Growing NSTableView Row Height

Question

I have a view-based NSTableView in a MacOSX app that structures data nicely. I would like to implement the NSTableView to have row heights which grow with the content of the data entered into one of the NSTextViews. I've subclassed an NSTextView to "grow" with the user text but the issue is that having the field embedded in the TableView causes the field to be clipped.

Does anyone have any suggestions as to how to go about implementing a growing row size?

Answer 1

You need to implement -tableView:heightOfRow: in your table view delegate and return the appropriate height for the row. Furthermore, you need to monitor the text views for changes in their height and call -noteHeightOfRowsWithIndexesChanged: on the table view when any of them changes. To monitor the height of the text views, it should suffice to observe the NSViewFrameDidChangeNotification that they will post.

(If you're using auto layout generally in your UI, I think you will have to leave the text views with translatesAutoresizingMaskIntoConstraints on, place them manually, and set their autoresizing masks as appropriate. Then, you would avoid setting any other constraints on them. This is because you need the frame to be set by the text layout manager but not by auto layout.)