NSActionCell help

[Chad Hardin]

Ok, looking for some help here.

I have an NSMatrix full of DockTileCell's, which are subclassed from 
NSActionCell.  I'm doing everything progranatically, no GORM or 
anything.  I want to handle mouse clicks in my DockTileCell's.  I know 
and understand that I can use the NSCell startTrackingAt and variants to 
see where the mouse is moving, no problem there, I am getting those. 
However, how would I set it up so that I can detect double clicks in my 
cells?  I see that NSMatrix has the setDoubleAction, but I'm not really 
sure how to set it up, as I'm doing this stuff programatically.   Maybe 
I should reimplement trackMouse:inRect:ofView:untilMouseUp instead of 
NSMatrix's setDoubleAction? Can someone help me with this?  

Much apreciated!

Chad