Using Drag and Drop with NSTableView
Nate Thompson compiled a tutorial on how to implement drag & drop in NSTableView. It's a good read.
I remember how weird it felt to implement this the first time. Drag & drop is actually realized via the pasteboard. So it's more like cut and paste with a visual representation. From this you get the ability to put multiple content representations into the pasteboard at once, so the drop container can decide how to handle whatever it receives.
Fixing NSTableView Cell Backgrounds by Deactivating NSSplitViewItem's Visual Effects
I discovered my own idiocy and found that I overlooked which initializer of NSSplitViewItem was called. Apparently, the sidebar-related one adds vibrancy by default. Dealing with un-vibrancifying a table view might still be interesting, so I leave this up.
Drawing Custom Alternating Row Backgrounds in NSTableViews with Swift
This is an old hat in Cocoa: when you change the appearance of NSTableRowViews, they will indeed look different – but the enclosing table view itself will still draw the system default background to fill the space below the last row. Similarly, when you have scrolling elasticity enabled and scroll above the topmost row, whatever is being drawn there won't match your custom styled rows, either.
Transparent NSTableView Headers
An NSTableView is usually embedded in a NSScrollView. If you set the columns not to span the full width, the two of them will take care of drawing an empty table header cell to the right so that the interface doesn't look weird. But I want to have a weird interface. Because TableFlip's tables are different than the usual NTableView use cases.
The Surprising Intricacies of Editing Parts of NSTableView
Editing NSTableView cells with a double-click is the default behavior. I wrote about how to make the column header cells editable already. But in order to figure out how to end an active editing session when the user hits ⌘S to save the document, I grew more and more disappointed by the day.
How to Edit NSTableView Headers with a Double-Click
When you work with view-based NSTableViews, cells by default contain a NSTextField. You can edit cell contents with them. The headers are not designed to be edited, though. You don't have much control over the column headings from Interface Builder. So you have to build this yourself.