/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
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 *************************************************************/

#ifndef __ACCTREEEVENTLISTENER_HXX
#define __ACCTREEEVENTLISTENER_HXX

#include <stdio.h>
#include "AccDescendantManagerEventListener.hxx"
#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
#include <com/sun/star/accessibility/XAccessible.hpp>

using namespace ::com::sun::star::uno;

/**
 * AccTreeEventListener is inherited from AccDescendantManagerEventListener. It handles 
 * the evnets generated by tree controls. The accessible role is: TREE.
 * It defines the procedure of specific event handling related with tree components 
 * and provides the detailed support for some related methods. 
 */
class AccTreeEventListener: public AccDescendantManagerEventListener
{
public:
    AccTreeEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent);
    virtual ~AccTreeEventListener();

    //AccessibleEventListener
    virtual void SAL_CALL notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);
    //for active descendant changed event
    virtual void SAL_CALL handleActiveDescendantChangedEvent(Any oldValue, Any newValue);
};

#endif