toolkit/test/accessibility/AccessibilityTreeModelBase.java

   1 import javax.swing.tree.TreeModel;
   2 import javax.swing.event.TreeModelListener;
   3 import javax.swing.tree.TreePath;
   4 import javax.swing.event.TreeModelEvent;
   5 import java.util.Vector;
   6
   7 public class AccessibilityTreeModelBase
   8     implements TreeModel
   9 {
  10     public AccessibilityTreeModelBase ()
  11     {
  12         setRoot (null);
  13         maTMListeners = new Vector();
  14     }
  15
  16     public synchronized void addTreeModelListener(TreeModelListener l)
  17     {
  18         maTMListeners.add(l);
  19     }
  20
  21     public synchronized void removeTreeModelListener(TreeModelListener l)
  22     {
  23         maTMListeners.remove(l);
  24     }
  25
  26     public synchronized int getChildCount(Object aParent)
  27     {
  28         return (aParent instanceof AccessibleTreeNode) ?
  29             ((AccessibleTreeNode)aParent).getChildCount() : 0;
  30     }
  31
  32     public synchronized Object getChild (Object aParent, int nIndex)
  33     {
  34         Object aChild = null;
  35         try
  36         {
  37             if (aParent != null && aParent instanceof AccessibleTreeNode)
  38                 aChild = ((AccessibleTreeNode)aParent).getChild(nIndex);
  39             else
  40                 System.out.println ("getChild called for unknown parent node");
  41         }
  42         catch (com.sun.star.lang.IndexOutOfBoundsException e)
  43         {
  44             aChild = ("no child " + nIndex + " from " + aParent + ": " + e);
  45         }
  46         return aChild;
  47     }
  48
  49     public synchronized Object getChildNoCreate (Object aParent, int nIndex)
  50     {
  51         Object aChild = null;
  52         try
  53         {
  54             if (aParent != null && aParent instanceof AccessibleTreeNode)
  55                 aChild = ((AccessibleTreeNode)aParent).getChildNoCreate(nIndex);
  56             else
  57                 System.out.println ("getChild called for unknown parent node");
  58         }
  59         catch (com.sun.star.lang.IndexOutOfBoundsException e)
  60         { }
  61         return aChild;
  62     }
  63
  64     /** iterate over all children and look for child */
  65     public synchronized int getIndexOfChild (Object aParent, Object aChild)
  66     {
  67         int nIndex = -1;
  68         try
  69         {
  70             if ((aParent instanceof AccessibleTreeNode) && (aChild instanceof AccessibleTreeNode))
  71             {
  72                 AccessibleTreeNode aParentNode = (AccessibleTreeNode) aParent;
  73                 AccessibleTreeNode aChildNode = (AccessibleTreeNode) aChild;
  74
  75                 int nChildCount = aParentNode.getChildCount();
  76                 for( int i = 0; i < nChildCount; i++ )
  77                 {
  78                     if (aChildNode.equals (aParentNode.getChild (i)))
  79                     {
  80                         nIndex = i;
  81                         break;
  82                     }
  83                 }
  84             }
  85         }
  86         catch (com.sun.star.lang.IndexOutOfBoundsException e)
  87         {
  88             // Return -1 by falling through.
  89         }
  90
  91         // not found?
  92         return nIndex;
  93     }
  94
  95     public boolean isLeaf (Object aNode)
  96     {
  97         return (aNode instanceof AccessibleTreeNode) ?
  98             ((AccessibleTreeNode)aNode).isLeaf() : true;
  99     }
 100
 101
 102
 103     public synchronized Object getRoot()
 104     {
 105         return maRoot;
 106     }
 107
 108     public void valueForPathChanged(TreePath path, Object newValue)
 109     { }
 110
 111     protected synchronized void setRoot (AccessibleTreeNode aRoot)
 112     {
 113         maRoot = aRoot;
 114     }
 115
 116
 117     // The list of TreeModelListener objects.
 118     protected Vector maTMListeners;
 119
 120     // The root node of the tree.  Use setRoot to change it.
 121     private AccessibleTreeNode maRoot = null;
 122 }