JComboBoxes in JTable

[Nicholas Rogers]

Hello,
I have a JTable with 5 columns: Cols 2-5 are dynamic comboboxes, each dependent on the
previously selected item. The code below works beautifully when there is only one row, but when
I add another row, all comboboxes empty when the user tries to select a value. Can someone please help me figure this out?
My code:

public class PumpTracker {
private Vector companies = new Vector( 1, 1 ); // the Company object (which will be stored
//in the vector) contains a vector of leases, which contains a
//vector of wells, which contains a vector of pumps, which contains a
//vector of parts. I use the vectors of each object to fill
//the comboboxes.
private DefaultTableModel tableModel;
private JTable table;
private JComboBox leaseComboBox;
private int selectedLease = 0;
private JComboBox wellComboBox;
private int selectedWell = 0;
private JComboBox pumpComboBox;
private int selectedPump = 0;
private JComboBox partComboBox;
private int selectedPart = 0;
public PumpTracker() {
tableModel = new DefaultTableModel() {

public boolean isCellEditable(int row, int column) {

if ( column > 0 ) {

return true;

}

else {

return false;

}
}

};
tableModel.addColumn( "Company" );
tableModel.addColumn( "Lease" );
tableModel.addColumn( "Well" );
tableModel.addColumn( "Pump" );
tableModel.addColumn( "Part" );
table = new JTable( tableModel );
TableColumnModel columnModel = table.getColumnModel();
table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
table.getTableHeader().setReorderingAllowed( false );
table.setSelectionMode( ListSelectionModel.SINGLE_SELECTION );
leaseComboBox = new JComboBox();
DefaultCellEditor leaseCellEditor = new DefaultCellEditor( leaseComboBox ) {

public Component getTableCellEditorComponent( JTable table, Object value,
boolean isSelected, int rowIndex, int vColIndex ) {

try {

Company thisCompany = ( Company ) companies.get(rowIndex);
Vector leaseVector = ( Vector ) thisCompany.getLeases();
leaseComboBox = new JComboBox( leaseVector );

}

catch (Exception e) {

leaseComboBox = new JComboBox();

}

return leaseComboBox;

}

public Object getCellEditorValue() {

selectedLease = leaseComboBox.getSelectedIndex();
return leaseComboBox.getSelectedItem();

}

};
DefaultTableCellRenderer leaseCellRenderer = new DefaultTableCellRenderer() {

public Component getTableCellRendererComponent( JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column ) {

Company thisCompany = new Company();

try {

System.out.println("selected row is: " + row);
thisCompany = ( Company ) companies.get(row);
Vector leaseVector = ( Vector ) thisCompany.getLeases();
leaseComboBox = new JComboBox( leaseVector );
leaseComboBox.setSelectedIndex( selectedLease );

}

catch (Exception e) {

leaseComboBox = new JComboBox();

}

return leaseComboBox;

}

};
wellComboBox = new JComboBox();
DefaultCellEditor wellCellEditor = new DefaultCellEditor( wellComboBox ) {

public Component getTableCellEditorComponent( JTable table, Object value,
boolean isSelected, int rowIndex, int vColIndex ) {

try {

Company thisCompany = ( Company ) companies.get(rowIndex);
Vector leaseVector = ( Vector ) thisCompany.getLeases();
Lease thisLease = ( Lease ) leaseVector.get( selectedLease );
Vector wellVector = ( Vector ) thisLease.getWells();
wellComboBox = new JComboBox( wellVector );

}

catch (Exception e) {
/*
System.out.println( "Error from wellCellEditor: ");
e.printStackTrace();
System.out.println();
*/
wellComboBox = new JComboBox();

}

return wellComboBox;

}

public Object getCellEditorValue() {

selectedWell = wellComboBox.getSelectedIndex();
return wellComboBox.getSelectedItem();

}

};
DefaultTableCellRenderer wellCellRenderer = new DefaultTableCellRenderer() {

public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {

try {

Company thisCompany = (Company) companies.get(row);
Vector leaseVector = (Vector) thisCompany.getLeases();
Lease thisLease = (Lease) leaseVector.get( selectedLease );
Vector wellVector = (Vector) thisLease.getWells();
wellComboBox = new JComboBox( wellVector );
wellComboBox.setSelectedIndex( selectedWell );

}

catch (Exception e) {
/*
System.out.println( "Error from wellCellRenderer: ");
e.printStackTrace();
System.out.println();
*/
wellComboBox = new JComboBox();

}
/*
try {

pumpComboBox.setSelectedIndex( 0 );
partComboBox.setSelectedIndex( 0 );

}

catch (Exception e) {}
*/
return wellComboBox;

}

};
columnModel.getColumn( 1 ).setCellEditor( leaseCellEditor );
columnModel.getColumn( 1 ).setCellRenderer( leaseCellRenderer );
columnModel.getColumn( 2 ).setCellEditor( wellCellEditor );
columnModel.getColumn( 2 ).setCellRenderer( wellCellRenderer );
columnModel.getColumn( 3 ).setCellEditor( pumpCellEditor );
columnModel.getColumn( 3 ).setCellRenderer( pumpCellRenderer );
columnModel.getColumn( 4 ).setCellEditor( partCellEditor );
columnModel.getColumn( 4 ).setCellRenderer( partCellRenderer );
JFrame pumpTracker = new JFrame( "Pump Tracker" );
pumpTracker.setIconImage( Toolkit.getDefaultToolkit().getImage("./icon.gif") );
pumpTracker.setJMenuBar(menuBar);
pumpTracker.getContentPane().add( new JScrollPane( table ), "Center" );
pumpTracker.getContentPane().add( buttonPanel, "South" );
pumpTracker.addWindowListener(new WindowAdapter() {

public void windowClosing( WindowEvent evt ) {

System.exit(0);

}

});
pumpTracker.pack();
pumpTracker.show();
}
}

[ February 21, 2003: Message edited by: Nicholas Rogers ]
[ February 21, 2003: Message edited by: Nicholas Rogers ]
[ February 21, 2003: Message edited by: Nicholas Rogers ]
[ February 21, 2003: Message edited by: Nicholas Rogers ]
[ February 21, 2003: Message edited by: Nicholas Rogers ]
[ February 21, 2003: Message edited by: Nicholas Rogers ]

[Nicholas Rogers]

I've limited this to the combobox renderer. If I comment out the lines that set the renderer to the column, adding new rows works, but I'd like the renderer to be a combobox instead of the standard textfield. Any help?