使用paintComponent()方法繪製的各種Button：
正常狀態：
獲得焦點狀態：
被按下狀態：
被釋放狀態：
實現代碼：
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.font.LineMetrics;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
@SuppressWarnings("serial")
public class JButton_Bg extends JFrame {
public JButton_Bg() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// TODO Auto-generated constructor stub
Container c = getContentPane();
c.setLayout(new FlowLayout());
final JButton button = new MyButton("button 2");
c.add(button);
JButton button2 = new JButton("button 2");
c.add(button2);
button2.setBackground(Color.blue);
JButton button3 = new MyButton2("Cancel");
c.add(button3);
// 完全重繪的Button，其Text的HTML設置特性消失
// JButton button4 = new
// MyButton3("<html><font size=12>Sub</font></html>");
JButton button4 = new MyButton3("Sub");
// button4.setFont(new Font("Serif", Font.PLAIN, 14));
c.add(button4);
}
private class MyButton extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// 無參構造繼承時自動調用，而有參構造繼承時則需手動重寫
MyButton(String text) {
// super("<html><font size=5>" + text + "</font></html>");
super(text);
this.text = text;
// 下 面的代碼塊若是放到下面的paintComponent()方法裏則Swing界面初始化時，
// 佈局管理器還是採用的是系統默認的PreferredSize。因爲構造函數要優先於
// paintComponent()方法執行。
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getPreferredSize().width;
int height = this.getPreferredSize().height;
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height);
g2.fill(shape);
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2 + offsetCenter,
height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height, height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2)
+ offsetCenter,
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent()))
+ offsetCenter);
} else if (state.equals("released")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
// Gives the UI delegate an opportunity to define the precise shape of
// this component for the sake of mouse processing.
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
private class MyButton2 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// Initialize the size of the button according to the length and width
// of the text string
MyButton2(String text) {
super(text);
this.text = text;
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getWidth();
int height = this.getHeight();
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
private class MyButton3 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// Initialize the size of the button according to the length and width
// of the text string
MyButton3(String text) {
super(text);
this.text = text;
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getWidth();
int height = this.getHeight();
if (state.equals("normal")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
g2.setColor(new Color(0, 147, 255));
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
double borderWidth = 2.0f; // 2 pixels
g2.fill(new RoundRectangle2D.Double(borderWidth, borderWidth,
width - borderWidth * 2.0f,
height - borderWidth * 2.0f, height - borderWidth
* 2.0f, height - borderWidth * 2.0f));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg frame = new JButton_Bg();
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
添加了背景圖片的Button：
顯然當按鈕大小改變時，背景圖片有失真。
實現代碼：
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.font.LineMetrics;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
@SuppressWarnings("serial")
public class JButton_Bg extends JFrame {
public JButton_Bg() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// TODO Auto-generated constructor stub
Container c = getContentPane();
c.setLayout(new FlowLayout());
final JButton button = new MyButton("button 2");
c.add(button);
JButton button2 = new JButton("button 2");
c.add(button2);
button2.setBackground(Color.blue);
JButton button3 = new MyButton2("Cancel");
c.add(button3);
// 完全重繪的Button，其Text的HTML設置特性消失
// JButton button4 = new
// MyButton3("<html><font size=12>Sub</font></html>");
JButton button4 = new MyButton3("Sub");
// button4.setFont(new Font("Serif", Font.PLAIN, 14));
c.add(button4);
}
private class MyButton extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// 無參構造繼承時自動調用，而有參構造繼承時則需手動重寫
MyButton(String text) {
// super("<html><font size=5>" + text + "</font></html>");
super(text);
this.text = text;
// 下 面的代碼塊若是放到下面的paintComponent()方法裏則Swing界面初始化時，
// 佈局管理器還是採用的是系統默認的PreferredSize。因爲構造函數要優先於
// paintComponent()方法執行。
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getPreferredSize().width;
int height = this.getPreferredSize().height;
BufferedImage img;
try {
img = ImageIO.read(this.getClass().getResource(
"/images/icon.jpg"));
g2.drawImage(img, 0, 0, width, height, this);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height);
g2.fill(shape);
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2 + offsetCenter,
height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height, height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2)
+ offsetCenter,
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent()))
+ offsetCenter);
} else if (state.equals("released")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
// Gives the UI delegate an opportunity to define the precise shape of
// this component for the sake of mouse processing.
