Tablerow focus lost problem

Question

Hello to all
     First of all, I have to excuse for my english - I know, it is horrible. In looking for someone, who can give me some advices/solutions for fellowing problem with/in Swing.
I have to determine if row in JTable looses focus. If that's the case, focus must return to specific column. When focust is transfered within table (from one row to another)
that no problem, but if the user clicks for example button somewhere on panel outside table, focus must be trasferred back to table and to row that has been left.
To make the task more difficult the action started when the user click the button has to be canceled also. For the first part of the problem I've try to do fellowing:
//widget - my JTable
widget.addFocusListener(new FocusAdapter() {
       @Override
    public void focusLost(FocusEvent e) {         
         final int selectedRow = widget.getColumnModel().getSelectionModel().getAnchorSelectionIndex();
         //determining currently selected row, checking if its not empty and if focus wasn't transferred to any of
         //cell editors
       if (selectedRow != -1 && checkRowEmptyness.isRowEmpty(selectedRow) && !widget.isEditing()) {
        widget.requestFocusInWindow();
        widget.changeSelection(selectedRow, checkRowEmptyness.colNumber(), false, false);
  }); For the cancel event part of described problem - I have simply no idea how to do that. Can someone help my with that or at least point my to the right direction?
Thanks.

Answer 1

If you have a requirement that all the columns in a single row must have valid values then why not create a popup dialog to edit/change all the values at once. That way you can control when the dialog is closed. "Cancel" would ignore the changes and "Ok" would validate that all fields have a valid value before you close the dialog and update the model.