nscollectionview

I have an NSCollectionView bound to an NSArrayController. I want to get drag and drop working, so I create a delegate and implement the methods -(BOOL)collectionView:(NSCollectionView *)collectionView canDragItemsAtIndexes:(NSIndexSet *)indexes withEvent:(NSEvent*)event -(BOOL)collectionView:(NSCollectionView *)collectionView acceptDrop:(id < NSDraggingInfo >)draggingInfo index:(NSInteger)index dropOperation:(NSCollectionViewDropOperation)dropOperation -(NSDragOperation)collectionView:(NSCollectionView *)collectionView validateDrop:(id < NSDraggingInfo >)draggingInfo proposedIndex:(NSInteger *

NSCollectionViewFlowLayout produces a layout with items justified on the right margin or, if the container is only wide enough for one item, centres items. I was expecting an alignment option, e.g. on the delegate, but am not finding anything in the docs. Does it require subclassing NSCollectionViewFlowLayout to achieve this? Obliquely Here is a subclass that produces a left justified flow layout: class LeftFlowLayout: NSCollectionViewFlowLayout { override func layoutAttributesForElementsInRect(rect: CGRect) -> [NSCollectionViewLayoutAttributes] { let defaultAttributes = super

I am wanting something similar to how iWork has the template selection screen for Pages when you can select different templates, and each view contains different info has difference sizes etc. I have tried subclassing NSCollectionView and determining which view to display using the newItemForRepresentedObject method (as opposed to using itemPrototype view Interface Builder), but it for some reason doesn't position the views correctly, and it does not show the correct number of views for the number of items present. Here is my code. I was hoping someone may have a better way to do this, or an

AppKit Release Notes for OS X v10.11 suggests that collection view items can be resized on a per-item basis: Item size can be determined globally for all of a CollectionView’s items (by setting an NSCollectionViewFlowLayout’s “itemSize” property), or can be varied from one item to the next (by implementing -collectionView:layout:sizeForItemAtIndexPath: on your CollectionView’s delegate). In my case, my CollectionViewItem consists of a single label that contains a string of varying length. I'm using the NSCollectionView to display an array of strings, as NSStackViews don't support array

There is probably a simple mistake that I'm making, but I simply cannot get dropping of files onto an NSCollectionView to work even in the most basic way. In a test project, I have an NSCollectionView on a window, and the view controller is both its delegate and data source. I want to be able to drag files from the Finder onto this collection view. From reading the docs, all I should have to do is: Register for dragged type(s): - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. NSLog(@"Registering dragged types for collection view: %@", self