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
private class MyButton2 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// Initialize the size of the button according to the length and width
// of the text string
MyButton2(String text) {
super(text);
this.text = text;
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getWidth();
int height = this.getHeight();
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
private class MyButton3 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
Shape shape;
// Initialize the size of the button according to the length and width
// of the text string
MyButton3(String text) {
super(text);
this.text = text;
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int width = this.getWidth();
int height = this.getHeight();
if (state.equals("normal")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
g2.setColor(new Color(0, 147, 255));
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
double borderWidth = 2.0f; // 2 pixels
g2.fill(new RoundRectangle2D.Double(borderWidth, borderWidth,
width - borderWidth * 2.0f,
height - borderWidth * 2.0f, height - borderWidth
* 2.0f, height - borderWidth * 2.0f));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new RoundRectangle2D.Double(0, 0, width, height,
height, height));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
repaint();
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
repaint();
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被按下，");
state = "pressed";
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.print("鼠標按鍵被釋放，");
state = "released";
repaint();
}
});
}
@Override
public boolean contains(int x, int y) {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg frame = new JButton_Bg();
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
其中的核心修改代碼：
使用基於Nimbus包的Customize出屬於自己的Look
and Feel：
使用Painter可以保留按鈕的HTML特性（因爲自己不需要重畫 Text）
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.Painter;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;
/**
* 使用了Nimbus的個性化組件方法。使用Painter可以保留按鈕的HTML特性（因爲自己不需要重畫 Text）。
*
* @see JButton_Bg
* @author HAN
*
*/
@SuppressWarnings("serial")
public class JButton_Bg_2 extends JFrame {
static JButton button;
static JButton buttonBg;
static JButton buttonExtended1;
static JButton buttonExtended2;
static JButton buttonExtended3;
public JButton_Bg_2() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Container c = getContentPane();
c.setLayout(new FlowLayout());
button = new JButton("button");
c.add(button);
buttonBg = new JButton("button");
c.add(buttonBg);
buttonBg.setBackground(Color.blue);
buttonExtended1 = new JButtonExtended1("OK");
buttonExtended1.setForeground(Color.GREEN);
c.add(buttonExtended1);
buttonExtended2 = new JButtonExtended2("<html><u>C</u>ancel</html>");
c.add(buttonExtended2);
buttonExtended3 = new JButtonExtended3("Sub");
c.add(buttonExtended3);
}
private class JButtonExtended1 extends JButton {
Shape shape;
JButtonExtended1(String text) {
super(text);
// 設置按鈕默認文本顏色爲紅色
this.setForeground(Color.RED);
// 設置按鈕默認區域爲正方形
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new Ellipse2D.Double(
width / 2 - height / 2, 0, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2,
0, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2,
0, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2
+ offsetCenter, height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height,
height));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
private class JButtonExtended2 extends JButton {
Shape shape;
JButtonExtended2(String text) {
super(text);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
// sliderDefaults.put("Button.defaultButtonFollowsFocus", false);
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
// // Rendering operations have no effect outside of
// // the clipping area.
// g.setClip(0, 0, height, height);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width,
height, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
private class JButtonExtended3 extends JButton {
Shape shape;
JButtonExtended3(String text) {
super(text);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width,
height, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
g.setColor(new Color(0, 147, 255));
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
double borderWidth = 0.0f; // 0 pixels, no border
g.fill(new RoundRectangle2D.Double(borderWidth,
borderWidth, width - borderWidth * 2.0f,
height - borderWidth * 2.0f, height
- borderWidth * 2.0f, height
- borderWidth * 2.0f));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg_2 frame = new JButton_Bg_2();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// If you want to ensure that a particular component gains the focus
// the first time a window is activated, you can call the
// requestFocusInWindow method on the component after the component
// has been realized, but before the frame is displayed.
frame.pack(); // Realize the components.
// This button will have the initial focus.
buttonExtended2.requestFocusInWindow();
frame.setVisible(true);// Display the window.
