001 /*
002 * $Id: TreeRolloverController.java 3100 2008-10-14 22:33:10Z rah003 $
003 *
004 * Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle,
005 * Santa Clara, California 95054, U.S.A. All rights reserved.
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
020 */
021 package org.jdesktop.swingx.rollover;
022
023 import java.awt.Cursor;
024 import java.awt.Point;
025 import java.awt.Rectangle;
026
027 import javax.swing.JTree;
028 import javax.swing.tree.TreeCellRenderer;
029 import javax.swing.tree.TreePath;
030
031
032 /**
033 * listens to rollover properties.
034 * Repaints effected component regions.
035 * Updates link cursor.
036 *
037 * @author Jeanette Winzenburg
038 */
039 public class TreeRolloverController<T extends JTree> extends RolloverController<T> {
040
041 private Cursor oldCursor;
042
043 // -------------------------------------JTree rollover
044
045 @Override
046 protected void rollover(Point oldLocation, Point newLocation) {
047 // JW: conditional repaint not working?
048 // component.repaint();
049 if (oldLocation != null) {
050 Rectangle r = component.getRowBounds(oldLocation.y);
051 if (r != null) {
052 r.x = 0;
053 r.width = component.getWidth();
054 component.repaint(r);
055 }
056 }
057 if (newLocation != null) {
058 Rectangle r = component.getRowBounds(newLocation.y);
059 if (r != null) {
060 r.x = 0;
061 r.width = component.getWidth();
062 component.repaint(r);
063 }
064 }
065 setRolloverCursor(newLocation);
066 }
067
068
069 private void setRolloverCursor(Point location) {
070 if (hasRollover(location)) {
071 if (oldCursor == null) {
072 oldCursor = component.getCursor();
073 component.setCursor(Cursor
074 .getPredefinedCursor(Cursor.HAND_CURSOR));
075 }
076 } else {
077 if (oldCursor != null) {
078 component.setCursor(oldCursor);
079 oldCursor = null;
080 }
081 }
082
083 }
084
085
086 @Override
087 protected RolloverRenderer getRolloverRenderer(Point location, boolean prepare) {
088 TreeCellRenderer renderer = component.getCellRenderer();
089 RolloverRenderer rollover = renderer instanceof RolloverRenderer
090 ? (RolloverRenderer) renderer : null;
091 if ((rollover != null) && !rollover.isEnabled()) {
092 rollover = null;
093 }
094 if ((rollover != null) && prepare) {
095 TreePath path = component.getPathForRow(location.y);
096 Object element = path != null ? path.getLastPathComponent() : null;
097 renderer.getTreeCellRendererComponent(component, element, false,
098 false, false,
099 location.y, false);
100 }
101 return rollover;
102 }
103
104
105 @Override
106 protected Point getFocusedCell() {
107 // TODO Auto-generated method stub
108 return null;
109 }
110
111 }