001 /* ======================================================================== 002 * JCommon : a free general purpose class library for the Java(tm) platform 003 * ======================================================================== 004 * 005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 006 * 007 * Project Info: http://www.jfree.org/jcommon/index.html 008 * 009 * This library is free software; you can redistribute it and/or modify it 010 * under the terms of the GNU Lesser General Public License as published by 011 * the Free Software Foundation; either version 2.1 of the License, or 012 * (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but 015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 017 * License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public 020 * License along with this library; if not, write to the Free Software 021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 022 * USA. 023 * 024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 025 * in the United States and other countries.] 026 * 027 * ----------------- 028 * DetailEditor.java 029 * ----------------- 030 * (C) Copyright 2004, by Thomas Morgner and Contributors. 031 * 032 * Original Author: Thomas Morgner; 033 * Contributor(s): David Gilbert (for Object Refinery Limited); 034 * 035 * $Id: FloatingButtonEnabler.java,v 1.4 2007/11/02 17:50:36 taqua Exp $ 036 * 037 * Changes 038 * ------- 039 * 07-Jun-2004 : Added JCommon header (DG); 040 * 041 */ 042 043 package org.jfree.ui; 044 045 import java.awt.event.MouseAdapter; 046 import java.awt.event.MouseEvent; 047 import javax.swing.AbstractButton; 048 049 /** 050 * Enables a button to have a simple floating effect. The border of the button is only visible, 051 * when the mouse pointer is floating over the button. 052 * 053 * @author Thomas Morgner 054 */ 055 public final class FloatingButtonEnabler extends MouseAdapter { 056 057 /** A single instance. */ 058 private static FloatingButtonEnabler singleton; 059 060 /** 061 * Default constructor. 062 */ 063 private FloatingButtonEnabler() { 064 // nothing required 065 } 066 067 /** 068 * Returns a default instance of this enabler. 069 * 070 * @return a shared instance of this class. 071 */ 072 public static FloatingButtonEnabler getInstance() { 073 if (singleton == null) { 074 singleton = new FloatingButtonEnabler(); 075 } 076 return singleton; 077 } 078 079 /** 080 * Adds a button to this enabler. 081 * 082 * @param button the button. 083 */ 084 public void addButton(final AbstractButton button) { 085 button.addMouseListener(this); 086 button.setBorderPainted(false); 087 } 088 089 /** 090 * Removes a button from the enabler. 091 * 092 * @param button the button. 093 */ 094 public void removeButton(final AbstractButton button) { 095 button.addMouseListener(this); 096 button.setBorderPainted(true); 097 } 098 099 /** 100 * Triggers the drawing of the border when the mouse entered the button area. 101 * 102 * @param e the mouse event. 103 */ 104 public void mouseEntered(final MouseEvent e) { 105 if (e.getSource() instanceof AbstractButton) { 106 final AbstractButton button = (AbstractButton) e.getSource(); 107 if (button.isEnabled()) { 108 button.setBorderPainted(true); 109 } 110 } 111 } 112 113 /** 114 * Disables the drawing of the border when the mouse leaves the button area. 115 * 116 * @param e the mouse event. 117 */ 118 public void mouseExited(final MouseEvent e) { 119 if (e.getSource() instanceof AbstractButton) { 120 final AbstractButton button = (AbstractButton) e.getSource(); 121 button.setBorderPainted(false); 122 if (button.getParent() != null) 123 { 124 // button.getParent().repaint(button.getX(), button.getY(), 125 // button.getWidth(), button.getHeight()); 126 button.getParent().repaint(); 127 } 128 } 129 } 130 131 }