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An interface can declare one or many observables. Such an observable can be used to receive a signal on certain events within that interface.

Declaration

Observables are declared within an interface:

// This example shows an interface declaring an observable.

class ObserveMeInterface : MAXON_INTERFACE_BASES (maxon::ObserverObjectInterface) { MAXON_INTERFACE (ObserveMeInterface, MAXON_REFERENCE_NORMAL , "net.maxonexample.interfaces.observeme" );

public : //---------------------------------------------------------------------------------------- // Function makes "Ping". //---------------------------------------------------------------------------------------- MAXON_METHOD void Ping();

//---------------------------------------------------------------------------------------- // Signal fired when Ping() is called. //---------------------------------------------------------------------------------------- MAXON_OBSERVABLE ( void , ObservablePing, ( maxon::Int32 count), maxon::ObservableCombinerRunAllComponent); };

The MAXON_OBSERVABLE() attribute defines the following options: