Placing JComboBox in JTable ColumnHeader

Question

Can any one help me on how to place a JComboBox in JTable ColumnHeader....?

Answer 1

try this:
package ComponentDisplayer;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
class JComponentCellRenderer implements TableCellRenderer
    public Component getTableCellRendererComponent(JTable table, Object value,
          boolean isSelected, boolean hasFocus, int row, int column) {
        return (JComponent)value;
}and
package ComponentDisplayer;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class Pable
     public static void main(String[] args)
          JFrame frame = new JFrame("Table");
          frame.addWindowListener( new WindowAdapter() {
               public void windowClosing(WindowEvent e)
                    Window win = e.getWindow();
                    win.setVisible(false);
                    win.dispose();
                    System.exit(0);
          JTable table = new JTable(3,2);
             TableCellRenderer renderer = new JComponentCellRenderer();
              TableColumnModel columnModel = table.getColumnModel();
              TableColumn column0 = columnModel.getColumn(0);
              TableColumn column1 = columnModel.getColumn(1);
              column0.setHeaderRenderer(renderer);
              JComboBox jb=new JComboBox();
              jb.insertItemAt("well", 0);
              jb.insertItemAt("done", 1);
              column0.setHeaderValue(jb);
              column1.setHeaderRenderer(renderer);
              column1.setHeaderValue(new JComboBox());
          table.setAutoResizeMode(table.AUTO_RESIZE_ALL_COLUMNS);
          table.setSize(900, 1200);
          JScrollPane sp = new JScrollPane(table);
          table.setColumnSelectionAllowed(false);
         table.setRowSelectionAllowed(true);
          frame.getContentPane().add( sp );
          frame.pack();
          frame.setVisible(true);
          //frame.show();
}as you can see adding it is not that hard but you cannot interact with them because if my memory serves well, tableheaders cannot have focus by default. So you gotta write your own implementation of header (may be using sth like: )public class MyTableHeaderRenderer extends JComponent implements
          TableCellRenderer {
     public MyTableHeaderRenderer() {
          // TODO Auto-generated constructor stub
     public Component getTableCellRendererComponent(JTable arg0, Object arg1,
               boolean arg2, boolean arg3, int arg4, int arg5) {
          // TODO Auto-generated method stub
          return (JComponent)arg1;
     }and then use this as default renderer in your implementation.)
E,ther you have to handle setfocus thing or keep track of mouse events
I hope this helps