001 /*
002 * $Id: ListRolloverController.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.JList;
028 import javax.swing.ListCellRenderer;
029
030
031 /**
032 * listens to rollover properties. Repaints effected component regions.
033 * Updates link cursor.
034 *
035 * @author Jeanette Winzenburg
036 */
037 public class ListRolloverController<T extends JList> extends
038 RolloverController<T> {
039
040 private Cursor oldCursor;
041
042 // --------------------------------- JList rollover
043
044 @Override
045 protected void rollover(Point oldLocation, Point newLocation) {
046 // PENDING JW - track down the -1 in location.y
047 if (oldLocation != null) {
048 Rectangle r = component.getCellBounds(oldLocation.y, oldLocation.y);
049 // LOG.info("old index/cellbounds: " + index + "/" + r);
050 if (r != null) {
051 component.repaint(r);
052 }
053 }
054 if (newLocation != null) {
055 Rectangle r = component.getCellBounds(newLocation.y, newLocation.y);
056 // LOG.info("new index/cellbounds: " + index + "/" + r);
057 if (r != null) {
058 component.repaint(r);
059 }
060 }
061 setRolloverCursor(newLocation);
062 }
063
064 /**
065 * something weird: cursor in JList behaves different from JTable?
066 * Hmm .. no: using the table code snippets seems to fix #503-swingx
067 * @param location
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 // if (hasRollover(location)) {
083 // oldCursor = component.getCursor();
084 // component.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
085 // } else {
086 // component.setCursor(oldCursor);
087 // oldCursor = null;
088 // }
089
090 }
091
092 @Override
093 protected RolloverRenderer getRolloverRenderer(Point location,
094 boolean prepare) {
095 ListCellRenderer renderer = component.getCellRenderer();
096 RolloverRenderer rollover = renderer instanceof RolloverRenderer
097 ? (RolloverRenderer) renderer : null;
098 if ((rollover != null) && !rollover.isEnabled()) {
099 rollover = null;
100 }
101 if ((rollover != null) && prepare) {
102 Object element = component.getModel().getElementAt(location.y);
103 renderer.getListCellRendererComponent(component, element,
104 location.y, false, true);
105 }
106 return rollover;
107 }
108
109 @Override
110 protected Point getFocusedCell() {
111 int leadRow = component.getLeadSelectionIndex();
112 if (leadRow < 0)
113 return null;
114 return new Point(0, leadRow);
115 }
116
117 }