1 
2 import javax.swing.tree.TreeModel;
3 import javax.swing.tree.TreePath;
4 import javax.swing.event.TreeModelListener;
5 import javax.swing.event.TreeModelEvent;
6 
7 import java.util.Vector;
8 import java.util.HashMap;
9 import java.util.Enumeration;
10 
11 import com.sun.star.accessibility.*;
12 import com.sun.star.uno.*;
13 
14 import com.sun.star.uno.UnoRuntime;
15 import com.sun.star.uno.XInterface;
16 import com.sun.star.uno.Any;
17 import com.sun.star.lang.EventObject;
18 import com.sun.star.lang.XServiceInfo;
19 import com.sun.star.lang.XServiceName;
20 
21 /** Objects of this class (usually one, singleton?) listen to accessible
22     events of all objects in all trees.
23 */
24 public class EventListener
25 {
26     public boolean mbVerbose = false;
27 
28     public EventListener (AccessibilityTreeModel aTreeModel)
29     {
30         maTreeModel = aTreeModel;
31     }
32 
33 
34     private static String objectToString(Object aObject)
35     {
36         if (aObject == null)
37             return null;
38         else
39             return aObject.toString();
40     }
41 
42 
43 
44     /** This method handles accessibility objects that are being disposed.
45      */
46     public void disposing (XAccessibleContext xContext)
47     {
48         if (mbVerbose)
49             System.out.println("disposing " + xContext);
50         maTreeModel.removeNode (xContext);
51     }
52 
53     /** This method is called from accessible objects that broadcast
54         modifications of themselves or from their children.  The event is
55         processed only, except printing some messages, if the tree is not
56         locked.  It should be locked during changes to its internal
57         structure like expanding nodes.
58     */
59     public void notifyEvent (AccessibleEventObject aEvent)
60     {
61         EventHandler aHandler;
62 
63         switch (aEvent.EventId)
64         {
65             case AccessibleEventId.CHILD:
66                 aHandler = new ChildEventHandler (aEvent, maTreeModel);
67                 break;
68 
69             case AccessibleEventId.BOUNDRECT_CHANGED:
70             case AccessibleEventId.VISIBLE_DATA_CHANGED:
71                 aHandler = new GeometryEventHandler (aEvent, maTreeModel);
72                 break;
73 
74 
75             case AccessibleEventId.NAME_CHANGED:
76             case AccessibleEventId.DESCRIPTION_CHANGED:
77             case AccessibleEventId.STATE_CHANGED:
78             case AccessibleEventId.SELECTION_CHANGED:
79                 aHandler = new ContextEventHandler (aEvent, maTreeModel);
80                 break;
81 
82             case AccessibleEventId.TABLE_MODEL_CHANGED:
83             case AccessibleEventId.TABLE_CAPTION_CHANGED:
84             case AccessibleEventId.TABLE_COLUMN_DESCRIPTION_CHANGED:
85             case AccessibleEventId.TABLE_COLUMN_HEADER_CHANGED:
86             case AccessibleEventId.TABLE_ROW_DESCRIPTION_CHANGED:
87             case AccessibleEventId.TABLE_ROW_HEADER_CHANGED:
88             case AccessibleEventId.TABLE_SUMMARY_CHANGED:
89                 aHandler = new TableEventHandler (aEvent, maTreeModel);
90                 break;
91 
92             case AccessibleEventId.ACTION_CHANGED:
93                 aHandler = new EventHandler (aEvent, maTreeModel);
94                 break;
95 
96             case AccessibleEventId.HYPERTEXT_CHANGED:
97                 aHandler = new EventHandler (aEvent, maTreeModel);
98                 break;
99 
100             case AccessibleEventId.ACTIVE_DESCENDANT_CHANGED:
101             case AccessibleEventId.CARET_CHANGED:
102             case AccessibleEventId.TEXT_CHANGED:
103             case AccessibleEventId.VALUE_CHANGED:
104                 aHandler = new EventHandler (aEvent, maTreeModel);
105                 break;
106 
107             default:
108                 aHandler = null;
109                 break;
110         }
111 
112         if (aHandler == null)
113             System.out.println ("    unhandled event");
114         else
115         {
116             if (mbVerbose)
117                 aHandler.Print (System.out);
118             aHandler.Process ();
119         }
120     }
121 
122 
123     private AccessibilityTreeModel maTreeModel;
124 }
125