static void Main(string[] args)
{
//a delegate is an object that knows how to call a method (or a group of methods)
//simply -- a delegate is a reference to a method/function(s)
//why?
//For designing extensible and flexible applications (eg frameworks often used here)
//multicast delegate lets us have multiple function pointers.
//delegate is just one.
PhotoProcessor proc = new PhotoProcessor();
//interface vs delegate
//some is personal taste
//delegates event design pattern, caller doesn't need to access properties
//if photoprocessor needed to access other properties or methods a delegate wouldn't work.
//so what we've done here is we created an instance of the photofilters object so we could reference it's methods.
//we created an instance of the delegate and then assigned the method from photofilters to it.
PhotoFilters photofilters = new PhotoFilters();
PhotoProcessor.PhotoFilterHandler filterHandler = photofilters.ApplyBrightness;
//adding more points/methods
filterHandler += photofilters.ApplyContrast;
filterHandler += photofilters.Resize;
filterHandler += Program.RemoveRedeye;
proc.Process("path here", filterHandler);
//when passing the reference to the delegate you don't need the () because you're not passing anything or calling the method.
Action<Photo> filterHandler2 = photofilters.ApplyBrightness;
filterHandler2 += RemoveRedeye;
proc.SuperProces("photopath", filterHandler2);
}
