Detecting a double click outside the table

FROM : Damien Cooke
DATE : Tue Jul 01 23:48:26 2008

Hi all,
I have a window that has a custom NSTableView and an image cell. I 
have used this [tableView setDoubleAction: @selector(doubleAction:)]; 
to set the double action.  The issue is that I have a method in the 
tableview that the window controller can use to determine if a double 
click has occurred, I check this in the delegate  (BOOL)tableView:
(NSTableView *)aTableView shouldSelectRow:(NSInteger)rowIndex but it 
only works on the third click because it gets called every time I 
click.  There has to be a better way of detecting the double click in 
the tableview and telling my controller class this has happened.  Can 
someone point me in the right direction?

Regards
Damien