PPT Slide

////////////////////////////////////////////////////////////////////////////

// Notify light switch observers of a change in the switch state.

// The parameter is true if ON is being requested (pushing the top of the

// switch), false if OFF is being requested (pushing the bottom).

void LightSwitch::notifyClients (bool state)

{

// Loop to notify all clients...

LightSwitchObserver* observer;

for (observer = getFirstObserver();

observer;

observer = getNextObserver())

{

observer->lightSwitchChange (state, this);

}