AOO410/main/toolkit/test/accessibility/EventListener.java

/**************************************************************
 * 
 * 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.
 * 
 *************************************************************/


import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeModelEvent;

import java.util.Vector;
import java.util.HashMap;
import java.util.Enumeration;

import com.sun.star.accessibility.*;
import com.sun.star.uno.*;

import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.XInterface;
import com.sun.star.uno.Any;
import com.sun.star.lang.EventObject;
import com.sun.star.lang.XServiceInfo;
import com.sun.star.lang.XServiceName;

/** Objects of this class (usually one, singleton?) listen to accessible
    events of all objects in all trees.
*/
public class EventListener
{
    public boolean mbVerbose = false;

    public EventListener (AccessibilityTreeModel aTreeModel)
    {
        maTreeModel = aTreeModel;
    }


    private static String objectToString(Object aObject)
    {
        if (aObject == null)
            return null;
        else
            return aObject.toString();
    }



    /** This method handles accessibility objects that are being disposed.
     */
    public void disposing (XAccessibleContext xContext)
    {
        if (mbVerbose)
            System.out.println("disposing " + xContext);
        maTreeModel.removeNode (xContext);
    }

    /** This method is called from accessible objects that broadcast
        modifications of themselves or from their children.  The event is
        processed only, except printing some messages, if the tree is not
        locked.  It should be locked during changes to its internal
        structure like expanding nodes.
    */
    public void notifyEvent (AccessibleEventObject aEvent)
    {
        EventHandler aHandler;

        switch (aEvent.EventId)
        {
            case AccessibleEventId.CHILD:
                aHandler = new ChildEventHandler (aEvent, maTreeModel);
                break;

            case AccessibleEventId.BOUNDRECT_CHANGED:
            case AccessibleEventId.VISIBLE_DATA_CHANGED:
                aHandler = new GeometryEventHandler (aEvent, maTreeModel);
                break;


            case AccessibleEventId.NAME_CHANGED:
            case AccessibleEventId.DESCRIPTION_CHANGED:
            case AccessibleEventId.STATE_CHANGED:
            case AccessibleEventId.SELECTION_CHANGED:
                aHandler = new ContextEventHandler (aEvent, maTreeModel);
                break;

            case AccessibleEventId.TABLE_MODEL_CHANGED:
            case AccessibleEventId.TABLE_CAPTION_CHANGED:
            case AccessibleEventId.TABLE_COLUMN_DESCRIPTION_CHANGED:
            case AccessibleEventId.TABLE_COLUMN_HEADER_CHANGED:
            case AccessibleEventId.TABLE_ROW_DESCRIPTION_CHANGED:
            case AccessibleEventId.TABLE_ROW_HEADER_CHANGED:
            case AccessibleEventId.TABLE_SUMMARY_CHANGED:
                aHandler = new TableEventHandler (aEvent, maTreeModel);
                break;

            case AccessibleEventId.ACTION_CHANGED:
                aHandler = new EventHandler (aEvent, maTreeModel);
                break;

            case AccessibleEventId.HYPERTEXT_CHANGED:
                aHandler = new EventHandler (aEvent, maTreeModel);
                break;

            case AccessibleEventId.ACTIVE_DESCENDANT_CHANGED:
            case AccessibleEventId.CARET_CHANGED:
            case AccessibleEventId.TEXT_CHANGED:
            case AccessibleEventId.VALUE_CHANGED:
                aHandler = new EventHandler (aEvent, maTreeModel);
                break;

            default:
                aHandler = null;
                break;
        }

        if (aHandler == null)
            System.out.println ("    unhandled event");
        else
        {
            if (mbVerbose)
                aHandler.Print (System.out);
            aHandler.Process ();
        }
    }


    private AccessibilityTreeModel maTreeModel;
}