TracMix written in Swift

AppDelegate.swift

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet var window: NSWindow

    var track: Track!

    @IBOutlet var textField : NSTextField
    @IBOutlet var slider : NSSlider

    @IBAction func mute(sender : AnyObject) {
        //NSLog("received a mute: message")
        track.volume = 0.0
        updateUserInterface()
    }

    @IBAction func takeFloatValueForVolumeFrom(sender : AnyObject) {
        /*
        var senderName: String
        if sender is NSTextField {
            senderName = "textField"
        } else {
            senderName = "slider"
        }
        NSLog("%@ sent takeFloatValueForVolumeFrom: with value %1.2f", senderName, sender.floatValue)
        */
        let newValue = sender.doubleValue
        track.volume = newValue
        updateUserInterface()
    }

    func updateUserInterface() {
        let volume = track.volume
        self.textField.doubleValue = volume
        self.slider.doubleValue = volume
    }

    func applicationDidFinishLaunching(aNotification: NSNotification?) {
        // Insert code here to initialize your application
        track = Track()
        updateUserInterface()
    }

    func applicationWillTerminate(aNotification: NSNotification?) {
        // Insert code here to tear down your application
    }


}

Track.swift

import Cocoa

class Track: NSObject {
    var volume: Double
    
    init() {
        volume = 0.0
    }
}

See:

• Start Developing Mac Apps Today: Introduction
• Your First Mac App: About Creating Your First Mac App