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;
}