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是否可以为单个JFrame添加多个GlassPane，或者是否必须使用具有Opacity属性的令人不舒服的LayeredPane。在根容器中分层多个GlassPane
我附上了一些代码，显示了我想要做的事情（由@camickr提供）。
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
public class MultiplayGlassPane {
private static final long serialVersionUID = 1L;
private JFrame frame = new JFrame("frameTitle");
private JPanel fPanel = new JPanel();
private Random random = new Random();
private final static Border MESSAGE_BORDER = new EmptyBorder(10, 10, 10, 10);
private JLabel message = new JLabel();
private ArrayList<Star> stars = new ArrayList<Star>();
public MultiplayGlassPane() {
MyGlassPane glass = new MyGlassPane();
for (int i = 0; i < 35; i++) {
Star star = new Star(new Point(random.nextInt(580), random.nextInt(550)));
star.setColor(Color.orange);
star.setxIncr(-3 + random.nextInt(7));
star.setyIncr(-3 + random.nextInt(7));
glass.add(star);
}
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(glass, BorderLayout.CENTER);
frame.setLocation(20, 20);
frame.pack();
frame.setVisible(true);
DisabledGlassPane1 glassPane = new DisabledGlassPane1();
JRootPane rootPane = SwingUtilities.getRootPane(frame);
rootPane.setGlassPane(glassPane);
glassPane.activate("");
}
private class MyGlassPane extends JLabel {
private static final long serialVersionUID = 1L;
private ArrayList<Star> stars = new ArrayList<Star>();
private javax.swing.Timer timer = new javax.swing.Timer(20, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
for (Star star : stars) {
star.move();
}
repaint();
}
});
public void stopAnimation() {
if (timer.isRunning()) {
timer.stop();
}
}
public void startAnimation() {
if (!timer.isRunning()) {
timer.start();
}
}
@Override
public void addNotify() {
super.addNotify();
timer.start();
}
@Override
public void removeNotify() {
super.removeNotify();
timer.stop();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(new Dimension(620, 620));
}
public MyGlassPane() {
this.setPreferredSize(new Dimension(620, 620));
}
public void add(Star star) {
stars.add(star);
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
for (Star star : stars) {
g.setColor(star.getColor());
g.fillPolygon(star);
}
}
}
class DisabledGlassPane1 extends JComponent implements KeyListener {
private static final long serialVersionUID = 1L;
public DisabledGlassPane1() {
setOpaque(false);
Color base = UIManager.getColor("inactiveCaptionBorder");
Color background = new Color(base.getRed(), base.getGreen(), base.getBlue(), 128);
setBackground(background);
setLayout(new GridBagLayout());
add(message, new GridBagConstraints());
message.setOpaque(true);
message.setBorder(MESSAGE_BORDER);
addMouseListener(new MouseAdapter() {
});
addMouseMotionListener(new MouseMotionAdapter() {
});
addKeyListener(this);
setFocusTraversalKeysEnabled(false);
Random random = new Random();
for (int i = 0; i < 50; i++) {
Star star = new Star(new Point(random.nextInt(490), random.nextInt(490)));
star.setColor(Color.magenta);
star.setxIncr(-3 + random.nextInt(7));
star.setyIncr(-3 + random.nextInt(7));
add(star);
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
for (Star star : stars) {
g.setColor(star.getColor());
g.fillPolygon(star);
}
}
@Override
public void setBackground(Color background) {
super.setBackground(background);
Color messageBackground = new Color(background.getRGB());
message.setBackground(messageBackground);
}
public void keyPressed(KeyEvent e) {
e.consume();
}
public void keyTyped(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
e.consume();
}
public void activate(String text) {
if (text != null && text.length() > 0) {
message.setVisible(true);
message.setText(text);
message.setForeground(getForeground());
} else {
message.setVisible(false);
}
setVisible(true);
//setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
requestFocusInWindow();
}
public void deactivate() {
setCursor(null);
setVisible(false);
}
private javax.swing.Timer timer = new javax.swing.Timer(15, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
for (Star star : stars) {
star.move();
}
repaint();
}
});
public void stopAnimation() {
if (timer.isRunning()) {
timer.stop();
}
}
public void startAnimation() {
if (!timer.isRunning()) {
timer.start();
}
}
@Override
public void addNotify() {
super.addNotify();
timer.start();
}
@Override
public void removeNotify() {
super.removeNotify();
timer.stop();
}
public void add(Star star) {
stars.add(star);
}
}
private class Star extends Polygon {
private static final long serialVersionUID = 1L;
private Point location = null;
private Color color = Color.YELLOW;
private int xIncr, yIncr;
static final int WIDTH = 600, HEIGHT = 600;
Star(Point location) {
int x = location.x;
int y = location.y;
this.location = location;
this.addPoint(x, y + 8);
this.addPoint(x + 8, y + 8);
this.addPoint(x + 11, y);
this.addPoint(x + 14, y + 8);
this.addPoint(x + 22, y + 8);
this.addPoint(x + 17, y + 12);
this.addPoint(x + 21, y + 20);
this.addPoint(x + 11, y + 14);
this.addPoint(x + 3, y + 20);
this.addPoint(x + 6, y + 12);
}
public void setColor(Color color) {
this.color = color;
}
public void move() {
if (location.x < 0 || location.x > frame.getContentPane().getWidth() - 20) {
xIncr = -xIncr;
}
if (location.y < 0 || location.y > frame.getContentPane().getHeight() - 20) {
yIncr = -yIncr;
}
translate(xIncr, yIncr);
location.setLocation(location.x + xIncr, location.y + yIncr);
}
public void setxIncr(int xIncr) {
this.xIncr = xIncr;
}
public void setyIncr(int yIncr) {
this.yIncr = yIncr;
}
public Color getColor() {
return color;
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
MultiplayGlassPane Mpgp = new MultiplayGlassPane();
}
});
}
}
我不知道“Multiplaying”是什么。你能解释一下吗？ – parasietje 2012-01-13 16:23:04
@parasietje为一个JFrame创建＆声明并添加两个或更多GlassPanes，默认情况下，JFrame只有一个GlassPane/RootPane – mKorbel 2012-01-13 16:24:33
@Down_Voter可以请您分享原因吗？ – mKorbel 2012-01-13 16:31:05