On Nov 9, 2010, at 9:13 PM, Quincey Morris wrote:
> On Nov 9, 2010, at 07:00, Sachin Porwal wrote:
>
>> In my application I need to choose only dmg files, so I am using
>> NSOpenPanel with the following code snippet.
>> But the NSOpenPanel is also allowing me to choose the folders having
>> the extension '.dmg'.
>>
>> Ideally NSOpenPanel should allow me to choose only dmg files not
>> folders ? Is this behavior as designed ?
>
> Presumably, since this is mature API, it's behaving as designed. You can get
> the behavior you want by using a panel delegate to disable choosing
> directories.
Some apps do this to allow you to choose folders as though they are types. For
example, Xcode lets you add a .framework, and the .framework folders are
treated as selectable files. That's why this works this way.
UTIs may be a good work around, as Quincey said.
corbin
>
> However, a better choice might be specify your desired files by UTI rather
> than extension. ('kUTTypeDiskImage' is the UTI for disk images.) You simply
> pass the UTI in place of the extension. That should work without a panel
> delegate.
>
> Note also that 'runModalForDirectory:...' is deprecated in 10.6. The correct
> way is to use 'setAllowedFileTypes:' and 'runModal:'.
>
>
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