如何防止按钮弹出？
How to prevent button from popping up?
我正在尝试在 java 秋千中制作手风琴面板 browser.I 在面板中添加了一些按钮。
这是我的代码（我从代码中删除了一些按钮以使其更小，如果您在理解我的代码时遇到任何问题请告诉我）
public class AccordianTest {
JPanel getContent() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(new AccordianPanel().getPanel(), gbc);
panel.setBackground(Color.DARK_GRAY);
panel.setVisible(true);
return panel;
}
}
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
setLayout(null);
int childCount = 4;
Dimension d = new Dimension();
int h = 0;
String[] name = {"Navigation", "Settings", "New tab", "More Tools"};
for (int j = 0; j < childCount; j++) {
ChildPanel child = new ChildPanel(j + 1, ml, name[j]);
add(child);
d = child.getPreferredSize();
child.setBounds(0, h, d.width, d.height);
if (j < childCount - 1) {
h += ControlPanel.HEIGHT;
}
}
h += d.height;
setPreferredSize(new Dimension(d.width, h));
// Set z-order for children.
setZOrder();
}
private void setZOrder() {
Component[] c = getComponents();
for (int j = 0; j < c.length - 1; j++) {
setComponentZOrder(c[j], c.length - 1 - j);
}
}
private void setChildVisible(int indexToOpen) {
int[] indices = new int[0];
int travelLimit = 0;
if (visibleIndex < indexToOpen) {
travelLimit = ControlPanel.HEIGHT
- getComponent(visibleIndex).getHeight();
int n = indexToOpen - visibleIndex;
indices = new int[n];
for (int j = visibleIndex, k = 0; j < indexToOpen; j++, k++) {
indices[k] = j + 1;
}
} else if (visibleIndex > indexToOpen) {
travelLimit = getComponent(visibleIndex).getHeight()
- ControlPanel.HEIGHT;
int n = visibleIndex - indexToOpen;
indices = new int[n];
for (int j = indexToOpen, k = 0; j < visibleIndex; j++, k++) {
indices[k] = j + 1;
}
}
movePanels(indices, travelLimit);
visibleIndex = indexToOpen;
}
private void movePanels(final int[] indices, final int travel) {
movingComponents = true;
Thread thread = new Thread(new Runnable() {
public void run() {
Component[] c = getComponents();
int limit = travel > 0 ? travel : 0;
int count = travel > 0 ? 0 : travel;
int dy = travel > 0 ? 1 : -1;
while (count < limit) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
System.out.println("interrupted");
break;
}
for (int j = 0; j < indices.length; j++) {
int index = c.length - 1 - indices[j];
Point p = c[index].getLocation();
p.y += dy;
c[index].setLocation(p.x, p.y);
}
repaint();
count++;
}
movingComponents = false;
}
});
thread.setPriority(Thread.NORM_PRIORITY);
thread.start();
}
private MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
int index = ((ControlPanel) e.getSource()).id - 1;
if (!movingComponents) {
setChildVisible(index);
}
}
};
public JPanel getPanel() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(this, gbc);
return panel;
}
}
class ChildPanel extends JPanel {
public ChildPanel(int id, MouseListener ml, String name) {
setLayout(new BorderLayout());
add(new ControlPanel(id, ml, name), "First");
add(getContent(id));
}
private JPanel getContent(int id) {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(1, 1, 1, 1);
gbc.weightx = 0.5;
gbc.weighty = 0;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = 1;
gbc.anchor = gbc.PAGE_START;
gbc.fill = GridBagConstraints.HORIZONTAL;
if (id == 1) {
JButton hbutton = new JButton("Home");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_house.png")));
hbutton.setToolTipText("Click to go home");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
JButton hisbutton = new JButton("History");
hisbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_25011.png")));
hisbutton.setToolTipText("Browse previous pages");
hisbutton.setPreferredSize(new Dimension(150, 25));
hisbutton.setBackground(Color.decode("#B29A99"));
gbc.insets = new Insets(1, 1, 1, 1);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(hisbutton, gbc);
}
else if (id == 2) {
gbc.anchor = gbc.PAGE_START;
JButton zbutton = new JButton("Zoom");
zbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_rsz_2fontsize.png")));
zbutton.setToolTipText("Click to get better view");
zbutton.setPreferredSize(new Dimension(150, 15));
zbutton.setBackground(Color.decode("#B29A99"));
panel.add(zbutton, gbc);
JSlider slider = new JSlider();
slider.setBackground(Color.DARK_GRAY);
gbc.insets = new Insets(4, 4, 4, 4);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(slider,gbc);
}
else if (id==3)
{
JButton hbutton = new JButton("New Page");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_download_4.jpg")));
hbutton.setToolTipText("Start with new page");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
else {
