1 files changed, 87 insertions, 0 deletions
diff --git a/winaccessibility/source/service/AccTreeEventListener.cxx b/winaccessibility/source/service/AccTreeEventListener.cxx
new file mode 100644
index 000000000000..6cde4e5979e0
--- /dev/null
+++ b/winaccessibility/source/service/AccTreeEventListener.cxx
@@ -0,0 +1,87 @@
+/**************************************************************
+ *
+ * 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
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ *************************************************************/
+
+#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 "AccTreeEventListener.hxx"
+#include "AccObjectManagerAgent.hxx"
+#include "unomsaaevent.hxx"
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::accessibility;
+
+AccTreeEventListener::AccTreeEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
+        :AccDescendantManagerEventListener(pAcc, Agent)
+{}
+AccTreeEventListener::~AccTreeEventListener()
+{
+}
+
+/**
+ *  Uno's event notifier when event is captured
+ *  @param AccessibleEventObject    the event object which contains information about event
+ */
+void  AccTreeEventListener::notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException)
+{
+    switch (aEvent.EventId)
+    {
+    case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
+        handleActiveDescendantChangedEvent(aEvent.OldValue, aEvent.NewValue);
+        break;
+    default:
+        AccDescendantManagerEventListener::notifyEvent(aEvent);
+        break;
+    }
+}
+
+/**
+ *  handle the ACTIVE_DESCENDANT_CHANGED event
+ *  @param  oldValue    the child to lose active
+ *  @param  newValue    the child to get active
+ */
+void AccTreeEventListener::handleActiveDescendantChangedEvent(Any oldValue, Any newValue)
+{
+    Reference< XAccessible > xChild;
+    if(newValue >>= xChild )
+    {
+        if(xChild.is())
+        {
+            XAccessible* pAcc = xChild.get();
+            pAgent->InsertAccObj(pAcc,pAccessible);
+            pAgent->NotifyAccEvent(UM_EVENT_ACTIVE_DESCENDANT_CHANGED, pAcc);
+            pActiveDescendant = pAcc;
+        }
+    }
+    if (oldValue >>= xChild)
+    {
+        //delete an existing child
+        if(xChild.is())
+        {
+            XAccessible* pAcc = xChild.get();
+            pAgent->DeleteAccObj( pAcc );
+        }
+    }
+
+}