}
}
下面的只是對以上總共3種方法做了代碼優化：
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.font.LineMetrics;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
/**
* 使用了重繪JButton的個性化組件方法。使用paint()不可以保留按鈕的HTML特性（因爲目前自己
* 還沒找到怎麼畫帶HTML特性的String的方法）。
* <p>
* 採用了fire JButton的ActionEvent方法來畫各種不同的按鈕狀態。
*
* @see JButton_Bg_2
* @see JButton_Bg_3
* @author HAN
*
*/
@SuppressWarnings("serial")
public class JButton_Bg extends JFrame {
public JButton_Bg() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// TODO Auto-generated constructor stub
Container c = getContentPane();
c.setLayout(new FlowLayout());
final JButton button = new MyButton("button 2");
c.add(button);
JButton button2 = new JButton("button 2");
c.add(button2);
button2.setBackground(Color.blue);
JButton button3 = new MyButton2("Cancel");
c.add(button3);
// 完全重繪的Button，其Text的HTML設置特性消失
// JButton button4 = new
// MyButton3("<html><font size=12>Sub</font></html>");
JButton button4 = new MyButton3("Sub");
// button4.setFont(new Font("Serif", Font.PLAIN, 14));
c.add(button4);
}
private class MyButton extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
private int width;
private int height;
private Shape shape;
// 無參構造繼承時自動調用，而有參構造繼承時則需手動重寫
MyButton(String text) {
// super("<html><font size=5>" + text + "</font></html>");
super(text);
this.text = text;
// 下面的代碼塊若是放到下面的paintComponent()方法裏則Swing界面初始化時，
// 佈局管理器還是採用的是系統默認的PreferredSize。因爲構造函數要優先於
// paintComponent()方法執行。
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
// 自定義鼠標熱點區域shape
width = getPreferredSize().width;
height = getPreferredSize().height;
shape = new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height);
}
@Override
protected void paintComponent(Graphics g) {
System.out.println("paintComponent");
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2 + offsetCenter,
height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height, height));
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2)
+ offsetCenter,
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent()))
+ offsetCenter);
} else if (state.equals("released")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
g2.setColor(Color.RED);
Font defaultFont = getFont();
g2.setFont(defaultFont);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
// repaint();// 可有可無，因爲鼠標事件本身自動觸發paintComponent()
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被按下，");
state = "pressed";
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被釋放，");
state = "released";
}
});
}
// Gives the UI delegate an opportunity to define the precise shape of
// this component for the sake of mouse processing.
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
private class MyButton2 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
private int width;
private int height;
private Shape shape;
MyButton2(String text) {
super(text);
this.text = text;
// 自定義鼠標熱點區域shape
this.width = getPreferredSize().width;
this.height = getPreferredSize().height;
this.shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被按下，");
state = "pressed";
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被釋放，");
state = "released";
}
});
}
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
private class MyButton3 extends JButton {
private String text;
private String state = "normal";
// private String state = "focused";
// private String state = "pressed";
// private String state = "released";
private int width;
private int height;
private Shape shape;
MyButton3(String text) {
super(text);
this.text = text;
// 自定義鼠標熱點區域shape
this.width = getPreferredSize().width;
this.height = getPreferredSize().height;
this.shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (state.equals("normal")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("focused")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("pressed")) {
// draw background pattern
g2.setColor(new Color(0, 147, 255));
g2.fill(shape);
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
double borderWidth = 2.0f; // 2 pixels
g2.fill(new RoundRectangle2D.Double(borderWidth, borderWidth,
width - borderWidth * 2.0f,
height - borderWidth * 2.0f, height - borderWidth
* 2.0f, height - borderWidth * 2.0f));
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
} else if (state.equals("released")) {
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
// draw string text
Font defaultFont = getFont();
g2.setFont(defaultFont);
g2.setColor(Color.BLACK);
Rectangle2D rect = defaultFont.getStringBounds(text,
g2.getFontRenderContext());
LineMetrics lineMetrics = defaultFont.getLineMetrics(text,
g2.getFontRenderContext());
g2.drawString(
text,
(float) (width / 2 - rect.getWidth() / 2),
(float) ((height / 2) + ((lineMetrics.getAscent() + lineMetrics
.getDescent()) / 2 - lineMetrics.getDescent())));
}
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移入組件");
state = "focused";
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("光標移出組件");
state = "normal";
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被按下，");
state = "pressed";
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("鼠標按鍵被釋放，");
state = "released";
}
});
}
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg frame = new JButton_Bg();
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
/**
* 使用了重繪JButton的個性化組件方法。使用paint()保留了按鈕的HTML特性（因爲通過 setContentAreafilled(false) +
