public FollowingGetProperty(IObservable <T> predecessor, T defaultValue)
{
if (predecessor == null)
{
throw new ArgumentNullException("predecessor");
}
predecessor.Subscribe(Observer2.Create <T>(SetValue));
_value = defaultValue;
}
public void Register_Observer2()
{
// Arrange
var subject = new Subject();
var observer2 = new Observer2();
// Act
var unsubscriber2 = observer2.Register(subject);
// Assert
Assert.AreEqual(1, subject.Observers.Count);
}
static void Main(string[] args)
{
Source s = new Source();
Observer1 o1 = new Observer1();
Observer2 o2 = new Observer2();
MyDelegate d1 = new MyDelegate(o1.Do);
s.Run += d1;
s.Run += o2.Do;
s.Start();
Console.ReadLine();
}
public static IDisposable Subscribe <TSource, TProperty>(this IObservable <TSource> source, IObservableGetProperty <TProperty> property)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (property == null)
{
throw new ArgumentNullException("property");
}
return(source.Subscribe(Observer2.Create <TSource>(o => property.OnNext())));
}
/// <summary>
/// Notifies the specified actions when the specified <paramref name="element"/> queries or executes the <paramref name="command"/>.
/// </summary>
/// <param name="command">The <see cref="ICommand"/> from which notifications are received.</param>
/// <param name="element">The <see cref="UIElement"/> that queries or executes the specified <paramref name="command"/>.</param>
/// <param name="onExecuted">The action that is executed when the <paramref name="command"/> is executed.</param>
/// <param name="onCanExecute">The action that is executed when the <paramref name="element"/> queries whether the <paramref name="command"/> can be executed.</param>
/// <returns>The observer's interface that enables cancelation of the subscription so that it stops receiving notifications.</returns>
public static IDisposable Subscribe(
this ICommand command,
UIElement element,
Action <EventPattern <ExecutedRoutedEventArgs> > onExecuted,
Action <EventPattern <CanExecuteRoutedEventArgs> > onCanExecute)
{
Contract.Requires(command != null);
Contract.Requires(element != null);
Contract.Requires(onExecuted != null);
Contract.Requires(onCanExecute != null);
Contract.Ensures(Contract.Result <IDisposable>() != null);
return(command.AsObservable(element).Subscribe(Observer2.CreateEither(onCanExecute, onExecuted)));
}
public void RecognizeAsync()
{
// UI スレッドでなければ動作しない？
var recognizer = new InkTextRecognizer
{
Culture = InkTextRecognizer.Culture_ja_JP,
};
recognizer.BestResultArrived.Subscribe(Observer2.Create <string>(Console.WriteLine));
recognizer.AddStroke(new[] { new Point(100, 100), new Point(100, 200) });
recognizer.RecognizeAsync();
Thread.Sleep(1000);
}
void Start()
{
Subject subject = new Subject();
Observer1 observer1 = new Observer1();
Observer2 observer2 = new Observer2();
subject.RegisterObserver(observer1);
subject.SetData("Hello World!");
subject.RegisterObserver(observer2);
subject.SetData("Re:Hello World!");
subject.RemoveObserver(observer1);
subject.SetData("Re:Re:Hello World!");
}
public void Dispose_Any_Observer()
{
// Arrange
var subject = new Subject();
var observer1 = new Observer1();
var observer2 = new Observer2();
var observer3 = new Observer3();
var unsubscriber1 = observer1.Register(subject);
var unsubscriber2 = observer2.Register(subject);
var unsubscriber3 = observer3.Register(subject);
// Act
unsubscriber2.Dispose();
// Assert
Assert.AreEqual(2, subject.Observers.Count);
}
public void PublishData(string data)
{
//Add all the observer below
//1st observer
IObserver iObserver = new Observer1();
this.OnReceive += iObserver.ReceiveData;
//2nd observer
IObserver iObserver2 = new Observer2();
this.OnReceive += iObserver2.ReceiveData;
//publish data
var handler = OnReceive;
if (handler != null)
{
handler(data);
}
}
static void Main(string[] args)
{
Console.WriteLine("***Observer Pattern Demo***\n");
//We have 3 observers-2 of them are ObserverType1, 1 of them is of ObserverType2
IObserver myObserver1 = new Observer1("Roy");
IObserver myObserver2 = new Observer1("Kevin");
IObserver myObserver3 = new Observer2("Bose");
var subject = new Subject();
//Registering the observers-Roy,Kevin,Bose Chapter 14 Observer pattern
subject.Register(myObserver1);
subject.Register(myObserver2);
subject.Register(myObserver3);
Console.WriteLine(" Setting Flag = 5 ");
subject.Flag = 5;
//Unregistering an observer(Roy))
subject.UnRegister(myObserver1);
//No notification this time Roy. Since it is unregistered.
Console.WriteLine("\n Setting Flag = 50 ");
subject.Flag = 50;
}
public Test()
{
var subject = new Subject();
var observ1 = new Observer1();
subject.Add(observ1);
var observ2 = new Observer2();
subject.Add(observ2);
subject.SomeBusinessLogic();
subject.SomeBusinessLogic();
subject.Delete(observ2);
subject.SomeBusinessLogic();
var observ3 = new Observer3();
subject.Add(observ3);
subject.SomeBusinessLogic();
}
private void attacherListeners()
{
pub = new Publisher();
Observer1 obs1 = new Observer1();
Observer2 obs2 = new Observer2();
}
