I have a JTable with a column that is rendered using a JTextPane-based  
cell-renderer.

On a single click on that column in the JTable, I would like to
determine the text offset of the click in the row under the user click.

I thought the code below would work, but the viewToModel() method fails
since the renderer is not actually visible -- internal to the
viewToModel() method, the rectangle that contains the rootView is null,
which causes the method to return -1.

Can't see a workable way of forcing a visible renderer on a mouse click.  
Am I missing something or is there an alternate/better way of doing
this?

Thanks,
Gerald

public void mouseReleased(MouseEvent e) {
   Point ept = e.getPoint();
   int row = table.rowAtPoint(ept);
   int col = table.columnAtPoint(ept);

   Rectangle r = table.getCellRect(row, col, false);
   Point local_offset = new Point(ept.x - r.x, ept.y - r.y);
   JTextPaneRenderer jtpr = (JTextPaneRenderer) table.getCellRenderer
(row, col);

   int mouseClickOffset = jtpr.viewToModel(local_offset);
}