Selecting cells in a JTable

Hi All,
I'm looking for a way of selecting all cells from the original drag point to the current cell that the mouse is over.
This is for a year planner which displays the months vertcally and the days horizontally. So if the user was to start selecting cells in one month and move the mouse down a row onto the next month, I would want all cells selected from the first cell to the current cell.
Has anyone got any ideas?

Hi Pchatwin,
Any dukes available for bad news? :)
Thanks Stas but wouldn't that select entire rows
rather than cells?
For example, if I have a grid:
12345
67890
and drag from cell 3 to cell 9 I would need to see
cells 3, 4, 5, 6, 7, 8, 9 highlightedUnfortunately this is impossible with JTable's default selection model. By default, JTable models selections simply as an intersection of selected rows and columns. It doesn't track individual cells.
Turning to your example:
If you select cells 2,3,4,5 JTable tracks the following.
Note: The numbers I am using are row/col indexes, not your cell values.
Selected rows = {0}
Selected cols = {1,2,3,4}
This means the following cells are selected:
{{0,1},{0,2},{0,3},{0,4}} or {2,3,4,5}
Now if you want to add cells 6, 7, 8, 9 it won't work. The selection model tracks whether a column is selected or not. It can't be selected for one row and not for another. So it's impossible to have cell 6 selected and not 1. It would mean that column 0 would need to be both selected (to include 6) and not (to include 1). Does this make sense?
Sorry to have to tell you that. On the other hand it may save you some frustration.
Oh, and whether or not one can provide a custom model that allows this, I don't know - I've not tried it myself. It could be, but might be very difficult. For example, what would you return from JTable.getSelectedRows()?
Thanks!
Shannon Hickey (Swing Team)
>
Paul

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    col2= JComboBox cell editor
    col3= JComboBox cell editor, values dependent on col2
    col4= JComboBox cell editor, values dependent on col3
    col5= JComboBox cell editor, values dependent on col4
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    col2= lease object, containing vector of values for col3
    col3= well object, containing vector of values for col4
    col4= pump object, containing vector of values for col5
    col5= simply displayed.
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    column. Even the part column works correctly. Code snips:
    public class MyApplication ... {
      private TableColumn leaseColumn;
      private TableColumn wellColumn;
      private TableColumn pumpColumn;
      private TableColumn partColumn;
      private LeaseDropDown leaseDropDown;
      private WellDropDown wellDropDown;
      private PumpDropDown pumpDropDown;
      private PartDropDown partDropDown;
      private int currentLease = 0;
      private int currentWell = 0;
      private int currentPump = 0;
      public MyApplication() {
        leaseColumn = pumpshopTable.getColumnModel().getColumn(1);
        leaseDropDown = new LeaseDropDown(companies);
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        DefaultTableCellRenderer leaseRenderer =
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        leaseRenderer.setToolTipText("Click for leases");
        leaseColumn.setCellRenderer(leaseRenderer);
        //... same for lease, well, pump, part ...
        leaseDropDown.addCellEditorListener(new CellEditorListener() {
          public void editingCanceled(ChangeEvent e) {
          } // end editingCanceled method
          public void editingStopped(ChangeEvent e) {
            updateCells();
          } // end editingStopped method
        }); // end addCellEditorListener inner class
        //.... same inner class for well, pump, part ...
      } // end MyApplication constructor
      public void updateCells() {
        currentLease = leaseDropDown.getSelectedLease();
        //... get current well, pump, part ...
        leaseDropDown = new LeaseDropDown(companies); // companies=Vector,col1
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        //... same for lease, well, pump and part columns ...
      } // end updateCells method
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        implements TableCellEditor {
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      private JComboBox leaseList;
      public LeaseDropDown(Vector cVector) {
        companiesVector = cVector;     
      } // end LeaseDropDown constructor
      public Component getTableCellEditorComponent(JTable table,
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        leaseList = new JComboBox(leasesVector);
        return leaseList;
      } // end getTableCellEditorComponent method
      public Object getCellEditorValue() {
        return leaseList.getSelectedItem();
      } // end getCellEditorValue method
      public int getSelectedLease() {
        JOptionPane.showInputDialog("Selected lease is: " +
          leaseList.getSelectedIndex());
        return leaseList.getSelectedIndex();          
      } // end getSelectedLease method
    } // end LeaseDropDown class... LeaseDropDown can be extrapolated to well, pump, and part,
    handing well the selected lease, handing pump the selected
    lease and well, handing part the selected lease, well and pump.
    I guess my question is how do I get the selected comboboxitem (I'd
    settle for the entire combobox if there's no other way) to fill in the
    next column? Why does the way I have it now work for the first 2 combobox
    columns and not the third?

    I'll try to provide more details.
    I use a JComboBox implementation as a cell in a JTable. The CombBox is editable . This is what I get when I try to type in something.
    java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
    at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:1507)
    at java.awt.Component.getLocationOnScreen(Component.java:1481)
    at javax.swing.JPopupMenu.show(JPopupMenu.java:921)
    at javax.swing.plaf.basic.BasicComboPopup.show(BasicComboPopup.java:177)
    at javax.swing.plaf.basic.BasicComboBoxUI.setPopupVisible(BasicComboBoxUI.java:927)
    at javax.swing.JComboBox.setPopupVisible(JComboBox.java:790)
    at javax.swing.JComboBox.showPopup(JComboBox.java:775)
    I read some related bugs on the sun site but I am not sure if this is a bug and if it is then has it been fixed or work-around provided.
    any insights ??

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              public void removeCellEditorListener(CellEditorListener l)
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