Как предотвратить появление кнопки?

Question

Я пытаюсь сделать панель аккордеона в моем браузере java swing. Я добавил несколько кнопок в панели. Вот мой код (я удалил некоторые кнопки из кода, чтобы сделать его меньше, если вы сталкиваетесь с любой проблемой понимания моего кода, пожалуйста, дайте мне знать)

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); 
    } 
}; 
} 

Но когда я бегу мой браузер на кнопку, которая должна остаются скрытыми под панели отображается на кнопке другой панели

здесь «История» первой панели «Навигация» показывает, когда я нажимаю на второй панели «Настройки» и скрывает «Масштаб» кнопки второй панели. Что мне делать ?

Answer 1

Вы могли бы переопределить JComponent#isOptimizedDrawingEnabled() метод AccordianPanel вернуть ложь:

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); 
    } 
    }; 
}