Do we need: A folder cannot be dropped into itself

[Alex Fiestas]

On Monday, May 28, 2012 09:32:43 PM Peter Penz wrote:
> On 05/28/2012 08:44 PM, Alex Fiestas wrote:
> > Just that, do we really need to notify the user that a folder can't be
> > drop
> > into itself?
> > 
> > The only reason I could find is when you drag more than one folder/file
> > and
> > the action is not performed beacuse of that error. Maybe in that case we
> > could move everything into the folder besides the error?
> 
> Sorry, I but did not understand your suggestion: If the users drops
> folder A into A - what should be done here instead of showing the
> error-message?
Nothing, the folder will still be selected and nothing should happen.

>  > Maybe in that case we could
>  > move everything into the folder besides the error?
> 
> But folder A contains already everything - what should be moved?
If we have selected folder A and files B C, then we drop A,B,C into A files B 
and C should be moved into A.

Basically in my humble opinion dropping A into A is an obvious mistake and the 
user shouldn't be noticed of it.

I know 0 about usability and such, but I fail to see how the "A folder cannot 
be dropped into itself" can be helpful.