The common behavior is that it will not drop and will (very quickly) snap back to origin.
On Jun 16, 2010, at 9:19 PM, Tony Romano wrote: > Hmm... I'm returning the NSDragOperationNone now, all I get is an image of > what is being dragged no other symbol and the outlineview won't accept the > drop which is correct. When I have a valid selection, I get the other symbol > for copy(green circle with plus sign), or for Move, the outlineview > highlights the drop point. > > -Tony > > On Jun 16, 2010, at 7:11 PM, Kyle Sluder wrote: > >> On Wed, Jun 16, 2010 at 6:55 PM, Tony Romano <tony...@hotmail.com> wrote: >>> Briefly, in a DnD operation all the nodes selected need to be siblings of >>> each other. During validateDrop I check for this and it calculates it just >>> fine. However, I need to set the DnD image to something indicating this is >>> not allowed, I thought using the International NO symbol made sense but it >>> is not defined as one of the NSDragOperation... flags. So I am thinking >>> either this is not HIG compliant or it is and I just need to supply my own. >>> I know I have seen other apps do it but it's doesn't been it's HIG >>> compliant. >> >> I believe that's a Carbon thing; there is also no standard "not >> allowed" cursor. Just return NSDragOperationNone and let the >> slide-back animation do its job. >> >> If you want to explain to the user why they can't drag, maybe you >> could use a tooltip? Query the draggingInfo in -draggingUpdated: and >> use it to position a borderless window that describes why the >> operation can't be done. >> >> --Kyle Sluder >> > > -Tony > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/jjoyce%40apple.com > > This email sent to jjo...@apple.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
