public Form1()
{
InitializeComponent();
Lits_button = new List <My_button>();
up = new My_button(0, -1);
down = new My_button(0, 1);
left = new My_button(-1, 0);
right = new My_button(1, 0);
Lits_button.Add(up);
Lits_button.Add(down);
Lits_button.Add(left);
Lits_button.Add(right);
my_but = new ConcreteObserver(button6, Lits_button);
my_but1 = new ConcreteObserver(button5, Lits_button);
my_but2 = new ConcreteObserver(button7, Lits_button);
up.Attach(my_but);
down.Attach(my_but);
left.Attach(my_but);
right.Attach(my_but);
my_but.Activ_text();
up.Attach(my_but1);
down.Attach(my_but1);
left.Attach(my_but1);
right.Attach(my_but1);
my_but1.Activ_text();
up.Attach(my_but2);
down.Attach(my_but2);
left.Attach(my_but2);
right.Attach(my_but2);
my_but2.Activ_text();
}
public void Detach(Observer observer)
{
observers.Remove(observer);
}
public void Attach(Observer observer)
{
observers.Add(observer);
}