我尝试了许多不同的方法来解决类似的问题。
遍历组件层次结构并禁用每个组件的问题是您破坏了任何上下文并规避了对这些组件的管理。
基本上，如果某些子组件在您重新启用容器时需要保持禁用状态，您就会突然陷入多重责任交织的问题......
迄今为止我发现的最佳解决方案是简单地使用JXLayer，它提供了“可锁定”层概念，允许您“锁定”单个容器，防止用户与之交互，例如...... .
这是直接取自 JXLayer 演示代码...
/**
* Copyright (c) 2006-2008, Alexander Potochkin
* All rights reserved.
*/
package org.jdesktop.jxlayer.demo;
import com.jhlabs.image.BlurFilter;
import com.jhlabs.image.EmbossFilter;
import org.jdesktop.jxlayer.JXLayer;
import org.jdesktop.jxlayer.demo.util.LafMenu;
import org.jdesktop.jxlayer.plaf.effect.BufferedImageOpEffect;
import org.jdesktop.jxlayer.plaf.effect.LayerEffect;
import org.jdesktop.jxlayer.plaf.ext.LockableUI;
import org.jdesktop.swingx.painter.BusyPainter;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Ellipse2D;
/**
* A demo to show the abilities of the {@link LockableUI}.
*
* @see BusyPainterUI
*/
public class LockableDemo extends JFrame {
private JXLayer<JComponent> layer;
private LockableUI blurUI =
new LockableUI(new BufferedImageOpEffect(new BlurFilter()));
private EnhancedLockableUI embossUI =
new EnhancedLockableUI(new BufferedImageOpEffect(new EmbossFilter()));
private LockableUI busyPainterUI = new BusyPainterUI();
private JCheckBoxMenuItem disablingItem =
new JCheckBoxMenuItem(new AbstractAction("Lock the layer") {
public void actionPerformed(ActionEvent e) {
blurItem.setEnabled(!disablingItem.isSelected());
embossItem.setEnabled(!disablingItem.isSelected());
busyPainterItem.setEnabled(!disablingItem.isSelected());
blurUI.setLocked(disablingItem.isSelected());
embossUI.setLocked(disablingItem.isSelected());
busyPainterUI.setLocked(disablingItem.isSelected());
}
});
private JRadioButtonMenuItem blurItem = new JRadioButtonMenuItem("Blur effect");
private JRadioButtonMenuItem embossItem = new JRadioButtonMenuItem("Unlock button");
private JRadioButtonMenuItem busyPainterItem = new JRadioButtonMenuItem("BusyPainter");
public LockableDemo() {
super("Lockable layer demo");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent view = createLayerPanel();
layer = new JXLayer<JComponent>(view);
layer.setUI(blurUI);
add(layer);
add(createToolPanel(), BorderLayout.EAST);
setJMenuBar(createMenuBar());
setSize(380, 300);
setLocationRelativeTo(null);
}
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new LockableDemo().setVisible(true);
}
});
}
private JMenuBar createMenuBar() {
JMenu menu = new JMenu("Menu");
disablingItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_D, InputEvent.ALT_MASK));
menu.add(disablingItem);
menu.addSeparator();
blurItem.setSelected(true);
blurItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_1, InputEvent.ALT_MASK));
menu.add(blurItem);
embossItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_2, InputEvent.ALT_MASK));
menu.add(embossItem);
busyPainterItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_3, InputEvent.ALT_MASK));
menu.add(busyPainterItem);
ButtonGroup group = new ButtonGroup();
group.add(blurItem);
group.add(embossItem);
group.add(busyPainterItem);
ItemListener menuListener = new ItemListener() {
public void itemStateChanged(ItemEvent e) {
if (blurItem.isSelected()) {
layer.setUI(blurUI);
} else if (embossItem.isSelected()) {
layer.setUI(embossUI);
} else if (busyPainterItem.isSelected()) {
layer.setUI(busyPainterUI);
}
}
};
blurItem.addItemListener(menuListener);
embossItem.addItemListener(menuListener);
busyPainterItem.addItemListener(menuListener);
embossUI.getUnlockButton().addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
disablingItem.doClick();
}
});
JMenuBar bar = new JMenuBar();
bar.add(menu);
bar.add(new LafMenu());
return bar;
}
private JComponent createLayerPanel() {
JComponent panel = new JPanel();
panel.add(new JCheckBox("JCheckBox"));
panel.add(new JRadioButton("JRadioButton"));
