toolkit/test/accessibility/TopWindowListener.java

   1 import com.sun.star.awt.XWindow;
   2 import com.sun.star.awt.XExtendedToolkit;
   3 import com.sun.star.accessibility.XAccessible;
   4 import com.sun.star.accessibility.XAccessibleContext;
   5 import com.sun.star.uno.XInterface;
   6 import com.sun.star.uno.UnoRuntime;
   7 import javax.swing.event.TreeModelEvent;
   8
   9 /** Listen for top window events and create or delete children of the tree
  10     model accordingly.
  11 */
  12 class TopWindowListener
  13 {
  14     TopWindowListener (AccessibilityTreeModel aModel, SimpleOffice aOffice)
  15     {
  16         maModel = aModel;
  17         maOffice = aOffice;
  18     }
  19
  20
  21
  22
  23     /** Use this function to initially fill the accessibility object tree
  24         view with nodes for top level windows.
  25     */
  26     public void Initialize ()
  27     {
  28         XExtendedToolkit xToolkit = maOffice.getExtendedToolkit();
  29         if (xToolkit != null)
  30         {
  31             maModel.lock ();
  32             int nTopWindowCount = xToolkit.getTopWindowCount();
  33             MessageArea.println ("There are " + nTopWindowCount + " top windows.");
  34             for (int i=0; i<nTopWindowCount; i++)
  35             {
  36                 try
  37                 {
  38                     XAccessible xAccessible = maOffice.getAccessibleObject(
  39                         xToolkit.getTopWindow (i));
  40                     // Uncomment the following line to get the real root of
  41                     //   the accessible tree that xAccessible belongs to.
  42                     // xAccessible = maOffice.getAccessibleRoot(xAccessible);
  43                     AddTopLevelNode (xAccessible);
  44                 }
  45                 catch (Exception e)
  46                 {
  47                     System.out.println ("caught exception: " + e);
  48                     e.printStackTrace();
  49                 }
  50             }
  51             maModel.unlock ((AccessibleTreeNode)maModel.getRoot());
  52         }
  53     }
  54
  55
  56
  57     /** Add a new top level node which, to be exact, will be placed on the
  58         second layer of the tree.
  59         @param xNewTopLevelObject
  60             The accessible object of the new top level window.
  61     */
  62     private void AddTopLevelNode (XAccessible xNewTopLevelObject)
  63     {
  64         System.out.println ("adding top level window");
  65         if (xNewTopLevelObject != null)
  66         {
  67             XAccessibleContext xContext = xNewTopLevelObject.getAccessibleContext();
  68             if (xContext == null)
  69                 System.out.println ("top level window not accessible");
  70             else
  71             {
  72                 if ( ! FilterTopLevelNode (xContext))
  73                 {
  74                     Object aRootObject = maModel.getRoot();
  75                     if (aRootObject instanceof VectorNode)
  76                     {
  77                         VectorNode aRoot = (VectorNode) aRootObject;
  78                         AccessibleTreeNode aNode =
  79                             NodeFactory.Instance().createDefaultNode (xNewTopLevelObject, aRoot);
  80                         aRoot.addChild (aNode);
  81                         maModel.fireTreeNodesInserted (maModel.createEvent (aRoot, aNode));
  82                     }
  83                 }
  84             }
  85         }
  86     }
  87
  88     /** Ignore windows that have no accessible name, i.e. do not represent
  89         document windows.
  90         @return
  91             Returns <true/> when the given object should not be displayed,
  92             i.e. filtered out.
  93     */
  94     private boolean FilterTopLevelNode (XAccessibleContext xContext)
  95     {
  96         // No filtering at the moment.
  97         return false;
  98         //        return xContext.getAccessibleName().length() == 0;
  99     }
 100
 101
 102
 103
 104     /** Remove an existing top level node from the tree.
 105         @param xNewTopLevelObject
 106             The accessible object to remove.
 107     */
 108     private void RemoveTopLevelNode (XAccessible xTopLevelObject)
 109     {
 110         Object aObject = maModel.getRoot();
 111         if (aObject instanceof VectorNode && xTopLevelObject != null)
 112         {
 113             System.out.println ("removing node " + xTopLevelObject);
 114             VectorNode aRoot = (VectorNode) aObject;
 115             maModel.removeNode (xTopLevelObject.getAccessibleContext());
 116         }
 117     }
 118
 119
 120
 121
 122
 123     /**  This method exists for debugging.  It prints a list of all top
 124          level windows.
 125     */
 126     private void ShowAllTopLevelWindows ()
 127     {
 128         XExtendedToolkit xToolkit = maOffice.getExtendedToolkit();
 129         if (xToolkit != null)
 130         {
 131             int nTopWindowCount = xToolkit.getTopWindowCount();
 132             for (int i=0; i<nTopWindowCount; i++)
 133             {
 134                 try
 135                 {
 136                     System.out.println (i + " : " + xToolkit.getTopWindow (i));
 137                 }
 138                 catch (Exception e)
 139                 {
 140                     System.out.println ("caught exception; " + e);
 141                 }
 142             }
 143         }
 144     }
 145
 146
 147
 148
 149     // XTopWindowListener
 150     public void windowOpened (final com.sun.star.lang.EventObject aEvent)
 151         throws RuntimeException
 152     {
 153         if (maModel != null)
 154         {
 155             XWindow xWindow = (XWindow) UnoRuntime.queryInterface(
 156                 XWindow.class, aEvent.Source);
 157             if (xWindow == null)
 158                 System.out.println ("event source is no XWindow");
 159             else
 160             {
 161                 XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
 162                 if (xAccessible == null)
 163                     System.out.println ("event source is no XAccessible");
 164                 else
 165                     AddTopLevelNode (xAccessible);
 166             }
 167         }
 168     }
 169
 170
 171
 172
 173     public void windowClosed (final com.sun.star.lang.EventObject aEvent)
 174         throws RuntimeException
 175     {
 176         if (maModel != null)
 177         {
 178             XWindow xWindow = (XWindow) UnoRuntime.queryInterface(
 179                 XWindow.class, aEvent.Source);
 180             if (xWindow == null)
 181                 System.out.println ("event source is no XWindow");
 182             else
 183             {
 184                 XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
 185                 if (xAccessible == null)
 186                     System.out.println ("event source is no XAccessible");
 187                 else
 188                     RemoveTopLevelNode (xAccessible);
 189             }
 190         }
 191     }
 192
 193     public void disposing (final com.sun.star.lang.EventObject aEvent)
 194     {
 195         System.out.println ("Top window disposed: " + aEvent);
 196     }
 197
 198
 199
 200
 201     private AccessibilityTreeModel
 202         maModel;
 203     private SimpleOffice
 204         maOffice;
 205 }