001/* 002 * $Id: ListRolloverController.java 3707 2010-07-08 19:19:25Z kschaefe $ 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 */ 021package org.jdesktop.swingx.rollover; 022 023import java.awt.Cursor; 024import java.awt.Point; 025import java.awt.Rectangle; 026 027import javax.swing.JList; 028import 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 */ 037public class ListRolloverController<T extends JList> extends RolloverController<T> { 038 039 private Cursor oldCursor; 040 041 // --------------------------------- JList rollover 042 043 @Override 044 protected void rollover(Point oldLocation, Point newLocation) { 045 // PENDING JW - track down the -1 in location.y 046 if (oldLocation != null) { 047 Rectangle r = component.getCellBounds(oldLocation.y, oldLocation.y); 048 // LOG.info("old index/cellbounds: " + index + "/" + r); 049 if (r != null) { 050 component.repaint(r); 051 } 052 } 053 if (newLocation != null) { 054 Rectangle r = component.getCellBounds(newLocation.y, newLocation.y); 055 // LOG.info("new index/cellbounds: " + index + "/" + r); 056 if (r != null) { 057 component.repaint(r); 058 } 059 } 060 setRolloverCursor(newLocation); 061 } 062 063 /** 064 * something weird: cursor in JList behaves different from JTable? 065 * Hmm .. no: using the table code snippets seems to fix #503-swingx 066 * @param location 067 */ 068 private void setRolloverCursor(Point location) { 069 if (hasRollover(location)) { 070 if (oldCursor == null) { 071 oldCursor = component.getCursor(); 072 component.setCursor(Cursor 073 .getPredefinedCursor(Cursor.HAND_CURSOR)); 074 } 075 } else { 076 if (oldCursor != null) { 077 component.setCursor(oldCursor); 078 oldCursor = null; 079 } 080 } 081// if (hasRollover(location)) { 082// oldCursor = component.getCursor(); 083// component.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); 084// } else { 085// component.setCursor(oldCursor); 086// oldCursor = null; 087// } 088 089 } 090 091 @Override 092 protected RolloverRenderer getRolloverRenderer(Point location, 093 boolean prepare) { 094 ListCellRenderer renderer = component.getCellRenderer(); 095 RolloverRenderer rollover = renderer instanceof RolloverRenderer 096 ? (RolloverRenderer) renderer : null; 097 if ((rollover != null) && !rollover.isEnabled()) { 098 rollover = null; 099 } 100 if ((rollover != null) && prepare) { 101 Object element = component.getModel().getElementAt(location.y); 102 renderer.getListCellRendererComponent(component, element, 103 location.y, false, true); 104 } 105 return rollover; 106 } 107 108 @Override 109 protected Point getFocusedCell() { 110 int leadRow = component.getLeadSelectionIndex(); 111 if (leadRow < 0) 112 return null; 113 return new Point(0, leadRow); 114 } 115 116 }