JButton hbutton = new JButton("Copy");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_file_copy.png")));
hbutton.setToolTipText("Copy");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
panel.setBackground(Color.DARK_GRAY);
return panel;
}
public Dimension getPreferredSize() {
return new Dimension(150, 150);
}
}
class ControlPanel extends JPanel {
int id;
JLabel titleLabel;
Color c1 = new Color(51,3,0);
Color c2 = new Color(153, 129, 127);
Color fontFg = Color.BLACK;
Color rolloverFg = new Color(206, 157, 157);
public final static int HEIGHT = 40;
public ControlPanel(int id, MouseListener ml, String name) {
this.id = id;
//setLayout(new BorderLayout());
add(titleLabel = new JLabel(name));
titleLabel.setForeground(fontFg);
Dimension d = getPreferredSize();
d.height = HEIGHT;
setPreferredSize(d);
addMouseListener(ml);
addMouseListener(listener);
}
protected void paintComponent(Graphics g) {
int w = getWidth();
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(w / 2, 0, c1, w / 2, HEIGHT / 2, c2));
g2.fillRect(0, 0, w, HEIGHT);
}
private MouseListener listener = new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
titleLabel.setForeground(rolloverFg);
}
public void mouseExited(MouseEvent e) {
titleLabel.setForeground(fontFg);
}
};
}
但是当我 运行 我的浏览器时，应该隐藏在面板下的按钮显示在另一个面板的按钮上
此处 "History" 第一个面板 "Navigation" 在我单击第二个面板 "Settings" 时显示并隐藏第二个面板的 "Zoom" 按钮。我该怎么办？
您可以将 AccordianPanel 的 JComponent#isOptimizedDrawingEnabled() 方法覆盖为 return false:
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
//...
}
@Override public boolean isOptimizedDrawingEnabled() {
return false;
}
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import javax.swing.*;
public class AccordianTest2 {
JPanel getContent() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(new AccordianPanel().getPanel(), gbc);
panel.setBackground(Color.DARK_GRAY);
panel.setVisible(true);
return panel;
}
public static void main(String... args) {
EventQueue.invokeLater(() -> {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new AccordianTest2().getContent());
f.setSize(320, 480);
f.setLocationRelativeTo(null);
f.setVisible(true);
});
}
}
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
setLayout(null);
int childCount = 4;
Dimension d = new Dimension();
int h = 0;
String[] name = {"Navigation", "Settings", "New tab", "More Tools"};
for (int j = 0; j < childCount; j++) {
ChildPanel child = new ChildPanel(j + 1, ml, name[j]);
add(child);
d = child.getPreferredSize();
child.setBounds(0, h, d.width, d.height);
if (j < childCount - 1) {
h += ControlPanel.HEIGHT;
}
}
h += d.height;
setPreferredSize(new Dimension(d.width, h));
// Set z-order for children.
setZOrder();
}
@Override public boolean isOptimizedDrawingEnabled() {
return false;
}
private void setZOrder() {
Component[] c = getComponents();
for (int j = 0; j < c.length - 1; j++) {
setComponentZOrder(c[j], c.length - 1 - j);
}
}
private void setChildVisible(int indexToOpen) {
int[] indices = new int[0];
int travelLimit = 0;
if (visibleIndex < indexToOpen) {
travelLimit = ControlPanel.HEIGHT
- getComponent(visibleIndex).getHeight();
int n = indexToOpen - visibleIndex;
indices = new int[n];
for (int j = visibleIndex, k = 0; j < indexToOpen; j++, k++) {
indices[k] = j + 1;
}
} else if (visibleIndex > indexToOpen) {
travelLimit = getComponent(visibleIndex).getHeight()
- ControlPanel.HEIGHT;
int n = visibleIndex - indexToOpen;
indices = new int[n];
for (int j = indexToOpen, k = 0; j < visibleIndex; j++, k++) {
indices[k] = j + 1;
}
}
movePanels(indices, travelLimit);
visibleIndex = indexToOpen;
}
private void movePanels(final int[] indices, final int travel) {
movingComponents = true;
Thread thread = new Thread(new Runnable() {
public void run() {
Component[] c = getComponents();
int limit = travel > 0 ? travel : 0;
int dy = travel > 0 ? 1 : -1;
(new SwingWorker<Void, Integer>() {
@Override public Void doInBackground() {
int count = travel > 0 ? 0 : travel;
while (count < limit) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
System.out.println("interrupted");
break;
}
for (int j = 0; j < indices.length; j++) {
int index = c.length - 1 - indices[j];
Point p = c[index].getLocation();
p.y += dy;
c[index].setLocation(p.x, p.y);
}
publish(count++);
}
return null;
}
@Override protected void process(List<Integer> chunks) {
repaint();
}
@Override public void done() {
movingComponents = false;
}
}).execute();
// while (count < limit) {
// try {
// Thread.sleep(5);
// } catch (InterruptedException e) {
// System.out.println("interrupted");
// break;
