Started reimplementing Box.

redo/osxaltest/box.swift

@@ -0,0 +1,46 @@
+// 7 august 2015
+import Cocoa
+
+struct BoxControl {
+	var c: Control
+	var stretchy: Bool
+}
+
+class Box : NSView, Control {
+	private var controls: [BoxControl]
+	private var parent: Control?
+	private var padded: Bool
+
+	init(_ padded: Bool) {
+		self.controls = []
+		self.parent = nil
+		self.padded = padded
+
+		super.init(frame: NSZeroRect)
+		self.translatesAutoresizingMaskIntoConstraints = false
+	}
+
+	func Add(control: Control, stretchy: Stretchy) {
+		var c BoxControl
+
+		c.c = control
+		c.stretchy = stretchy
+		self.addSubview(c.c.View())
+		self.controls.append(c)
+		// TODO relayout
+	}
+
+	func View() -> NSView {
+		return self
+	}
+
+	func SetParent(p: Control) {
+		self.parent = p
+	}
+
+	func Relayout() {
+		if self.parent != nil {
+			self.parent?.Relayout()
+		}
+	}
+}