private void ValueHasChanged(Object sender, EventArgs e)
{
Speedometer speedo = (Speedometer)sender;
if (speedo.CurrentSpeed > SPEED_TO_ALERT)
{
Console.WriteLine("** ALERT ** Driving too fast! ("
+ speedo.CurrentSpeed + ")");
}
else
{
Console.WriteLine("... nice and steady ... ("
+ speedo.CurrentSpeed + ")");
}
}
static void Main()
{
// Create a speedometer...
Speedometer speedo = new Speedometer();
// Create a monitor...
SpeedMonitor monitor = new SpeedMonitor(speedo);
// Add automatic gearbox as an observer
AutomaticGearbox auto = new AutomaticGearbox(speedo);
// Drive at different speeds...
speedo.CurrentSpeed = 50;
speedo.CurrentSpeed = 70;
speedo.CurrentSpeed = 40;
speedo.CurrentSpeed = 100;
speedo.CurrentSpeed = 69;
Console.Read();
}
static void Main()
{
// Create a speedometer...
Speedometer speedo = new Speedometer();
// Create a monitor...
SpeedMonitor monitor = new SpeedMonitor(speedo);
// Add automatic gearbox as an observer
AutomaticGearbox auto = new AutomaticGearbox(speedo);
// Drive at different speeds...
speedo.CurrentSpeed = 50;
speedo.CurrentSpeed = 70;
speedo.CurrentSpeed = 40;
speedo.CurrentSpeed = 100;
speedo.CurrentSpeed = 69;
Console.Read();
}
private void ValueHasChanged(Object sender, EventArgs e)
{
Speedometer speedo = (Speedometer)sender;
if (speedo.CurrentSpeed <= 10)
{
Console.WriteLine("Now in first gear");
}
else if (speedo.CurrentSpeed <= 20)
{
Console.WriteLine("Now in second gear");
}
else if (speedo.CurrentSpeed <= 30)
{
Console.WriteLine("Now in third gear");
}
else
{
Console.WriteLine("Now in fourth gear");
}
}
public AutomaticGearbox(Speedometer speedo)
{
speedo.ValueChanged += ValueHasChanged;
}
public SpeedMonitor(Speedometer speedo)
{
speedo.ValueChanged += ValueHasChanged;
}
public SpeedMonitor(Speedometer speedo)
{
speedo.ValueChanged += ValueHasChanged;
}
public AutomaticGearbox(Speedometer speedo)
{
speedo.ValueChanged += ValueHasChanged;
}
