NSTreeController Question
NSTreeController Question
- Subject: NSTreeController Question
- From: Dave <email@hidden>
- Date: Tue, 02 Jun 2015 20:32:38 +0100
Hi,
I’m trying to clear all the Items from a Tree View apart from the Root Item.
When my View gets initialized, it creates a Section called: “OBJECTS”, this is the Item that has the Show/Hide in Title.
Then when I get a Notification, I add items to the Tree Controller, this works fine.
The “OBJECTS” Section, has an Index Path of: Index=0 Length=1.
The first Item I add (“Object-A:) to the “OBJECTS” section, is a Top Level container for a Hierarchy of Objects (hence using a Tree Controller to display it), this has an Index Path of Index:0.0 Length=2. It then adds all the child objects inside it, Index Paths, 0.0.0, 0.0.1, 0.0.2, etc.
There may be more than one object in the “OBJECTS" section, e.g. Object-B has Index Path 0.1.
I get small changes to the Hierarchy from time to time and also updates to the Data in the Leaf Nodes. This all work wonderfully.
There are two notifications that I have yet to handle: “Clear All” and “Replace”. In order to handle these I need to clear all the Items from the “Objects” section.
I tried doing this:
myIndexPath = [self newIndexPathWithObjectIndex:0];
[self.pTreeController removeObjectAtArrangedObjectIndexPath: myIndexPath];
myIndexPath is set to 0.0, length 2. But this removes the “OBJECTS” section too (at Index Path 0 Length 1).
If I don’t clear the Section, then I end up for duplicates.
So, finally, my question is how do I remove everything inside the “OBJECTS” Section?
Thanks a lot for any help.
Cheers
Dave
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