static void Main(string[] args)
{
Console.WriteLine("***State Pattern Demo***\n");
TV tv = new TV();
Console.WriteLine("User is pressing buttons in the following sequence:");
Console.WriteLine("Off->Mute->On->On->Mute->Mute->Off\n");
tv.PressOffButton();
tv.PressMuteButton();
tv.PressOnButton();
tv.PressOnButton();
tv.PressMuteButton();
tv.PressMuteButton();
tv.PressOffButton();
}
public void PressMuteButton(TV context)
{
Console.WriteLine("You pressed Mute button. Going from On to Mute mode.");
tvContext.CurrentState = new Mute(context);
}
public On(TV context)
{
Console.WriteLine("TV is On now.");
this.tvContext = context;
}
public void PressOnButton(TV context)
{
Console.WriteLine("You pressed On button. TV is already in On state.");
}
public void PressOffButton(TV context)
{
Console.WriteLine("You pressed Off button. Going from On to Off state.");
tvContext.CurrentState = new Off(context);
}
public void PressMuteButton(TV context)
{
Console.WriteLine("You pressed Mute button. TV is already in Mute mode.");
}
public void PressOnButton(TV context)
{
Console.WriteLine("You pressed On button. Going from Mute mode to On state.");
tvContext.CurrentState = new On(context);
}
public Mute(TV context)
{
Console.WriteLine("TV is in Mute mode now.");
this.tvContext = context;
}
public void PressMuteButton(TV context)
{
Console.WriteLine("You pressed Mute button. TV is already in Off state, so Mute operation will not work.");
}
public void PressOffButton(TV context)
{
Console.WriteLine("You pressed Off button. TV is already in Off state");
}