我创建了一个带有行标题（左侧的标题）的JTable。它也可以调整大小。为了更新行标题的大小，我使用了list.firePropertyChange("cellRenderer", 0, 1);。我的问题是，当我使用此代码时，我的JTabbedPane仅在调整JFrame的大小时才会更新，但是如果我不使用此代码，因此JTabbedPane会自动更新，则行头将不再更新。我该如何解决？
代码示例：
public class Frame extends JFrame {
public static final String DIR = System.getProperty("user.dir");
private JTabbedPane menu;
private Panel menuSide0, menuSide1, menuSide2, menuSide3; //menu panels
private JPanel mainPanel; //main Panel where content is on
private JPanel menuPanel; //menu Panel where the Menu and selection is on
private JPanel selectionPanel; //The Panel where you will get the information about which parts u have selected
private JPanel optionPanel; //The Panel where you scroll and you can change between diffrent files
private ImageButton saveB, save_asB, openB;
public Frame() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
/*Frame Options*/
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
this.setMinimumSize(new Dimension(500, 400));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setBackground(Color.WHITE);
/*Menu*/
menuPanel = new JPanel();
this.add(menuPanel, BorderLayout.NORTH);
menuPanel.setLayout(new BorderLayout());
menuPanel.setPreferredSize(new Dimension(this.getWidth(), 200));
UIManager.put("TabbedPane.selected", Color.WHITE);
UIManager.put("TabbedPane.focus", Color.WHITE);
menu = new JTabbedPane(JTabbedPane.TOP);
menu.setSize(this.getWidth(), 100);
menu.setPreferredSize(new Dimension(this.getWidth(), 130));
menu.setBackground(Color.white);
menuPanel.add(menu, BorderLayout.NORTH);
/*Menusides*/
JPanel spaceTop = new JPanel();
spaceTop.setSize(Toolkit.getDefaultToolkit().getScreenSize().width, 20);
spaceTop.setBackground(new Color(255, 255, 255));
menuSide0 = new Panel(new BorderLayout());
menuSide0.add(spaceTop, BorderLayout.NORTH);
menuSide1 = new Panel();
menuSide2 = new Panel();
menu.add("menuside0", menuSide0);
menu.add("menuside1", menuSide1);
menu.add("menuside2", menuSide2);
//menuside0
JPanel panel0 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel0.setBackground(Color.WHITE);
panel0.add(new JButton("ARGH"));
panel0.add(new JButton("ARGH"));
panel0.add(new JButton("ARGH"));
menuSide0.add(panel0);
JTable table = new JTable(10, 10);
RowHeaderRenderer rhr = new RowHeaderRenderer(table);
JScrollPane scroll = new JScrollPane(table);
scroll.setRowHeaderView(buildRowHeader(table));
this.add(scroll);
this.add(menu, BorderLayout.NORTH);
this.setVisible(true);
}
private static final long serialVersionUID = 1L;
private JTable table;
public static final Dimension SCREEN_SIZE = Toolkit.getDefaultToolkit().getScreenSize();
public static final int MIN_ROW_HEIGHT = (int)SCREEN_SIZE.getHeight()/36;
public static final int MIN_ROW_WIDTH = (int)SCREEN_SIZE.getWidth()/108;
static class RowHeaderRenderer extends JLabel implements ListCellRenderer<Object> {
/**
*
*/
private static final long serialVersionUID = 1L;
private JTable table;
RowHeaderRenderer(JTable table) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {}
this.table = table;
JTableHeader header = this.table.getTableHeader();
setOpaque(true);
setBorder(new MatteBorder(1, 1, 0, 1, Color.LIGHT_GRAY));
setHorizontalAlignment(CENTER);
setForeground(null);
setBackground(Color.WHITE);
setFont(header.getFont());
setDoubleBuffered(true);
}
public Component getListCellRendererComponent(JList<?> list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
setText((value == null) ? "" : value.toString());
setPreferredSize(new Dimension((int) getPreferredSize().getWidth(), table.getRowHeight(index)));
list.firePropertyChange("cellRenderer", 0, 1);
return this;
}
}
private static JList<Object> buildRowHeader(JTable table) {
final Vector<String> headers = new Vector<String>();
for (int i = 0; i < table.getRowCount(); i++) {
String name = "";
if (i < 10) {
name += "0";
}
if (i < 100) {
name += "0";
}
name += i;
headers.add(name);
}
ListModel<Object> lm = new AbstractListModel<Object>() {
/**
*
*/
private static final long serialVersionUID = 1L;
public int getSize() {
return headers.size();
}
public Object getElementAt(int index) {
return headers.get(index);
}
};
final JList<Object> rowHeader = new JList<>(lm);
rowHeader.setOpaque(false);
rowHeader.setFixedCellWidth(MIN_ROW_HEIGHT);
MouseInputAdapter mouseAdapter = new MouseInputAdapter() {
Cursor oldCursor;
Cursor RESIZE_CURSOR = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
int index = -1;
int oldY = -1;
@Override
public void mouseMoved(MouseEvent e) {
super.mouseMoved(e);
int previ = getLocationToIndex(new Point(e.getX(), e.getY() - 3));
int nexti = getLocationToIndex(new Point(e.getX(), e.getY() + 3));
if (previ != -1 && previ != nexti) {
if (!isResizeCursor()) {
oldCursor = rowHeader.getCursor();
rowHeader.setCursor(RESIZE_CURSOR);
index = previ;
}
} else if (isResizeCursor()) {
rowHeader.setCursor(oldCursor);
}
}
private int getLocationToIndex(Point point) {
int i = rowHeader.locationToIndex(point);
if (!rowHeader.getCellBounds(i, i).contains(point)) {
i = -1;
}
return i;
}
@Override
public void mouseReleased(MouseEvent e) {
super.mouseReleased(e);
if (isResizeCursor()) {
rowHeader.setCursor(oldCursor);
index = -1;
oldY = -1;
}
}
@Override
public void mouseDragged(MouseEvent e) {
super.mouseDragged(e);
if (isResizeCursor() && index != -1) {
int y = e.getY();
if (oldY != -1) {
int inc = y - oldY;
int oldRowHeight = table.getRowHeight(index);
int oldNextRowHeight = table.getRowHeight(index+1);
if (oldRowHeight > MIN_ROW_HEIGHT || inc > 0) {
int rowHeight = Math.max(MIN_ROW_HEIGHT, oldRowHeight + inc);
table.setRowHeight(index, rowHeight);
if (rowHeader.getModel().getSize() > index + 1) {
int rowHeight1 = table.getRowHeight(index + 1) - inc;
rowHeight1 = Math.max(MIN_ROW_HEIGHT, rowHeight1);
table.setRowHeight(index + 1, rowHeight1);
}
}
if (table.getRowCount()>index+1)
table.setRowHeight(1+index, oldNextRowHeight);
}
oldY = y;
}
}
private boolean isResizeCursor() {
return rowHeader.getCursor() == RESIZE_CURSOR;
}
};
rowHeader.addMouseListener(mouseAdapter);
rowHeader.addMouseMotionListener(mouseAdapter);
rowHeader.addMouseWheelListener(mouseAdapter);
rowHeader.setCellRenderer(new RowHeaderRenderer(table));
rowHeader.setBackground(table.getBackground());
rowHeader.setForeground(table.getForeground());
return rowHeader;
}
public static void main(String[] args) {
Frame frame = new Frame();
}
}
编辑：
正如我发现的那样，当我直接将panel0添加到JTabbedPane而不是将其添加到menuSide0时，该Bug不会出现，但是我格式化得很好。我应该只使用其他布局还是以其他方式修复它？