// }
// for (int j = 0; j < indices.length; j++) {
// int index = c.length - 1 - indices[j];
// Point p = c[index].getLocation();
// p.y += dy;
// c[index].setLocation(p.x, p.y);
// }
// repaint();
// count++;
// }
// movingComponents = false;
}
});
thread.setPriority(Thread.NORM_PRIORITY);
thread.start();
}
private MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
int index = ((ControlPanel) e.getSource()).id - 1;
if (!movingComponents) {
setChildVisible(index);
}
}
};
public JPanel getPanel() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(this, gbc);
return panel;
}
}
class ChildPanel extends JPanel {
public ChildPanel(int id, MouseListener ml, String name) {
setLayout(new BorderLayout());
add(new ControlPanel(id, ml, name), "First");
add(getContent(id));
}
private JPanel getContent(int id) {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(1, 1, 1, 1);
gbc.weightx = 0.5;
gbc.weighty = 0;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = 1;
gbc.anchor = gbc.PAGE_START;
gbc.fill = GridBagConstraints.HORIZONTAL;
if (id == 1) {
JButton hbutton = new JButton("Home");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_house.png")));
hbutton.setToolTipText("Click to go home");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
JButton hisbutton = new JButton("History");
//hisbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_25011.png")));
hisbutton.setToolTipText("Browse previous pages");
hisbutton.setPreferredSize(new Dimension(150, 25));
hisbutton.setBackground(Color.decode("#B29A99"));
gbc.insets = new Insets(1, 1, 1, 1);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(hisbutton, gbc);
} else if (id == 2) {
gbc.anchor = gbc.PAGE_START;
JButton zbutton = new JButton("Zoom");
//zbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_rsz_2fontsize.png")));
zbutton.setToolTipText("Click to get better view");
zbutton.setPreferredSize(new Dimension(150, 15));
zbutton.setBackground(Color.decode("#B29A99"));
panel.add(zbutton, gbc);
JSlider slider = new JSlider();
slider.setBackground(Color.DARK_GRAY);
gbc.insets = new Insets(4, 4, 4, 4);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(slider, gbc);
} else if (id == 3) {
JButton hbutton = new JButton("New Page");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_download_4.jpg")));
hbutton.setToolTipText("Start with new page");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
} else {
JButton hbutton = new JButton("Copy");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_file_copy.png")));
hbutton.setToolTipText("Copy");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
panel.setBackground(Color.DARK_GRAY);
return panel;
}
public Dimension getPreferredSize() {
return new Dimension(150, 150);
}
}
class ControlPanel extends JPanel {
int id;
JLabel titleLabel;
Color c1 = new Color(51, 3, 0);
Color c2 = new Color(153, 129, 127);
Color fontFg = Color.BLACK;
Color rolloverFg = new Color(206, 157, 157);
public final static int HEIGHT = 40;
public ControlPanel(int id, MouseListener ml, String name) {
this.id = id;
//setLayout(new BorderLayout());
add(titleLabel = new JLabel(name));
titleLabel.setForeground(fontFg);
Dimension d = getPreferredSize();
d.height = HEIGHT;
setPreferredSize(d);
addMouseListener(ml);
addMouseListener(listener);
}
protected void paintComponent(Graphics g) {
int w = getWidth();
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(w / 2, 0, c1, w / 2, HEIGHT / 2, c2));
g2.fillRect(0, 0, w, HEIGHT);
}
private MouseListener listener = new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
titleLabel.setForeground(rolloverFg);
}
public void mouseExited(MouseEvent e) {
titleLabel.setForeground(fontFg);
}
};
}
我正在尝试在 java 秋千中制作手风琴面板 browser.I 在面板中添加了一些按钮。 这是我的代码（我从代码中删除了一些按钮以使其更小，如果您在理解我的代码时遇到任何问题请告诉我）
public class AccordianTest {
JPanel getContent() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(new AccordianPanel().getPanel(), gbc);
panel.setBackground(Color.DARK_GRAY);
panel.setVisible(true);
return panel;
}
}
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
setLayout(null);
int childCount = 4;
Dimension d = new Dimension();
int h = 0;
String[] name = {"Navigation", "Settings", "New tab", "More Tools"};
for (int j = 0; j < childCount; j++) {
ChildPanel child = new ChildPanel(j + 1, ml, name[j]);
add(child);
d = child.getPreferredSize();
child.setBounds(0, h, d.width, d.height);
if (j < childCount - 1) {
h += ControlPanel.HEIGHT;
}
}
h += d.height;
setPreferredSize(new Dimension(d.width, h));
// Set z-order for children.
