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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
import java.awt.Color;
import java.awt.Component;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreePath;
public class AccessibleTreeCellRenderer
extends DefaultTreeCellRenderer
{
public Color
maDefaultColor,
maChangedColor;
protected ArrayList<Boolean>
maChangedLines;
public AccessibleTreeCellRenderer ()
{
maDefaultColor = Color.black;
maChangedColor = Color.red;
maChangedLines = new ArrayList<Boolean> ();
}
@Override
public Component getTreeCellRendererComponent (
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
{
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
if (maChangedLines.size()<=row || maChangedLines.get (row) == null)
setTextNonSelectionColor (maDefaultColor);
else
setTextNonSelectionColor (maChangedColor);
return this;
}
/** Tell the cell renderer that no changes shall be displayed anymore.
*/
public void clearAllChanges ()
{
maChangedLines.clear();
}
/** Inform the cell renderer of a new changed line which to paint
highlighted when asked to paint it the next time.
*/
public void addChangedLine (int nRow)
{
while (maChangedLines.size() <= nRow)
maChangedLines.add(null);
nRow -= 1; // row index is one to large for some reason.
maChangedLines.set (nRow, true);
}
/** Inform the cell renderer of a set of changed line which to paint
highlighted when asked to paint them the next time.
@param aChangedNodes
The set of changed nodes. Each entry is a TreePath.
@param aTree
The JTree that is used to transform the given TreePath objects
into rows.
*/
public void addChangedNodes (List<TreePath> aChangedNodes, JTree aTree)
{
for (int i=0; i<aChangedNodes.size(); i++)
{
TreePath aPath = aChangedNodes.get (i);
int nRow = aTree.getRowForPath (aPath);
addChangedLine (nRow);
}
}
}
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