toolkit/test/accessibility/TopWindowListener.java

   1 /*
   2  * This file is part of the LibreOffice project.
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7  *
   8  * This file incorporates work covered by the following license notice:
   9  *
  10  *   Licensed to the Apache Software Foundation (ASF) under one or more
  11  *   contributor license agreements. See the NOTICE file distributed
  12  *   with this work for additional information regarding copyright
  13  *   ownership. The ASF licenses this file to you under the Apache
  14  *   License, Version 2.0 (the "License"); you may not use this file
  15  *   except in compliance with the License. You may obtain a copy of
  16  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  17  */
  18
  19 import com.sun.star.awt.XWindow;
  20 import com.sun.star.awt.XExtendedToolkit;
  21 import com.sun.star.accessibility.XAccessible;
  22 import com.sun.star.accessibility.XAccessibleContext;
  23 import com.sun.star.uno.UnoRuntime;
  24
  25 /** Listen for top window events and create or delete children of the tree
  26     model accordingly.
  27 */
  28 class TopWindowListener
  29 {
  30     TopWindowListener (AccessibilityTreeModel aModel, SimpleOffice aOffice)
  31     {
  32         maModel = aModel;
  33         maOffice = aOffice;
  34     }
  35
  36
  37
  38
  39     /** Use this function to initially fill the accessibility object tree
  40         view with nodes for top level windows.
  41     */
  42     public void Initialize ()
  43     {
  44         XExtendedToolkit xToolkit = maOffice.getExtendedToolkit();
  45         if (xToolkit != null)
  46         {
  47             maModel.lock ();
  48             int nTopWindowCount = xToolkit.getTopWindowCount();
  49             MessageArea.println ("There are " + nTopWindowCount + " top windows.");
  50             for (int i=0; i<nTopWindowCount; i++)
  51             {
  52                 try
  53                 {
  54                     XAccessible xAccessible = maOffice.getAccessibleObject(
  55                         xToolkit.getTopWindow (i));
  56                     // Uncomment the following line to get the real root of
  57                     //   the accessible tree that xAccessible belongs to.
  58                     // xAccessible = maOffice.getAccessibleRoot(xAccessible);
  59                     AddTopLevelNode (xAccessible);
  60                 }
  61                 catch (Exception e)
  62                 {
  63                     System.out.println ("caught exception: " + e);
  64                     e.printStackTrace();
  65                 }
  66             }
  67             maModel.unlock ((AccessibleTreeNode)maModel.getRoot());
  68         }
  69     }
  70
  71
  72
  73     /** Add a new top level node which, to be exact, will be placed on the
  74         second layer of the tree.
  75         @param xNewTopLevelObject
  76             The accessible object of the new top level window.
  77     */
  78     private void AddTopLevelNode (XAccessible xNewTopLevelObject)
  79     {
  80         System.out.println ("adding top level window");
  81         if (xNewTopLevelObject != null)
  82         {
  83             XAccessibleContext xContext = xNewTopLevelObject.getAccessibleContext();
  84             if (xContext == null)
  85                 System.out.println ("top level window not accessible");
  86             else
  87             {
  88                 Object aRootObject = maModel.getRoot();
  89                 if (aRootObject instanceof VectorNode)
  90                 {
  91                     VectorNode aRoot = (VectorNode) aRootObject;
  92                     AccessibleTreeNode aNode =
  93                         NodeFactory.Instance().createDefaultNode (xNewTopLevelObject, aRoot);
  94                     aRoot.addChild (aNode);
  95                     maModel.fireTreeNodesInserted (maModel.createEvent (aRoot, aNode));
  96                 }
  97             }
  98         }
  99     }
 100
 101     /** Remove an existing top level node from the tree.
 102         @param xNewTopLevelObject
 103             The accessible object to remove.
 104     */
 105     private void RemoveTopLevelNode (XAccessible xTopLevelObject)
 106     {
 107         Object aObject = maModel.getRoot();
 108         if (aObject instanceof VectorNode && xTopLevelObject != null)
 109         {
 110             System.out.println ("removing node " + xTopLevelObject);
 111             maModel.removeNode (xTopLevelObject.getAccessibleContext());
 112         }
 113     }
 114
 115
 116
 117
 118
 119     // XTopWindowListener
 120     public void windowOpened (final com.sun.star.lang.EventObject aEvent)
 121         throws RuntimeException
 122     {
 123         if (maModel != null)
 124         {
 125             XWindow xWindow = UnoRuntime.queryInterface(
 126                 XWindow.class, aEvent.Source);
 127             if (xWindow == null)
 128                 System.out.println ("event source is no XWindow");
 129             else
 130             {
 131                 XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
 132                 if (xAccessible == null)
 133                     System.out.println ("event source is no XAccessible");
 134                 else
 135                     AddTopLevelNode (xAccessible);
 136             }
 137         }
 138     }
 139
 140
 141
 142
 143     public void windowClosed (final com.sun.star.lang.EventObject aEvent)
 144         throws RuntimeException
 145     {
 146         if (maModel != null)
 147         {
 148             XWindow xWindow = UnoRuntime.queryInterface(
 149                 XWindow.class, aEvent.Source);
 150             if (xWindow == null)
 151                 System.out.println ("event source is no XWindow");
 152             else
 153             {
 154                 XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
 155                 if (xAccessible == null)
 156                     System.out.println ("event source is no XAccessible");
 157                 else
 158                     RemoveTopLevelNode (xAccessible);
 159             }
 160         }
 161     }
 162
 163     public void disposing (final com.sun.star.lang.EventObject aEvent)
 164     {
 165         System.out.println ("Top window disposed: " + aEvent);
 166     }
 167
 168
 169
 170
 171     private final AccessibilityTreeModel
 172         maModel;
 173     private final SimpleOffice
 174         maOffice;
 175 }