Dragging Issues With IKImageBrowserView

FROM : Colin Cornaby
DATE : Sun Nov 18 09:10:27 2007

I have two sets of images browser items, and depending on user input, 
I feed one of the sets into a IKBrowserView. The items themselves are 
all NSManagedObjects in a store, and they implement IKImageBrowserItem.

The issue is one of the sets is all URL represented objects, and the 
other is all data represented objects. The URL represented objects 
behave like they should, I can drag them out of the view and into 
another view which is setup to accept file or TIFF pasteboard drops. 
However, with the second set of data represented items, I can't drag 
them at all. I can't even drag them for reordering.

The best explanation I can come up with as to why this is happening is 
that NSPasteboard doesn't have a type for image data, just image data 
of a certain type (I've tried representing my image browser data items 
as NSImage items and that also does not work). The workaround would 
seem to be that I would have to save my images as files on the hard 
drive, add records to my CoreData store for ordering and other 
metadata, and have those records point to the images on the drive. 
That way I can represent my images as URLs.

Has anyone else run into this issue? Perhaps someone has some insight 
into using memory backed images as dragging sources in an 
IKImageBrowserView?

Thanks,
Colin