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 1.3 2005/10/18 13:18:34 mungady 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:
048: import javax.swing.AbstractButton;
049:
050: /**
051: * Enables a button to have a simple floating effect. The border of the button is only visible,
052: * when the mouse pointer is floating over the button.
053: *
054: * @author Thomas Morgner
055: */
056: public final class FloatingButtonEnabler extends MouseAdapter {
057:
058: /** A single instance. */
059: private static FloatingButtonEnabler singleton;
060:
061: /**
062: * Default constructor.
063: */
064: private FloatingButtonEnabler() {
065: // nothing required
066: }
067:
068: /**
069: * Returns a default instance of this enabler.
070: *
071: * @return a shared instance of this class.
072: */
073: public static FloatingButtonEnabler getInstance() {
074: if (singleton == null) {
075: singleton = new FloatingButtonEnabler();
076: }
077: return singleton;
078: }
079:
080: /**
081: * Adds a button to this enabler.
082: *
083: * @param button the button.
084: */
085: public void addButton(final AbstractButton button) {
086: button.addMouseListener(this );
087: button.setBorderPainted(false);
088: }
089:
090: /**
091: * Removes a button from the enabler.
092: *
093: * @param button the button.
094: */
095: public void removeButton(final AbstractButton button) {
096: button.addMouseListener(this );
097: button.setBorderPainted(true);
098: }
099:
100: /**
101: * Triggers the drawing of the border when the mouse entered the button area.
102: *
103: * @param e the mouse event.
104: */
105: public void mouseEntered(final MouseEvent e) {
106: if (e.getSource() instanceof AbstractButton) {
107: final AbstractButton button = (AbstractButton) e
108: .getSource();
109: if (button.isEnabled()) {
110: button.setBorderPainted(true);
111: }
112: }
113: }
114:
115: /**
116: * Disables the drawing of the border when the mouse leaves the button area.
117: *
118: * @param e the mouse event.
119: */
120: public void mouseExited(final MouseEvent e) {
121: if (e.getSource() instanceof AbstractButton) {
122: final AbstractButton button = (AbstractButton) e
123: .getSource();
124: button.setBorderPainted(false);
125: if (button.getParent() != null) {
126: // button.getParent().repaint(button.getX(), button.getY(),
127: // button.getWidth(), button.getHeight());
128: button.getParent().repaint();
129: }
130: }
131: }
132:
133: }
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