toolkit/test/accessibility/GeometryEventHandler.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.accessibility.AccessibleEventObject;
  20 import java.io.PrintStream;
  21 import java.util.LinkedList;
  22
  23 class GeometryEventHandler
  24     extends EventHandler
  25 {
  26     public GeometryEventHandler (AccessibleEventObject aEvent, AccessibilityTreeModel aTreeModel)
  27     {
  28         super (aEvent, aTreeModel);
  29     }
  30
  31     @Override
  32     public void PrintOldAndNew (PrintStream out)
  33     {
  34         out.println ("   children not relevant");
  35     }
  36
  37     @Override
  38     public void Process ()
  39     {
  40         AccTreeNode aNode = maTreeModel.updateNode (mxEventSource,
  41             AccessibleComponentHandler.class,
  42             AccessibleExtendedComponentHandler.class);
  43
  44         // Update the graphical representation of aNode in the Canvas.
  45         Canvas aCanvas = maTreeModel.getCanvas();
  46         if (aCanvas != null)
  47         {
  48             // Iterate over all nodes in the sub-tree rooted in aNode.
  49             LinkedList<Object> aShapeQueue = new LinkedList<Object>();
  50             aShapeQueue.addLast (aNode);
  51             while (aShapeQueue.size() > 0)
  52             {
  53                 // Remove the first node from the queue and update its
  54                 // graphical representation.
  55                 AccTreeNode aShapeNode = (AccTreeNode) aShapeQueue.getFirst();
  56                 aShapeQueue.removeFirst();
  57                 aCanvas.updateNodeGeometry (aShapeNode);
  58
  59                 // Add the node's children to the queue.
  60                 int nChildCount = maTreeModel.getChildCount (aShapeNode);
  61                 for (int i=0; i<nChildCount; i++)
  62                 {
  63                     Object aTreeNode = maTreeModel.getChildNoCreate (aShapeNode, i);
  64                     if (aTreeNode instanceof AccTreeNode)
  65                         aShapeQueue.addLast (aTreeNode);
  66                 }
  67             }
  68             aCanvas.repaint ();
  69         }
  70     }
  71 }