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
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