001 /*
002 * Copyright (c) 2005 Einar Pehrson, Malin Johansson and Sofia Nilsson
003 *
004 * This file is part of
005 * CleanSheets Extension for Dependency Trees
006 *
007 * CleanSheets Extension for Dependency Trees is free software; you can
008 * redistribute it and/or modify it under the terms of the GNU General Public
009 * License as published by the Free Software Foundation; either version 2 of
010 * the License, or (at your option) any later version.
011 *
012 * CleanSheets Extension for Dependency Trees is distributed in the hope that
013 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
014 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
015 * See the GNU General Public License for more details.
016 *
017 * You should have received a copy of the GNU General Public License
018 * along with CleanSheets Extension for Dependency Trees; if not, write to the
019 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307 USA
021 */
022 package csheets.ext.deptree;
023
024 import java.awt.Component;
025
026 import javax.swing.Icon;
027 import javax.swing.ImageIcon;
028 import javax.swing.JTree;
029 import javax.swing.tree.DefaultTreeCellRenderer;
030
031 import csheets.core.Cell;
032
033 /**
034 * The renderer used for nodes in dependency trees.
035 * @author Malin Johansson
036 * @author Sofia Nilsson
037 * @author Einar Pehrson
038 */
039 @SuppressWarnings("serial")
040 public class DependencyTreeCellRenderer extends DefaultTreeCellRenderer{
041
042 /** An icon representing a node containing a formula */
043 private Icon formulaIcon = new ImageIcon(
044 DependencyTreeExtension.class.getResource("res/img/formula.gif"));
045
046 /** An icon representing a cell containing a constant value */
047 private Icon literalIcon = new ImageIcon(
048 DependencyTreeExtension.class.getResource("res/img/literal.gif"));
049
050 /** An icon representing a cell containing a range */
051 private Icon rangeIcon = new ImageIcon(
052 DependencyTreeExtension.class.getResource("res/img/range.gif"));
053
054 /**
055 * Creates a new dependency tree cell renderer
056 */
057 public DependencyTreeCellRenderer() {}
058
059 public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded,
060 boolean leaf, int row, boolean hasFocus) {
061
062 if (value instanceof CellNode) {
063 // Selects the appropriate icon and tool tip to display
064 Cell cell = ((CellNode)value).getCell();
065 Icon icon;
066 if (cell.getFormula() == null) {
067 icon = literalIcon;
068 setToolTipText(cell.getValue().toString());
069 } else {
070 icon = formulaIcon;
071 setToolTipText(cell.getValue() + " = " + cell.getFormula());
072 }
073
074 // Updates the appropriate icon(s)
075 if (leaf)
076 setLeafIcon(icon);
077 else {
078 setOpenIcon(icon);
079 setClosedIcon(icon);
080 }
081 } else if (value instanceof ReferenceNode) {
082 // Node is a reference to multiple cells, and therefore not a leaf
083 setOpenIcon(rangeIcon);
084 setClosedIcon(rangeIcon);
085 }
086
087 return super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
088 }
089 }