setZOrder();
}
private void setZOrder() {
Component[] c = getComponents();
for (int j = 0; j < c.length - 1; j++) {
setComponentZOrder(c[j], c.length - 1 - j);
}
}
private void setChildVisible(int indexToOpen) {
int[] indices = new int[0];
int travelLimit = 0;
if (visibleIndex < indexToOpen) {
travelLimit = ControlPanel.HEIGHT
- getComponent(visibleIndex).getHeight();
int n = indexToOpen - visibleIndex;
indices = new int[n];
for (int j = visibleIndex, k = 0; j < indexToOpen; j++, k++) {
indices[k] = j + 1;
}
} else if (visibleIndex > indexToOpen) {
travelLimit = getComponent(visibleIndex).getHeight()
- ControlPanel.HEIGHT;
int n = visibleIndex - indexToOpen;
indices = new int[n];
for (int j = indexToOpen, k = 0; j < visibleIndex; j++, k++) {
indices[k] = j + 1;
}
}
movePanels(indices, travelLimit);
visibleIndex = indexToOpen;
}
private void movePanels(final int[] indices, final int travel) {
movingComponents = true;
Thread thread = new Thread(new Runnable() {
public void run() {
Component[] c = getComponents();
int limit = travel > 0 ? travel : 0;
int count = travel > 0 ? 0 : travel;
int dy = travel > 0 ? 1 : -1;
while (count < limit) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
System.out.println("interrupted");
break;
}
for (int j = 0; j < indices.length; j++) {
int index = c.length - 1 - indices[j];
Point p = c[index].getLocation();
p.y += dy;
c[index].setLocation(p.x, p.y);
}
repaint();
count++;
}
movingComponents = false;
}
});
thread.setPriority(Thread.NORM_PRIORITY);
thread.start();
}
private MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
int index = ((ControlPanel) e.getSource()).id - 1;
if (!movingComponents) {
setChildVisible(index);
}
}
};
public JPanel getPanel() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(this, gbc);
return panel;
}
}
class ChildPanel extends JPanel {
public ChildPanel(int id, MouseListener ml, String name) {
setLayout(new BorderLayout());
add(new ControlPanel(id, ml, name), "First");
add(getContent(id));
}
private JPanel getContent(int id) {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(1, 1, 1, 1);
gbc.weightx = 0.5;
gbc.weighty = 0;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = 1;
gbc.anchor = gbc.PAGE_START;
gbc.fill = GridBagConstraints.HORIZONTAL;
if (id == 1) {
JButton hbutton = new JButton("Home");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_house.png")));
hbutton.setToolTipText("Click to go home");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
JButton hisbutton = new JButton("History");
hisbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_25011.png")));
hisbutton.setToolTipText("Browse previous pages");
hisbutton.setPreferredSize(new Dimension(150, 25));
hisbutton.setBackground(Color.decode("#B29A99"));
gbc.insets = new Insets(1, 1, 1, 1);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(hisbutton, gbc);
}
else if (id == 2) {
gbc.anchor = gbc.PAGE_START;
JButton zbutton = new JButton("Zoom");
zbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_rsz_2fontsize.png")));
zbutton.setToolTipText("Click to get better view");
zbutton.setPreferredSize(new Dimension(150, 15));
zbutton.setBackground(Color.decode("#B29A99"));
panel.add(zbutton, gbc);
JSlider slider = new JSlider();
slider.setBackground(Color.DARK_GRAY);
gbc.insets = new Insets(4, 4, 4, 4);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(slider,gbc);
}
else if (id==3)
{
JButton hbutton = new JButton("New Page");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_download_4.jpg")));
hbutton.setToolTipText("Start with new page");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
else {
JButton hbutton = new JButton("Copy");
hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_file_copy.png")));
hbutton.setToolTipText("Copy");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
panel.setBackground(Color.DARK_GRAY);
return panel;
}
public Dimension getPreferredSize() {
return new Dimension(150, 150);
}
}
class ControlPanel extends JPanel {
int id;
JLabel titleLabel;
Color c1 = new Color(51,3,0);
