NSOutlineView

NSOutlineView: Saving expansion status

Aug 7 2020

NSOutlineView: Saving expansion status

(This is not the promised Part III of my previous series. Which is not fully functional and needs an overhaul, but right now, I am lacking time.) In most cases, users expect to find outline views as they left them. So I needed a different solution. Whether an item is expanded or not is, strictly […]

By • Application Design, Interface • • Tags:

selectionDidChange

Jan 31 2017

selectionDidChange

I’ve just discovered an unwelcome difference between func tableViewSelectionDidChange(_ notification: Notification) and func outlineViewSelectionDidChange(_ notification: Notification) (NSOutlineView inherits from NSTableView, and the protocols share a lot of similarities). When there is no valid selection in an NSOutlineView, outlineviewSelectionDidChange fires, and outlineView.selectedRow is -1. When there is no valid selection in an NSTableView, tableViewSelectionDidChange does not […]

By • Bug Reports • • Tags: ,

NSOutlineView Part 2: Making the outlineView useful

Jan 15 2017

NSOutlineView Part 2: Making the outlineView useful

Xcode 8, macOS 10.12, Swift 3.0 In Part 1 of this tutorial, we created an outlineView that, thanks to a SourceListItem protocol, was indefinitely flexible: you can have different classes on several levels, or indefinite levels (though it is probably wise to limit this programatically so you don’t nest too deep. It all depends on […]

By • Application Design, Bug Reports, Interface, Tutorials, Wiki • • Tags: ,

NSOutlineView Part1: Setting up an outlineView.

Jan 4 2017

NSOutlineView Part1: Setting up an outlineView.

Xcode 8.0, macOS 10.11 (This is Part 1 of 3; in which we will create an NSOutlineView with a flexible data structure that can be used for simple trees and for structures like the one below which contain a number of different, unrelated items. Part 2 will deal with inserting and deleting items, and reacting […]

By • Tutorials, Wiki • • Tags: , ,