protected ProgressSubject subject; // All observers will have a subject public BaseProgressObserver(ProgressSubject subject) // Subject is handed in via constructor { this.subject = subject; // Assign passed in subject to class member // We can just use generic EventHandler because we don't need to pass any data EventHandler handler = new EventHandler(ProgressHandlerMethod); subject.ProgressEvent += handler; }
public Form1() { InitializeComponent(); // Create instance of subject first so that observers can subscribe subject = new ProgressSubject(); // Instantiate our observers once subject exists progressBarObserver = new ProgressBarObserver(subject, progressBar1); trackBarObserver = new TrackBarObserver(subject, trackBar1); upDownObserver = new UpDownObserver(subject, numericUpDown1, this); }
public Form1() { InitializeComponent(); // Create instance of subject first so that observers can subscribe subject = new ProgressSubject(); // Instantiate our observers once subject exists progressBarObserver = new ProgressBarObserver(subject, progressBar1); trackBarObserver = new TrackBarObserver(subject, trackBar1); upDownObserver = new UpDownObserver(subject, numericUpDown1, this); }
// Almost exactly the same as ProgressBarObserver except with a track bar instead public TrackBarObserver(ProgressSubject subject, TrackBar trackBar) : base(subject) { this.trackBar = trackBar; }
// Send subject to base class, then assign the passed in progress bar to our class member progress bar public ProgressBarObserver(ProgressSubject subject, ProgressBar progressBar) : base(subject) { this.progressBar = progressBar; }
// Almost exactly the same as ProgressBarObserver except with a track bar instead public TrackBarObserver(ProgressSubject subject, TrackBar trackBar) : base(subject) { this.trackBar = trackBar; }
public UpDownObserver(ProgressSubject subject, NumericUpDown numericUpDown, Form form) : base(subject) { this.numericUpDown = numericUpDown; this.form = form; }
public UpDownObserver(ProgressSubject subject, NumericUpDown numericUpDown, Form form) : base(subject) { this.numericUpDown = numericUpDown; this.form = form; }
// Send subject to base class, then assign the passed in progress bar to our class member progress bar public ProgressBarObserver(ProgressSubject subject, ProgressBar progressBar) : base(subject) { this.progressBar = progressBar; }