gistfile1.swift

    struct ControlGrid {
        var buttons : Dictionary<String, NSButton>
        
        let mapping = [
            "e":  (1, 0.5),
            "se": (1, 1),
            "s":  (0.5, 1),
            "sw": (0, 1),
            "w":  (0, 0.5),
            "nw": (0, 0),
            "n":  (0.5, 0),
            "ne": (1, 0),
        ]
        
        init(size: NSSize) {
            buttons = Dictionary<String, NSButton>()

            // all views appear to have a reference to the same frame
            for (name, loc) in mapping {
                for y in [0, 0.5, 1] {
                    for x in [0, 0.5, 1] {
                        if x == y && x == 0.5 {
                            break;
                        }
                        var rect = NSRect(x: size.width * x, y: size.height * y, width: 20, height: 20)
                        buttons[name] = NSButton(frame:rect)
                    }
                }
            }
        }
    }