How do I override layout of NSTableHeaderView?

Question

I am trying to produce a custom header for my NSTableView. I would like to change the font of the header text and remove the borders and vertical separators.

My curr

Answer 1

You will need to take over the drawing yourself by subclassing NSTableHeaderCell, like so:

final class CustomTableHeaderCell : NSTableHeaderCell {
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override init(textCell: String) {
        super.init(textCell: textCell)
        self.font = NSFont.boldSystemFontOfSize(20)
    }

    override func drawWithFrame(cellFrame: NSRect, inView controlView: NSView) {
        // skip super.drawWithFrame(), since that is what draws borders
        self.drawInteriorWithFrame(cellFrame, inView: controlView)
    }

    override func drawInteriorWithFrame(cellFrame: NSRect, inView controlView: NSView) {
        let titleRect = self.titleRectForBounds(cellFrame)
        self.attributedStringValue.drawInRect(titleRect)
    }
}

If you are setting up the table programmatically, you would do it like:

let col = NSTableColumn(identifier: id)
col.headerCell = CustomTableHeaderCell(textCell: title)
col.title = title
self.dataTableView.addTableColumn(col)

Otherwise, you should be able to just set the name of your class to your subclass' name in Interface Builder.