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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
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 registers 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.
*/
@Override
public void SetObject (XAccessibleContext xContext)
{
super.SetObject (xContext);
XAccessibleEventBroadcaster xBroadcaster =
UnoRuntime.queryInterface(
XAccessibleEventBroadcaster.class, xContext);
if (xBroadcaster != null)
xBroadcaster.addAccessibleEventListener (this);
}
/** Remove this object as event listener from the broadcasting
accessible object.
*/
@Override
public void Destroy ()
{
super.Destroy ();
XAccessibleEventBroadcaster xBroadcaster =
UnoRuntime.queryInterface(
XAccessibleEventBroadcaster.class, mxContext);
if (xBroadcaster != null)
xBroadcaster.removeAccessibleEventListener (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)
{
}
}
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