AccListEventListener.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <com/sun/star/accessibility/XAccessible.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
 
#include <vcl/svapp.hxx>
 
#include <AccListEventListener.hxx>
#include <AccObjectManagerAgent.hxx>
#include <unomsaaevent.hxx>
 
using namespace com::sun::star::uno;
using namespace com::sun::star::accessibility;
 
AccListEventListener::AccListEventListener(css::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
        :AccDescendantManagerEventListener(pAcc, Agent)
{
}
 
AccListEventListener::~AccListEventListener()
{
}
 
void  AccListEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent )
{
    SolarMutexGuard g;
 
    switch (aEvent.EventId)
    {
    case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
        HandleActiveDescendantChangedEvent(aEvent.OldValue, aEvent.NewValue);
        break;
    case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
        // Since List items a transient a child events are mostly used
        // to attach/detach listeners, it is safe to ignore it here
        //TODO: investigate again
        break;
    case AccessibleEventId::VALUE_CHANGED:
        HandleValueChangedEvent(aEvent.OldValue, aEvent.NewValue);
        break;
    default:
        AccDescendantManagerEventListener::notifyEvent(aEvent);
        break;
    }
}
 
void AccListEventListener::HandleActiveDescendantChangedEvent(Any oldValue, Any newValue)
{
    Reference< XAccessible > xChild;
 
    if(newValue >>= xChild )
    {
        if(xChild.is())
        {
            XAccessible* pAcc = xChild.get();
 
            // Valueset has cache the child item xacc,Update state if no insert obj
            bool bHasCache = pAgent->InsertAccObj(pAcc, m_xAccessible.get());
            if (!bHasCache)
            {
                pAgent->UpdateState(pAcc);
            }
 
            pAgent->IncreaseState( pAcc, AccessibleStateType::FOCUSED);
 
            pAgent->NotifyAccEvent(UnoMSAAEvent::ACTIVE_DESCENDANT_CHANGED, pAcc);
        }
    }
    if (oldValue >>= xChild)
    {
        if(xChild.is())
        {
            XAccessible* pAcc = xChild.get();
            pAgent->DeleteAccObj( pAcc );
        }
    }
}
 
void AccListEventListener::HandleValueChangedEvent(Any, Any)
{
    //to enable value changed event
    if (GetParentRole() == AccessibleRole::COMBO_BOX)
    {
        XAccessible* pParentAcc =
            pAgent->GetParentXAccessible(m_xAccessible.get());
        pAgent->UpdateValue(pParentAcc);
        pAgent->NotifyAccEvent(UnoMSAAEvent::OBJECT_VALUECHANGE, pParentAcc);
    }
}
 
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