Re: NSPopUpButton bug

[Marc Brünink]

> A little more than "you are in trouble" might be helpful.   What 
> actually happens when you do this?
It's hard to explain. Just give it a try. "Trouble" refers to the fact, 
that you are not able to select the first entry in the list anymore.
If I go to the top of the list the popup trys to select the item just 
above the last visible one. So it scrolls the unvisible item down so 
its visible. BUT: As soon as this is done the popup recognises that its 
last entry is not visible anymore (it was just put out of screen, 
because we scrolled up). And now it tries to undo the scroll and make 
the last entry visible again. Thereafter it recognises that the 
selected items is not visible anymore and just starts to scroll up. So 
we've a loop which results in some evil up and down scrolling. Just 
give it a try and you will understand.

> As a side note, I would also say that, if you have a popup button like 
> that, you may want to consider using something else to display the 
> list of choices to the user. :)
Actually the items are coming out of a database. So we do not have a 
clue about the count of them. Therefore its hard to tell which GUI 
element would be the best. Actually its impossible. I guess I could 
start optimise the GUI for the worst case scenario, but I guess then it 
wouldn't fit on the screen anymore :-) Normally we would use Combo 
Boxes with an autocomplete feature. However nobody thought there would 
be that many items.

Thanks
Marc