Drag-to-poof and tables

FROM : Tomas Franzén
DATE : Mon Jun 02 23:09:26 2008

Hi,

I'm trying to figure out the best way to implement a scenario where 
there's a table where the user can drag rows to reorder (the easy 
part) but also drop them outside of the table to remove items with a 
poof. The way we do it now is to use slideBack:NO and implement 
draggedImage:endedAt:operation: and checking for NSDragOperationNone 
and determining if the cursor was outside of the table view. And if 
so, do the poof. This sorta-kinda works, but has some downsides. The 
drag image never slides back. This is fine when there's a poof, but 
not when the drag was ended with NSDragOperationNone inside of the 
table. Also, this poofs if the user presses the escape key, since that 
also sends NSDragOperationNone, which is horrible.

This way just feels like a dirty hack. There must be a better way. How 
have you implemented it in your own apps?

Thanks!

Tomas Franzén
Lighthead Software
http://www.lightheadsw.com/