panel.add(new JTextField(15));
JButton button = new JButton("Have a nice day");
button.setMnemonic('H');
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(LockableDemo.this,
"actionPerformed");
}
});
panel.add(button);
panel.add(new JTextField(15));
panel.add(new JCheckBox("JCheckBox"));
panel.add(new JRadioButton("JRadioButton"));
panel.add(new JTextField(15));
panel.add(new JCheckBox("JCheckBox"));
panel.add(new JRadioButton("JRadioButton"));
panel.setBorder(BorderFactory.createEtchedBorder());
return panel;
}
private JComponent createToolPanel() {
JComponent box = Box.createVerticalBox();
JCheckBox button = new JCheckBox(disablingItem.getText());
button.setModel(disablingItem.getModel());
box.add(Box.createGlue());
box.add(button);
box.add(Box.createGlue());
JRadioButton blur = new JRadioButton(blurItem.getText());
blur.setModel(blurItem.getModel());
box.add(blur);
JRadioButton emboss = new JRadioButton(embossItem.getText());
emboss.setModel(embossItem.getModel());
box.add(emboss);
JRadioButton translucent = new JRadioButton(busyPainterItem.getText());
translucent.setModel(busyPainterItem.getModel());
box.add(translucent);
box.add(Box.createGlue());
return box;
}
/**
* Subclass of the {@link LockableUI} which shows a button
* that allows to unlock the {@link JXLayer} when it is locked
*/
public static class EnhancedLockableUI extends LockableUI {
private JButton unlockButton = new JButton("Unlock");
public EnhancedLockableUI(LayerEffect... lockedEffects) {
super(lockedEffects);
unlockButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setLocked(false);
}
});
unlockButton.setVisible(false);
}
public AbstractButton getUnlockButton() {
return unlockButton;
}
@Override
@SuppressWarnings("unchecked")
public void installUI(JComponent c) {
super.installUI(c);
JXLayer<JComponent> l = (JXLayer<JComponent>) c;
l.getGlassPane().setLayout(new GridBagLayout());
l.getGlassPane().add(unlockButton);
unlockButton.setCursor(Cursor.getDefaultCursor());
}
@Override
@SuppressWarnings("unchecked")
public void uninstallUI(JComponent c) {
super.uninstallUI(c);
JXLayer<JComponent> l = (JXLayer<JComponent>) c;
l.getGlassPane().setLayout(new FlowLayout());
l.getGlassPane().remove(unlockButton);
}
public void setLocked(boolean isLocked) {
super.setLocked(isLocked);
unlockButton.setVisible(isLocked);
}
}
/**
* Subclass of the {@link LockableUI} which uses the {@link BusyPainterUI}
* from the SwingX project to implement the "busy effect"
* when {@link JXLayer} is locked.
*/
public static class BusyPainterUI extends LockableUI
implements ActionListener {
private BusyPainter busyPainter;
private Timer timer;
private int frameNumber;
public BusyPainterUI() {
busyPainter = new BusyPainter() {
protected void doPaint(Graphics2D g, JComponent object,
int width, int height) {
// centralize the effect
Rectangle r = getTrajectory().getBounds();
int tw = width - r.width - 2 * r.x;
int th = height - r.height - 2 * r.y;
g.translate(tw / 2, th / 2);
super.doPaint(g, object, width, height);
}
};
busyPainter.setPointShape(new Ellipse2D.Double(0, 0, 20, 20));
busyPainter.setTrajectory(new Ellipse2D.Double(0, 0, 100, 100));
timer = new Timer(100, this);
}
@Override
protected void paintLayer(Graphics2D g2, JXLayer<? extends JComponent> l) {
super.paintLayer(g2, l);
if (isLocked()) {
busyPainter.paint(g2, l, l.getWidth(), l.getHeight());
}
}
@Override
public void setLocked(boolean isLocked) {
super.setLocked(isLocked);
if (isLocked) {
timer.start();
} else {
timer.stop();
}
}
// Change the frame for the busyPainter
// and mark BusyPainterUI as dirty
public void actionPerformed(ActionEvent e) {
frameNumber = (frameNumber + 1) % 8;
busyPainter.setFrame(frameNumber);
// this will repaint the layer
setDirty(true);
}
}
}