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12/01/2002 at 03:06PM PST, ID: 20412283
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7.8

JTable with combobox that requeries on row change

Asked by mphel in Java Programming Language

Tags: combobox

I have a JTable with two comboboxes - one for a product category (the dropdown list stays the same for all rows) and one for the products that belong to that category (the dropdown list needs to change based on the category of the current row).  I have come close to implementing exactly what I need using a ListSelectionListener, but I can't quite seem to work out one issue I'm having.  As I'm moving from row to row, the combobox for the products does requery based on the category for that row  - except if I change the row by clicking on the actual products combobox field or the dropdown arrow for the products combobox for the row I'm moving to.  In that case, the products combobox reflects the list for the row I just left.  

This is the code that sets my listselectionlistener in the TableProducts class that extends JTable

ListSelectionModel lsm = new DefaultListSelectionModel();
lsm.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
this.setSelectionModel(lsm);
this.selectionModel.addListSelectionListener(new ListSelectionListener()
{
  public void valueChanged(ListSelectionEvent e)
  {        

    ListSelectionModel lsm;
    Integer m_currow;

    lsm = (ListSelectionModel)e.getSource();
    m_currow = new Integer(lsm.getMinSelectionIndex());
    set_products_combo(m_currow);
               
    }
});  


This is the method that sets the data in the products combobox

public void set_products_combo(Integer table_row)
{
   TableCellEditor editor;
   TableColumn tablecolumn;
   Long categorynumber;
       
   categorynumber = new Long(this.getModel().getValueAt(table_row.intValue(), 7).toString());
   editor = new DefaultCellEditor(new ProductsComboEditor(categorynumber));
   tablecolumn = this.getColumn("product");
   tablecolumn.setCellEditor(editor);
       
}
     

Again, this works in every case except when I change rows by clicking on the column with the Products combo box.  Does anyone know a solution for my problem?  Thanks.
[+][-]12/01/02 03:16 PM, ID: 7517926

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About this solution

Zone: Java Programming Language
Tags: combobox
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Solution Provided By: objects
Participating Experts: 2
Solution Grade: A
 
 
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