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*
* 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
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* KIND, either express or implied. See the License for the
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*************************************************************/
package ov;
import com.sun.star.accessibility.AccessibleEventObject;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.accessibility.XAccessibleEventBroadcaster;
import com.sun.star.accessibility.XAccessibleEventListener;
import com.sun.star.lang.EventObject;
import com.sun.star.uno.UnoRuntime;
/** Base class for object views that regsiters as accessibility event
listener.
*/
abstract class ListeningObjectView
extends ObjectView
implements XAccessibleEventListener
{
public ListeningObjectView (ObjectViewContainer aContainer)
{
super (aContainer);
}
/** Add this object as event listener at the broadcasting
accessible object.
*/
public void SetObject (XAccessibleContext xContext)
{
super.SetObject (xContext);
XAccessibleEventBroadcaster xBroadcaster =
(XAccessibleEventBroadcaster)UnoRuntime.queryInterface(
XAccessibleEventBroadcaster.class, xContext);
if (xBroadcaster != null)
xBroadcaster.addEventListener (this);
}
/** Remove this object as event listener from the broadcasting
accessible object.
*/
public void Destroy ()
{
super.Destroy ();
XAccessibleEventBroadcaster xBroadcaster =
(XAccessibleEventBroadcaster)UnoRuntime.queryInterface(
XAccessibleEventBroadcaster.class, mxContext);
if (xBroadcaster != null)
xBroadcaster.removeEventListener (this);
}
/** Derived classes have to implement this method to handle incoming
events.
*/
abstract public void notifyEvent (AccessibleEventObject aEvent);
/** The disposing event is ignored per default. If a derived class is
interested it can overwrite this method.
*/
public void disposing (EventObject aEvent)
{
}
}