contrib:table Column Click

[Shalini Seth]

Hi,
 
I am new to tapestry. I am working on the table component.
 
The problem I am facing is, I need to be able to figure out which column
the user has clicked on on the table, before the sorting happens.
 
I want to be able to do my own processing based on what the user has
selected.
 
I know this can be done by using service parameters. But thats not the
way I want to go as it would not be ideal design.
 
Thanks
Shalini