swift osx application without nib

app.swift

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {

  let app: NSApplication
  let controller: NSWindowController

  init(app: NSApplication) {
    self.app = app
    self.controller = NiblessWindowController()
  }

  func applicationDidFinishLaunching(aNotification: NSNotification?) {
    println("application started!")
    controller.showWindow(nil)
    app.activateIgnoringOtherApps(true)
  }

  func applicationWillTerminate(aNotification: NSNotification?) {
    println("application terminated!")
  }

  func applicationShouldTerminateAfterLastWindowClosed() -> Bool {
  	return true
  }
}

class Menu {
  let app: NSApplication
  
  init(app: NSApplication) {
    self.app = app
    self.app.menu = mainMenu()
  }

  func mainMenu() -> NSMenu {
  	let tree = [
      "Apple": [
          NSMenuItem(title: "Quit",  action: "terminate:", keyEquivalent:"q"),
      ],
    ]
    let result = NSMenu(title: "MainMenu")
    for (title, items) in tree {
      let menu = NSMenu(title: title)
      if let item = result.addItemWithTitle(title, action: nil, keyEquivalent:"") {
	      result.setSubmenu(menu, forItem: item)
	      for item in items { 
		      menu.addItem(item) 
	      }
      }
    }
    return result
  }
}

class NiblessWindowController: NSWindowController {
	required init(coder: NSCoder) {
		fatalError("not implemented")
  }
	
	override init() {
    super.init(window: nil)
    let rect = NSMakeRect(0, 0, 480, 320)
    let style = NSTitledWindowMask | NSClosableWindowMask | NSResizableWindowMask
    let window = NSWindow(contentRect:rect, styleMask:style, backing:.Buffered, defer:false)
    window.title = "App"
    self.window = window
  }
}

let app = NSApplication.sharedApplication()
let delegate = AppDelegate(app: app)
app.delegate = delegate

let menu = Menu(app: app)

app.setActivationPolicy(.Regular)
atexit_b { app.setActivationPolicy(.Prohibited); return }
app.run()

osx-nibless

.PHONY: build

build:
  @DEVELOPER_DIR="/Applications/Xcode.app" SDKROOT="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk" xcrun swiftc -o app app.swift && ./app