclwindow =
  90                 dynamic_cast<VCLXWindow*>(m_xAccessible.get());
  91             vcl::Window* window = pvclwindow->GetWindow();
  92             const SystemEnvData* systemdata=window->GetSystemData();
  93
  94             //add this child
  95             pAgent->InsertAccObj(pAcc, m_xAccessible.get(),
  96                     reinterpret_cast<sal_Int64>(systemdata->hWnd));
  97             //add all oldValue's existing children
  98             pAgent->InsertChildrenAccObj(pAcc);
  99             pAgent->NotifyAccEvent(UM_EVENT_CHILD_ADDED, pAcc);
 100         }
 101         else
 102         {}
 103     }
 104     else if (oldValue >>= xChild)
 105     {
 106         //delete a existing child
 107         if(xChild.is())
 108         {
 109             XAccessible* pAcc = xChild.get();
 110             pAgent->NotifyAccEvent(UM_EVENT_CHILD_REMOVED, pAcc);
 111             //delete all oldValue's existing children
 112             pAgent->DeleteChildrenAccObj( pAcc );
 113             //delete this child
 114             pAgent->DeleteAccObj( pAcc );
 115         }
 116         else
 117         {}
 118     }
 119
 120 }
 121
 122 /**
 123  *  set the new state and fire the MSAA event
 124  *  @param state    new state id
 125  *  @param enable   true if state is set, false if state is unset
 126  */
 127 void AccFrameEventListener::SetComponentState(short state, bool enable )
 128 {
 129     // only the following state can be fired state event.
 130     switch (state)
 131     {
 132     case AccessibleStateType::ICONIFIED:
 133         // no msaa state
 134         break;
 135     case AccessibleStateType::VISIBLE:
 136         // UNO !VISIBLE == MSAA INVISIBLE
 137         if( enable )
 138             pAgent->IncreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 139         else
 140             pAgent->DecreaseState(m_xAccessible.get(), AccessibleStateType::VISIBLE);
 141         break;
 142     case AccessibleStateType::ACTIVE:
 143         // Only frames should be active
 144         // no msaa state mapping
 145         break;
 146     default:
 147         break;
 148     }
 149 }
 150
 151 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */