在根容器中分层多个GlassPane [英] Layering multiple GlassPane's in a Root Container

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本文介绍了在根容器中分层多个GlassPane的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

是否可以为单个 JFrame 添加多个 GlassPane ,或者我是否必须使用不舒服 LayeredPane ,带有不透明度属性。

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

看在 http://docs.oracle.com/javase/tutorial/uiswing/ components / rootpane.html 有关根窗格的说明以及Glass窗格实际上是什么。

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.

玻璃窗格只是添加组件的便捷方式它具有Root Pane的大小,并阻止所有输入事件。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窗格。 您无法对玻璃窗格进行分层

There is only a single glass pane per root container. You cannot layer glass panes.

如果要在当前玻璃上叠层,可以用其他内容替换玻璃窗格的内容窗格。您还可以将JPanel设置为玻璃窗格,它允许您在玻璃窗格中布局多个组件。

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,您应该只使用玻璃窗格来阻止用户输入(如有必要,显示某种请稍候的消息)。您能否提供一个用例,说明为什么要将玻璃窗格放在一起?

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?

这篇关于在根容器中分层多个GlassPane的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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