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21 
22 #ifndef __ACCTREEEVENTLISTENER_HXX
23 #define __ACCTREEEVENTLISTENER_HXX
24 
25 #include <stdio.h>
26 #include "AccDescendantManagerEventListener.hxx"
27 #include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
28 #include <com/sun/star/accessibility/XAccessible.hpp>
29 
30 using namespace ::com::sun::star::uno;
31 
32 /**
33  * AccTreeEventListener is inherited from AccDescendantManagerEventListener. It handles
34  * the evnets generated by tree controls. The accessible role is: TREE.
35  * It defines the procedure of specific event handling related with tree components
36  * and provides the detailed support for some related methods.
37  */
38 class AccTreeEventListener: public AccDescendantManagerEventListener
39 {
40 public:
41     AccTreeEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent);
42     virtual ~AccTreeEventListener();
43 
44     //AccessibleEventListener
45     virtual void SAL_CALL notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);
46     //for active descendant changed event
47     virtual void SAL_CALL handleActiveDescendantChangedEvent(Any oldValue, Any newValue);
48 };
49 
50 #endif
51