Hi Patrick, Currently, there is no API to accomplish this. Please feel free to file an enhancement request.
Kevin On 3 May 2010, at 05:33, Patrick Mau wrote: > Dear list members > > I have created in IB Plugin based on the Xcode template and everything works > fine. > If you need the completly boring source to help me out I can upload the full > project somewhere. > > Here's what I'd like to accomplish: > > I have a custom NSView subclass that is configured to be a container for > other objects. > Exposing child objects using "- (NSArray *)ibDefaultChildren" works as > expected. > > Now I want to be able to drag other Library Objects from my IBPlugin inside > the container but limiting > the objects to certain classes. > > How does IB determine the possible drop locations for dragged library objects? > > I have implemented: > > - (void)ibDidAddToDesignableDocument:(IBDocument *)document > { > NSObject *parent; > > parent = [document parentOfObject:self]; > > NSLog(@"ibDidAddToDesignableDocument: %@", document); > NSLog(@" parent: %@", parent); > > // Try to remove ourself when added to the wrong parent > if ([parent isKindOfClass:[self class]] == NO) { > [document removeObject:self]; > NSLog(@" removed"); > } > } > > I assumed (wrongly) that I might be able to check the parent object and > remove the > just-added instance, but that leads to a nice "assertion failure" in IB. > > Is there any way for a object to refuse itself to be dropped in certain > locations? > > Thanks a lot > Patrick > > _______________________________________________ > > 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/cathey%40apple.com > > This email sent to cat...@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