Color c2 = new Color(153, 129, 127);
Color fontFg = Color.BLACK;
Color rolloverFg = new Color(206, 157, 157);
public final static int HEIGHT = 40;
public ControlPanel(int id, MouseListener ml, String name) {
this.id = id;
//setLayout(new BorderLayout());
add(titleLabel = new JLabel(name));
titleLabel.setForeground(fontFg);
Dimension d = getPreferredSize();
d.height = HEIGHT;
setPreferredSize(d);
addMouseListener(ml);
addMouseListener(listener);
}
protected void paintComponent(Graphics g) {
int w = getWidth();
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(w / 2, 0, c1, w / 2, HEIGHT / 2, c2));
g2.fillRect(0, 0, w, HEIGHT);
}
private MouseListener listener = new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
titleLabel.setForeground(rolloverFg);
}
public void mouseExited(MouseEvent e) {
titleLabel.setForeground(fontFg);
}
};
}
但是当我 运行 我的浏览器时，应该隐藏在面板下的按钮显示在另一个面板的按钮上
此处 "History" 第一个面板 "Navigation" 在我单击第二个面板 "Settings" 时显示并隐藏第二个面板的 "Zoom" 按钮。我该怎么办？
您可以将 AccordianPanel 的 JComponent#isOptimizedDrawingEnabled() 方法覆盖为 return false:
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
//...
}
@Override public boolean isOptimizedDrawingEnabled() {
return false;
}
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import javax.swing.*;
public class AccordianTest2 {
JPanel getContent() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(new AccordianPanel().getPanel(), gbc);
panel.setBackground(Color.DARK_GRAY);
panel.setVisible(true);
return panel;
}
public static void main(String... args) {
EventQueue.invokeLater(() -> {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new AccordianTest2().getContent());
f.setSize(320, 480);
f.setLocationRelativeTo(null);
f.setVisible(true);
});
}
}
class AccordianPanel extends JPanel {
boolean movingComponents = false;
int visibleIndex = 3;
public AccordianPanel() {
setLayout(null);
int childCount = 4;
Dimension d = new Dimension();
int h = 0;
String[] name = {"Navigation", "Settings", "New tab", "More Tools"};
for (int j = 0; j < childCount; j++) {
ChildPanel child = new ChildPanel(j + 1, ml, name[j]);
add(child);
d = child.getPreferredSize();
child.setBounds(0, h, d.width, d.height);
if (j < childCount - 1) {
h += ControlPanel.HEIGHT;
}
}
h += d.height;
setPreferredSize(new Dimension(d.width, h));
// Set z-order for children.
setZOrder();
}
@Override public boolean isOptimizedDrawingEnabled() {
return false;
}
private void setZOrder() {
Component[] c = getComponents();
for (int j = 0; j < c.length - 1; j++) {
setComponentZOrder(c[j], c.length - 1 - j);
}
}
private void setChildVisible(int indexToOpen) {
int[] indices = new int[0];
int travelLimit = 0;
if (visibleIndex < indexToOpen) {
travelLimit = ControlPanel.HEIGHT
- getComponent(visibleIndex).getHeight();
int n = indexToOpen - visibleIndex;
indices = new int[n];
for (int j = visibleIndex, k = 0; j < indexToOpen; j++, k++) {
indices[k] = j + 1;
}
} else if (visibleIndex > indexToOpen) {
travelLimit = getComponent(visibleIndex).getHeight()
- ControlPanel.HEIGHT;
int n = visibleIndex - indexToOpen;
indices = new int[n];
for (int j = indexToOpen, k = 0; j < visibleIndex; j++, k++) {
indices[k] = j + 1;
}
}
movePanels(indices, travelLimit);
visibleIndex = indexToOpen;
}
private void movePanels(final int[] indices, final int travel) {
movingComponents = true;
Thread thread = new Thread(new Runnable() {
public void run() {
Component[] c = getComponents();
int limit = travel > 0 ? travel : 0;
int dy = travel > 0 ? 1 : -1;
(new SwingWorker<Void, Integer>() {
@Override public Void doInBackground() {
int count = travel > 0 ? 0 : travel;
while (count < limit) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
System.out.println("interrupted");
break;
}
for (int j = 0; j < indices.length; j++) {
int index = c.length - 1 - indices[j];
Point p = c[index].getLocation();
p.y += dy;
c[index].setLocation(p.x, p.y);
}
publish(count++);
}
return null;
}
@Override protected void process(List<Integer> chunks) {
repaint();
}
@Override public void done() {
