在根容器中分层多个 GlassPane [英] Layering multiple GlassPane's in a Root Container
问题描述
是否可以为单个 JFrame 添加多个 GlassPane，或者我是否必须将不舒服的 LayeredPane 与 一起使用>Opacity 属性.
Is it possible to add multiple GlassPanes for a single JFrame, or do I have to use the uncomfortable LayeredPane with the Opacity attribute.
我附上了一些显示我想要做什么的代码(由@camickr 提供).
I have attached some code that shows what I want to do (provided by @camickr).
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();
}
});
}
}
推荐答案
看http://docs.oracle.com/javase/tutorial/uiswing/components/rootpane.html 了解根窗格和玻璃窗格的实际含义.
Look at http://docs.oracle.com/javase/tutorial/uiswing/components/rootpane.html for an explanation on Root panes and what the Glass pane actually is.
玻璃窗格只是添加具有根窗格大小并阻止所有输入事件的组件的便捷方式.这允许您捕获与组件的任何交互以创建请稍候..."屏幕.
The glass pane is just a convenient way to add a component which has the size of the Root Pane, and which blocks all input events. This allows you to catch any interaction with your components to create a "Please wait..." screen.
每个根容器只有一个玻璃板.您不能将玻璃板分层.
There is only a single glass pane per root container. You cannot layer glass panes.
如果您想在当前玻璃窗格上叠加某些内容，可以用其他内容替换玻璃窗格的内容.您还可以将一个JPanel 设置为玻璃面板，这样您就可以在玻璃面板中布置多个组件.
You can replace the contents of the glass pane by something else if you want to layer something over the current glass pane. You can also set a JPanel as a glass pane, which allows you to layout multiple components in the glass pane.
通常，您应该只使用玻璃面板来阻止用户输入(并且，如有必要，显示某种请稍候"消息).您能否提供一个用例，说明为什么要将玻璃板叠在一起?
Usually, you should only use the glass pane to block user input (and, if necessary, display some kind of "please wait" message). Can you provide a use case of why you want to put glass panes on top of one another?
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