如何在JTable的行标题中添加复选框？ 以下代码创建一个包含列标题和行标题的表，并在每个列标题上有复选框和标题。我怎样才能在行标题标题中添加一个复选框???
package gui;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;
import javax.swing.plaf.metal.MetalBorders;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Vector;
public class JTableHeaderCheckBox
{
private static final int MIN_ROW_HEIGHT = 12;
Object colNames[] = {"" , "", ""};
Object[][] data = {};
DefaultTableModel dtm;
JTable table;
public JScrollPane buildGUI()
{
dtm = new DefaultTableModel(data,colNames);
table = new JTable(dtm);
for(int x = 0; x < 5; x++)
{
dtm.addRow(new Object[]{new Boolean(false), new Boolean(false), new Boolean(false)});
}
JScrollPane sp = new JScrollPane(table);
sp.setRowHeaderView(buildRowHeader(table));
for(int columnNumber = 0; columnNumber < table.getColumnCount(); columnNumber++){
TableColumn tc = table.getColumnModel().getColumn(columnNumber);
tc.setCellEditor(table.getDefaultEditor(Boolean.class));
tc.setCellRenderer(table.getDefaultRenderer(Boolean.class));
tc.setHeaderRenderer(new CheckBoxHeader(new MyItemListener(), String.valueOf(columnNumber)));
}
/*
for(int columnNumber = 0; columnNumber < table.getColumnCount(); columnNumber++){
TableColumn tc = table.getRo().getColumn(columnNumber);
tc.setCellEditor(table.getDefaultEditor(Boolean.class));
tc.setCellRenderer(table.getDefaultRenderer(Boolean.class));
tc.setHeaderRenderer(new CheckBoxHeader(new MyItemListener(), String.valueOf(columnNumber)));
}*/
JFrame f = new JFrame();
f.getContentPane().add(sp);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
return sp;
}
private static JList buildRowHeader(final JTable table) {
final Vector<String> headers = new Vector<String>();
for (int i = 0; i < table.getRowCount(); i++) {
headers.add(String.valueOf((char) (i + 65)).toUpperCase());
}
ListModel lm = new AbstractListModel() {
public int getSize() {
return headers.size();
}
public Object getElementAt(int index) {
return headers.get(index);
}
};
final JList rowHeader = new JList(lm);
rowHeader.setOpaque(false);
rowHeader.setFixedCellWidth(50);
MouseInputAdapter mouseAdapter = new MouseInputAdapter() {
Cursor oldCursor;
Cursor RESIZE_CURSOR = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
int index = -1;
int oldY = -1;
@Override
public void mousePressed(MouseEvent e) {
super.mousePressed(e);
}
@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);
if (oldRowHeight > 12 || 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(12, rowHeight1);
table.setRowHeight(index + 1, rowHeight1);
}
}
}
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;
}
static class RowHeaderRenderer extends JLabel implements ListCellRenderer {
private JTable table;
RowHeaderRenderer(JTable table) {
this.table = table;
JTableHeader header = this.table.getTableHeader();
setOpaque(true);
setBorder(new javax.swing.plaf.metal.MetalBorders.TableHeaderBorder());
setHorizontalAlignment(CENTER);
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
setDoubleBuffered(true);
}
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
setText((value == null) ? "" : value.toString());
setPreferredSize(null);
setPreferredSize(new Dimension((int) getPreferredSize().getWidth(), table.getRowHeight(index)));
//trick to force repaint on JList (set updateLayoutStateNeeded = true) on BasicListUI
list.firePropertyChange("cellRenderer", 0, 1);
return this;
}
}
class MyItemListener implements ItemListener
{
public void itemStateChanged(ItemEvent e) {
Object source = e.getSource();
if (source instanceof AbstractButton == false) return;
boolean checked = e.getStateChange() == ItemEvent.SELECTED;
for(int x = 0, y = table.getRowCount(); x < y; x++)
{
table.setValueAt(new Boolean(checked),x, ((CheckBoxHeader) source).column );
}
}
}
public static void main (String[] args)
{
try {
UIManager.setLookAndFeel("com.seaglasslookandfeel.SeaGlassLookAndFeel");
} catch (Exception e) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (InstantiationException e1) {
e1.printStackTrace();
} catch (IllegalAccessException e1) {
e1.printStackTrace();
} catch (UnsupportedLookAndFeelException e1) {
e1.printStackTrace();
}
}
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new JTableHeaderCheckBox().buildGUI();
}
});
}
}
class CheckBoxHeader extends JCheckBox
implements TableCellRenderer, MouseListener {
protected CheckBoxHeader rendererComponent;
protected int column;
protected boolean mousePressed = false;
protected String text;
public CheckBoxHeader(ItemListener itemListener, String text) {
this.text = text;
rendererComponent = this;
rendererComponent.addItemListener(itemListener);
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (table != null) {
JTableHeader header = table.getTableHeader();
if (header != null) {
rendererComponent.setFont(header.getFont());
rendererComponent.setOpaque(true);
rendererComponent.setHorizontalAlignment(CENTER);
rendererComponent.setForeground(header.getForeground());
rendererComponent.setBackground(header.getBackground());
header.addMouseListener(rendererComponent);
}
}
setColumn(column);
rendererComponent.setText(text);
MetalBorders m = new MetalBorders();
setBorder(new javax.swing.plaf.metal.MetalBorders.TableHeaderBorder());
rendererComponent.setBorderPainted(true);
return rendererComponent;
}
protected void setColumn(int column) {
this.column = column;
}
public int getColumn() {
return column;
}
protected void handleClickEvent(MouseEvent e) {
if (mousePressed) {
mousePressed=false;
JTableHeader header = (JTableHeader)(e.getSource());
JTable tableView = header.getTable();
TableColumnModel columnModel = tableView.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = tableView.convertColumnIndexToModel(viewColumn);
if (viewColumn == this.column && e.getClickCount() == 1 && column != -1) {
doClick();
}
}
}
public void mouseClicked(MouseEvent e) {
handleClickEvent(e);
((JTableHeader)e.getSource()).repaint();
}
public void mousePressed(MouseEvent e) {
mousePressed = true;
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
}