movingComponents = false;
}
}).execute();
// while (count < limit) {
// try {
// Thread.sleep(5);
// } catch (InterruptedException e) {
// System.out.println("interrupted");
// break;
// }
// for (int j = 0; j < indices.length; j++) {
// int index = c.length - 1 - indices[j];
// Point p = c[index].getLocation();
// p.y += dy;
// c[index].setLocation(p.x, p.y);
// }
// repaint();
// count++;
// }
// movingComponents = false;
}
});
thread.setPriority(Thread.NORM_PRIORITY);
thread.start();
}
private MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
int index = ((ControlPanel) e.getSource()).id - 1;
if (!movingComponents) {
setChildVisible(index);
}
}
};
public JPanel getPanel() {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
panel.add(this, gbc);
return panel;
}
}
class ChildPanel extends JPanel {
public ChildPanel(int id, MouseListener ml, String name) {
setLayout(new BorderLayout());
add(new ControlPanel(id, ml, name), "First");
add(getContent(id));
}
private JPanel getContent(int id) {
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(1, 1, 1, 1);
gbc.weightx = 0.5;
gbc.weighty = 0;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = 1;
gbc.anchor = gbc.PAGE_START;
gbc.fill = GridBagConstraints.HORIZONTAL;
if (id == 1) {
JButton hbutton = new JButton("Home");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_house.png")));
hbutton.setToolTipText("Click to go home");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
JButton hisbutton = new JButton("History");
//hisbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_1rsz_25011.png")));
hisbutton.setToolTipText("Browse previous pages");
hisbutton.setPreferredSize(new Dimension(150, 25));
hisbutton.setBackground(Color.decode("#B29A99"));
gbc.insets = new Insets(1, 1, 1, 1);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(hisbutton, gbc);
} else if (id == 2) {
gbc.anchor = gbc.PAGE_START;
JButton zbutton = new JButton("Zoom");
//zbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_rsz_2fontsize.png")));
zbutton.setToolTipText("Click to get better view");
zbutton.setPreferredSize(new Dimension(150, 15));
zbutton.setBackground(Color.decode("#B29A99"));
panel.add(zbutton, gbc);
JSlider slider = new JSlider();
slider.setBackground(Color.DARK_GRAY);
gbc.insets = new Insets(4, 4, 4, 4);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.0;
gbc.gridheight = 1;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(slider, gbc);
} else if (id == 3) {
JButton hbutton = new JButton("New Page");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_download_4.jpg")));
hbutton.setToolTipText("Start with new page");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
} else {
JButton hbutton = new JButton("Copy");
//hbutton.setIcon(new ImageIcon(Hello.class.getResource("/rsz_file_copy.png")));
hbutton.setToolTipText("Copy");
hbutton.setPreferredSize(new Dimension(150, 25));
hbutton.setBackground(Color.decode("#B29A99"));
panel.add(hbutton, gbc);
}
panel.setBackground(Color.DARK_GRAY);
return panel;
}
public Dimension getPreferredSize() {
return new Dimension(150, 150);
}
}
class ControlPanel extends JPanel {
int id;
JLabel titleLabel;
Color c1 = new Color(51, 3, 0);
Color c2 = new Color(153, 129, 127);
Color fontFg = Color.BLACK;
Color rolloverFg = new Color(206, 157, 157);
public final static int HEIGHT = 40;
public ControlPanel(int id, MouseListener ml, String name) {
this.id = id;
//setLayout(new BorderLayout());
add(titleLabel = new JLabel(name));
titleLabel.setForeground(fontFg);
Dimension d = getPreferredSize();
d.height = HEIGHT;
setPreferredSize(d);
addMouseListener(ml);
addMouseListener(listener);
}
protected void paintComponent(Graphics g) {
int w = getWidth();
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(w / 2, 0, c1, w / 2, HEIGHT / 2, c2));
g2.fillRect(0, 0, w, HEIGHT);
}
private MouseListener listener = new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
titleLabel.setForeground(rolloverFg);
}
public void mouseExited(MouseEvent e) {
titleLabel.setForeground(fontFg);
}
};
}