toolkit/test/accessibility/AccessibleTreeCellRenderer.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 java.awt.Color;
  20 import java.awt.Component;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23
  24 import javax.swing.JTree;
  25 import javax.swing.tree.DefaultTreeCellRenderer;
  26 import javax.swing.tree.TreePath;
  27
  28
  29 public class AccessibleTreeCellRenderer
  30     extends DefaultTreeCellRenderer
  31 {
  32     public Color
  33         maDefaultColor,
  34         maChangedColor;
  35     protected ArrayList<Boolean>
  36         maChangedLines;
  37
  38
  39
  40     public AccessibleTreeCellRenderer ()
  41     {
  42         maDefaultColor = Color.black;
  43         maChangedColor = Color.red;
  44         maChangedLines = new ArrayList<Boolean> ();
  45     }
  46
  47     public Component getTreeCellRendererComponent (
  48         JTree tree,
  49         Object value,
  50         boolean sel,
  51         boolean expanded,
  52         boolean leaf,
  53         int row,
  54         boolean hasFocus)
  55     {
  56         super.getTreeCellRendererComponent(
  57             tree, value, sel,
  58             expanded, leaf, row,
  59             hasFocus);
  60
  61         if (maChangedLines.size()<=row || maChangedLines.get (row) == null)
  62             setTextNonSelectionColor (maDefaultColor);
  63         else
  64             setTextNonSelectionColor (maChangedColor);
  65
  66         return this;
  67     }
  68
  69     /** Tell the cell renderer that no changes shall be displayed anymore.
  70     */
  71     public void clearAllChanges ()
  72     {
  73         maChangedLines.clear();
  74     }
  75
  76     /** Inform the cell renderer of a new changed line which to paint
  77         highlighted when asked to paint it the next time.
  78     */
  79     public void addChangedLine (int nRow)
  80     {
  81         while (maChangedLines.size() <= nRow)
  82             maChangedLines.add(null);
  83         nRow -= 1; // row index is one to large for some reason.
  84         maChangedLines.set (nRow, true);
  85     }
  86
  87     /** Inform the cell renderer of a set of changed line which to paint
  88         highlighted when asked to paint them the next time.
  89         @param aChangedNodes
  90             The set of changed nodes.  Each entry is a TreePath.
  91         @param aTree
  92             The JTree that is used to transform the given TreePath objects
  93             into rows.
  94     */
  95     public void addChangedNodes (List<TreePath> aChangedNodes, JTree aTree)
  96     {
  97         for (int i=0; i<aChangedNodes.size(); i++)
  98         {
  99             TreePath aPath = aChangedNodes.get (i);
 100             int nRow = aTree.getRowForPath (aPath);
 101             addChangedLine (nRow);
 102         }
 103     }
 104
 105 }
 106