"Head First design mode" C # implementation (iii)--appearance mode

Appearance mode-provides a unified interface for accessing a group of interfaces in a subsystem. The appearance defines a high-level interface to make the subsystem easier to use.

　　

A look contains a lot of objects and operations on them, making it easier to repeat these operations.

If there is a light in the living room (Lights)

　　

class Lights    {        publicvoid on ()        {            Console.WriteLine ("Lights on " );        }          Public void off ()        {            Console.WriteLine ("Lights off");        }    }

Television (TV)

　　

class TV    {        publicvoid on ()        {            Console.WriteLine ("TV -On " );        }          Public void off ()        {            Console.WriteLine ("TV off");        }    }

and CD player (Dvdplaer)

　　

classDvdplayer { Public voidOn () {Console.WriteLine ("DVD player on."); }         Public voidoff () {Console.WriteLine ("DVD player off"); }         Public voidPlay () {Console.WriteLine ("Start playing"); }         Public voidEnd () {Console.WriteLine ("End End playing"); }    }

You can define an appearance-cinema mode, which provides two ways to start watching a movie and ending a movie, respectively, for a series of actions.

 classfacade {TV TV;        Dvdplayer DVD;        Lights Lights;  Publicfacade (TV TV, Dvdplayer DVD, Lights Lights) { This. TV =TV;  This. DVD =DVD;  This. Lights =lights; }         Public voidWatchmovie () {Console.WriteLine ("Get ready to watch a movie");            Lights.off ();            Tv.on ();            Dvd.on ();        Dvd.play (); }         Public voidEndmovie () {Console.WriteLine ("\nshutting movie theater down.");            Lights.on ();            Dvd.end ();            Dvd.off ();        Tv.off (); }    }

This allows for a convenient one-click Cinema mode without having to ' personally ' operate a variety of devices each time.

class program    {        staticvoid Main (string[] args)        {            new  TV ();             New  dvdplayer ();             New Lights ();             New facade (tv,dvd,lights);            Facade.watchmovie ();            Facade.endmovie ();            Console.readkey ();        }    }

Output Result:

"Head First design mode" C # implementation (iii)--appearance mode