* super.paintComponent(g) 這一方法使我們不需畫帶HTML特性的String）。
* <p>
* 採用了JButton的getModel()方法（State model for buttons.）來畫各種不同的按鈕狀態。
*
* @see JButton_Bg
* @see JButton_Bg_3
* @author HAN
*
*/
@SuppressWarnings("serial")
public class JButton_Bg_2 extends JFrame {
public JButton_Bg_2() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// TODO Auto-generated constructor stub
Container c = getContentPane();
c.setLayout(new FlowLayout());
final JButton button = new MyButton("button 2");
System.out.println(button.isPreferredSizeSet());
c.add(button);
JButton button2 = new JButton("button 2");
c.add(button2);
button2.setBackground(Color.blue);
System.out.println(button2.isPreferredSizeSet());
JButton button3 = new MyButton2("Cancel");
c.add(button3);
// 完全重繪的Button，其Text的HTML設置特性消失
// JButton button4 = new
// MyButton3("<html><font size=12>Sub</font></html>");
JButton button4 = new MyButton3("<html>Su<u>b</u></html>");
// button4.setFont(new Font("Serif", Font.PLAIN, 14));
c.add(button4);
}
private class MyButton extends JButton {
private int width;
private int height;
private Shape shape;
// 無參構造繼承時自動調用，而有參構造繼承時則需手動重寫
MyButton(String text) {
super(text);
setContentAreaFilled(false);
setForeground(Color.RED);
// 下面的代碼塊若是放到下面的paintComponent()方法裏則Swing界面初始化時，
// 佈局管理器還是採用的是系統默認的PreferredSize。因爲構造函數要優先於
// paintComponent()方法執行。
// 變方形按鈕爲圓形
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
// 自定義鼠標熱點區域shape
width = getPreferredSize().width;
height = getPreferredSize().height;
shape = new Ellipse2D.Double(width / 2 - height / 2, 0, height,
height);
}
@Override
protected void paintComponent(Graphics g) {
System.out.println();
System.out.print("paintComponent\t");
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (this.getModel().isEnabled()) {
System.out.print("isEnabled\t");
if (this.getModel().isRollover()) {
System.out.print("isRollover\t");
if (this.getModel().isPressed()) {
System.out.print("isPressed\t");
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2
+ offsetCenter, height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
g2.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height, height));
} else {
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
} else {
System.out.print("Normal\t");
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
}
super.paintComponent(g);
}
// Gives the UI delegate an opportunity to define the precise shape of
// this component for the sake of mouse processing.
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
private class MyButton2 extends JButton {
private int width;
private int height;
private Shape shape;
MyButton2(String text) {
super(text);
setContentAreaFilled(false);
// 自定義鼠標熱點區域shape
this.width = getPreferredSize().width;
this.height = getPreferredSize().height;
this.shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
}
protected void paintComponent(Graphics g) {
System.out.println();
System.out.print("paintComponent\t");
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (this.getModel().isEnabled()) {
System.out.print("isEnabled\t");
if (this.getModel().isRollover()) {
System.out.print("isRollover\t");
if (this.getModel().isPressed()) {
System.out.print("isPressed\t");
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
} else {
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
} else {
System.out.print("Normal\t");
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
}
super.paintComponent(g);
}
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
private class MyButton3 extends JButton {
private int width;
private int height;
private Shape shape;
MyButton3(String text) {
super(text);
setContentAreaFilled(false);
// 自定義鼠標熱點區域shape
this.width = getPreferredSize().width;
this.height = getPreferredSize().height;
this.shape = new RoundRectangle2D.Double(0, 0, width, height,
height, height);
}
protected void paintComponent(Graphics g) {
System.out.println();
System.out.print("paintComponent\t");
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
if (this.getModel().isEnabled()) {
System.out.print("isEnabled\t");
if (this.getModel().isRollover()) {
System.out.print("isRollover\t");
if (this.getModel().isPressed()) {
System.out.print("isPressed\t");
// draw background pattern
g2.setColor(new Color(0, 147, 255));
g2.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
double borderWidth = 2.0f; // 2 pixels
g2.fill(new RoundRectangle2D.Double(borderWidth,
borderWidth, width - borderWidth * 2.0f, height
- borderWidth * 2.0f, height
- borderWidth * 2.0f, height
- borderWidth * 2.0f));
} else {
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
} else {
System.out.print("Normal\t");
// draw background pattern
Point2D center = new Point2D.Float(width / 2, height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(center,
radius, dist, colors);
g2.setPaint(paint);
g2.fill(shape);
}
}
super.paintComponent(g);
}
@Override
public boolean contains(int x, int y) {
return shape.contains(x, y);
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg_2 frame = new JButton_Bg_2();
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
package com.han;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.Painter;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;
/**
* 使用了Nimbus的個性化組件方法。使用Painter可以保留按鈕的HTML特性（因爲自己不需要重畫 Text）。
*
* @see JButton_Bg
