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     public void PrintOldAndNew (PrintStream out)
  32     {
  33         out.println ("   children not relevant");
  34     }
  35
  36     public void Process ()
  37     {
  38         AccTreeNode aNode = maTreeModel.updateNode (mxEventSource,
  39             AccessibleComponentHandler.class,
  40             AccessibleExtendedComponentHandler.class);
  41
  42         // Update the graphical representation of aNode in the Canvas.
  43         Canvas aCanvas = maTreeModel.getCanvas();
  44         if (aCanvas != null)
  45         {
  46             // Iterate over all nodes in the sub-tree rooted in aNode.
  47             LinkedList<Object> aShapeQueue = new LinkedList<Object>();
  48             aShapeQueue.addLast (aNode);
  49             while (aShapeQueue.size() > 0)
  50             {
  51                 // Remove the first node from the queue and update its
  52                 // graphical representation.
  53                 AccTreeNode aShapeNode = (AccTreeNode) aShapeQueue.getFirst();
  54                 aShapeQueue.removeFirst();
  55                 aCanvas.updateNodeGeometry (aShapeNode);
  56
  57                 // Add the node's children to the queue.
  58                 int nChildCount = maTreeModel.getChildCount (aShapeNode);
  59                 for (int i=0; i<nChildCount; i++)
  60                 {
  61                     Object aTreeNode = maTreeModel.getChildNoCreate (aShapeNode, i);
  62                     if (aTreeNode instanceof AccTreeNode)
  63                         aShapeQueue.addLast (aTreeNode);
  64                 }
  65             }
  66             aCanvas.repaint ();
  67         }
  68     }
  69 }