// the event is declared as having a particular kind of event handler
// method that can be subscribed to it with: the PlayFinishedHandler.
// "Action<string>" represents, a void-return function with 1 string param.
public void Play()
{
//Console.WriteLine("Playing inserted movie " + CurrentMovie.Name);
// string interpolation syntax
// start the string with $, and you can use {} to switch "back"
// to C# code.
Console.WriteLine($"Playing inserted movie {CurrentMovie.Name}");
Thread.Sleep(3000); // wait for 3 seconds
// then, we fire the event.
//PlayFinished();
// this looks the same as a method call, but it is an event.
// it results in, all the subscribed functions being called.
// if there are no subscribers, firing the event is a null exception.
// so, we never fire an event just like that, instead, we check for null.
//if (PlayFinished != null)
//{
// PlayFinished();
//}
// must provide arguments according to the parameters on that delegate type.
PlayFinished?.Invoke(CurrentMovie.Name);
// it turns out that events have an "Invoke" method on them
// which does the same as what we wrote before
// there is a null-conditional operator "?." which is pretty cool...
// if the thing before the ?. is null, then overall it returns null / does nothing.
// otherwise, it will do member access like "." usually does.
//if (obj != null)
//{
// if (obj.prop != null)
// {
// if (obj.prop.asdf != null)
// {
// // use obj.prop.asdf
// }
// }
//}
//obj?.prop?.asdf?.whatever
// there's another one called null-coalescing operator
// ??
}
void ISoundStopEventReceiver.OnSoundStopped(ISound sound, StopEventCause reason, object userData)
{
_soundPlaying = null;
PlayFinished?.Invoke(_audioClip);
}
private void SendStopEventToListeners()
{
PlayFinished?.Invoke(_audioClip);
}