Observable¶
This page describes the class Observable`
The class Observable
provides a minimal implementation needed for an observable in the observer pattern.
An observable can have more than one observer.
When an important value changes in the observable, it sends notifications to all its observers.
Usually Observable
serves as a parent class for multiple inheritance, e.g.
class MultiEvaluator : public Evaluator<T>, public Observable
- Code:
Public Methods¶
constructor
¶
Observable();
The constructor does nothing.
addObserver
¶
void addObserver(Observer *pObs);
pObs
Observer object to be added to observer list.
notifyObservers
¶
void notifyObservers(int iType, const void *pCom);
iType
Type of event.
pCom
A pointer to any kind of data which might be needed.
Notifies all Observer
objects by calling their notify
method, passing this
as the first parameter:
m_vObservers[i]->notify(this, iType, pCom)