更好的方法是开发一个 ButtonUI. Swing 本身的 MVC 就是这样分的. 呵呵, 这样不影响原始的 JButton 的代码.
/**
* $ $ License.
*
* Copyright $ L2FProd.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.l2fprod.common.swing.plaf.blue;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.plaf.basic.BasicButtonUI;
/**
* BlueishButtonUI. <br>
*
*/
public class BlueishButtonUI
extends BasicButtonUI {
private static Color blueishBackgroundOver = new Color(224, 232, 246);
private static Color blueishBorderOver = new Color(152, 180, 226);
private static Color blueishBackgroundSelected = new Color(193, 210, 238);
private static Color blueishBorderSelected = new Color(49, 106, 197);
public BlueishButtonUI() {
super();
}
public void installUI(JComponent c) {
super.installUI(c);
AbstractButton button = (AbstractButton)c;
button.setRolloverEnabled(true);
button.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
}
public void paint(Graphics g, JComponent c) {
AbstractButton button = (AbstractButton)c;
if (button.getModel().isRollover()
|| button.getModel().isArmed()
|| button.getModel().isSelected()) {
Color oldColor = g.getColor();
if (button.getModel().isSelected()) {
g.setColor(blueishBackgroundSelected);
} else {
g.setColor(blueishBackgroundOver);
}
g.fillRect(0, 0, c.getWidth() - 1, c.getHeight() - 1);
if (button.getModel().isSelected()) {
g.setColor(blueishBorderSelected);
} else {
g.setColor(blueishBorderOver);
}
g.drawRect(0, 0, c.getWidth() - 1, c.getHeight() - 1);
g.setColor(oldColor);
}
super.paint(g, c);
}
}