Jtable+JComboBox=?

Question

Hi!
I want to implement a component that should be:
It should look like a JComboBox but it's visible string must be divided into columns like a jtable row. When a user clicks right arrow (like in combobox), a scrollable JTable pops up (like combo box popup) and user now can pick another row. Is it possible to implement this? How?
Thanks.

Answer 1

See the demo pasted below. It displays a table in combobox popup. It has only a column but you can customize it using table model to have more then one row.
Now you should use a custom renderer to display currently selected item. You can use JTable for it.
import java.awt.*;
import javax.swing.*;
public class TablePopupComboFrame extends JFrame {
     JPanel jPanel1 = new JPanel();
     JComboBox combo = new JComboBox();
     String items [] = {"pratap","singh"};
     JComboBox jComboBox1 = new JComboBox(items);
     public TablePopupComboFrame() {
          try {
               jbInit();
          catch(Exception e) {
               e.printStackTrace();
          combo.addItem("one");
          combo.addItem("two");
          combo.addItem("three");
          combo.addItem("four");
          combo.addItem("1");
          combo.addItem("2");
          combo.addItem("3");
          combo.addItem("4");
          combo.addItem("5");
          combo.addItem("6");
          combo.addItem("7");
          combo.addItem("8");
          combo.setUI(new MyComboUI());
          combo.setBackground(Color.white);
     public static void main(String[] args) {
          TablePopupComboFrame f = new TablePopupComboFrame();
          f.pack();
          f.setLocation(300,300);
          f.show();
     private void jbInit() throws Exception {
          this.getContentPane().add(jPanel1, BorderLayout.CENTER);
          jPanel1.add(jComboBox1, null);
          jPanel1.add(combo, null);
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.basic.*;
import javax.swing.table.*;
public class TableComboPopup extends BasicComboPopup implements ListSelectionListener, ItemListener
     private JList list = new JList();
     private JComboBox combo;
     private MyComboUI ui;
     private PopupTableModel tm ;
     private final JTable table;
     private JScrollPane pane;
     public TableComboPopup(JComboBox combo, MyComboUI ui)
          super(combo);
          this.combo = combo;
          this.ui = ui;
          tm = new PopupTableModel();
          table = new JTable(tm);
          table.addMouseMotionListener(new MouseMotionAdapter() {
               public void mouseDragged(MouseEvent e) {
               public void mouseMoved(MouseEvent e) {
                    int row = table.rowAtPoint(e.getPoint());
                    if (row == -1)
                         return;
                    table.getSelectionModel().removeListSelectionListener(TableComboPopup.this);
                    table.getSelectionModel().setSelectionInterval(row,row);
                    table.getSelectionModel().addListSelectionListener(TableComboPopup.this);
          pane = new JScrollPane(table);
          table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          table.getSelectionModel().addListSelectionListener(this);
          combo.addItemListener(this);
     public void show()
          System.out.println("show called ");
          super.removeAll();
//          tm.fireTableStructureChanged();
          Dimension dim = new Dimension(combo.getPreferredSize().width,ui.getList().getPreferredScrollableViewportSize().height);
          pane.setPreferredSize(dim);
          pane.setBorder(ui.getList().getBorder());
          super.add(pane);
          table.getSelectionModel().removeListSelectionListener(this);
          selectRow();
          table.getSelectionModel().addListSelectionListener(this);
          super.show();
     private void selectRow()
          int index = combo.getSelectedIndex();
          System.out.println("selecting row in table: "+index);
          if (index == -1) return;
          table.setRowSelectionInterval(index,index);
     public void valueChanged(ListSelectionEvent e) {
          combo.setSelectedIndex(table.getSelectedRow());
     public void itemStateChanged(ItemEvent e) {
          if (e.getStateChange() == e.DESELECTED) return;
          table.getSelectionModel().removeListSelectionListener(this);
          selectRow();
          table.getSelectionModel().addListSelectionListener(this);
     private class PopupTableModel extends AbstractTableModel
          public int getColumnCount()
               return 1;
          public int getRowCount()
               return combo.getItemCount();
          public String getColumnName(int columnIndex)
               return "Items";
          public boolean isCellEditable(int row, int col)
               return false;
          public Object getValueAt(int r,int c)
               return combo.getItemAt(r);
import javax.swing.*;
import javax.swing.plaf.basic.*;
public class MyComboUI extends BasicComboBoxUI {
     protected ComboPopup createPopup() {
          return new TableComboPopup(comboBox, this);
     public JList getList()
          return listBox;
}