Re: NSOpenPanel validation?

FROM : m
DATE : Sun Oct 31 23:46:26 2004

For the archives:

I managed to get the behavior I was after by subclassing NSOpenPanel
and overriding the ok: method to do the validation and alert posting.
Not as clean a solution as I''d have liked, but it works well.

_murat

On Oct 31, 2004, at 1:06 PM, m wrote:

> I must be missing something basic here; I can't find a delegate method
> that allows me to validate the selection in an NSOpenPanel.
>
> I'm running NSOpenPanel as a sheet to import some files. Folders may
> also be selected and the contents imported.
>
> If the user selects "too many" files (for example, the user
> accidentally selects the root directory), I'd like to pop up an alert
> *before dismissing the open panel* informing them that importing that
> many files could take a long time. This would be similar to the
> "Replace?" alert one gets when saving a file to a name that already
> exists.
>
> So the user scenario is this
>
> 1) open import sheet (an NSOpenPanel)
> 2) make "too many" selections
> 3) click "Open" button
> 4) a modal alert pops up to warn that "too many" files are selected
> 5) dismiss alert
> 6) adjust selection in import sheet so that not "too many" files are
> selected
> 7) click "Open" button
> 8) import sheet dismisses
>
> Any help or pointers appreciated.
>
> _murat