* @see JButton_Bg_2
* @author HAN
*
*/
@SuppressWarnings("serial")
public class JButton_Bg_3 extends JFrame {
static JButton button;
static JButton buttonBg;
static JButton buttonExtended1;
static JButton buttonExtended2;
static JButton buttonExtended3;
public JButton_Bg_3() {
for (LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if (laf.getName().equals("Nimbus")) {
try {
UIManager.setLookAndFeel(laf.getClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Container c = getContentPane();
c.setLayout(new FlowLayout());
button = new JButton("button");
c.add(button);
buttonBg = new JButton("button");
c.add(buttonBg);
buttonBg.setBackground(Color.blue);
buttonExtended1 = new JButtonExtended1("OK");
buttonExtended1.setForeground(Color.GREEN);
c.add(buttonExtended1);
buttonExtended2 = new JButtonExtended2("<html><u>C</u>ancel</html>");
c.add(buttonExtended2);
buttonExtended3 = new JButtonExtended3("Sub");
c.add(buttonExtended3);
}
private class JButtonExtended1 extends JButton {
private Shape shape;
JButtonExtended1(String text) {
super(text);
// 設置按鈕默認文本顏色爲紅色
this.setForeground(Color.RED);
// 設置按鈕默認區域爲正方形
Dimension preferredSize = getPreferredSize();
Dimension preferredSizeNew = new Dimension(preferredSize.width,
preferredSize.width);
setPreferredSize(preferredSizeNew);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new Ellipse2D.Double(
width / 2 - height / 2, 0, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2,
0, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2,
0, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
int offsetCenter = 1;
Point2D center = new Point2D.Float(width / 2
+ offsetCenter, height / 2 + offsetCenter);
float radius = height / 2;
float[] dist = { 0.2f, 1.0f };
Color[] colors = { new Color(0, 0, 0, 255),
new Color(255, 255, 255, 0) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new Ellipse2D.Double(width / 2 - height / 2
+ offsetCenter, offsetCenter, height,
height));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
private class JButtonExtended2 extends JButton {
Shape shape;
JButtonExtended2(String text) {
super(text);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
// sliderDefaults.put("Button.defaultButtonFollowsFocus", false);
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
// // Rendering operations have no effect outside of
// // the clipping area.
// g.setClip(0, 0, height, height);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width,
height, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
private class JButtonExtended3 extends JButton {
Shape shape;
JButtonExtended3(String text) {
super(text);
/* customize button */
UIDefaults sliderDefaults = new UIDefaults();
sliderDefaults.put("Button.contentMargins",
new Insets(6, 14, 6, 14));
sliderDefaults.put("Button[Enabled].backgroundPainter",
new Painter<JComponent>() {
public void paint(Graphics2D g, JComponent c,
int width, int height) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(0, 0, 0, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
shape = new RoundRectangle2D.Double(0, 0, width,
height, height, height);
g.fill(shape);
}
});
sliderDefaults.put("Button[MouseOver].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused].backgroundPainter",
new Painter<JComponent>() {
// The paint is the same as MouseOver
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 0.8f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
}
});
sliderDefaults.put("Button[Focused+Pressed].backgroundPainter",
new Painter<JComponent>() {
@Override
public void paint(Graphics2D g, JComponent object,
int width, int height) {
// TODO Auto-generated method stub
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// draw background pattern
g.setColor(new Color(0, 147, 255));
g.fill(new RoundRectangle2D.Double(0, 0, width,
height, height, height));
Point2D center = new Point2D.Float(width / 2,
height / 2);
float radius = width / 2;
float[] dist = { 0.0f, 1.0f };
Color[] colors = { new Color(255, 255, 255, 0),
new Color(20, 20, 20, 255) };
RadialGradientPaint paint = new RadialGradientPaint(
center, radius, dist, colors);
g.setPaint(paint);
double borderWidth = 0.0f; // 0 pixels, no border
g.fill(new RoundRectangle2D.Double(borderWidth,
borderWidth, width - borderWidth * 2.0f,
height - borderWidth * 2.0f, height
- borderWidth * 2.0f, height
- borderWidth * 2.0f));
}
});
this.putClientProperty("Nimbus.Overrides", sliderDefaults);
// replace the defaults
this.putClientProperty("Nimbus.Overrides.InheritDefaults", false);
}
@Override
public boolean contains(int x, int y) {
try {
if (shape.contains(x, y)) {
return true;
} else {
return false;
}
} catch (NullPointerException e) {
System.out.println("NullPointerException");
}
return super.contains(x, y);
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
JButton_Bg_3 frame = new JButton_Bg_3();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// If you want to ensure that a particular component gains the focus
// the first time a window is activated, you can call the
// requestFocusInWindow method on the component after the component
// has been realized, but before the frame is displayed.
frame.pack(); // Realize the components.
// This button will have the initial focus.
buttonExtended2.requestFocusInWindow();
frame.setVisible(true);// Display the window.
}
}
