CERN -> IPT Group -> FrameMaker at CERN
	Information Service User's Guide

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15.1 ISCallbackEvent

#include <is/callbackevent.h>

void user_callback(ISCallbackEvent * isc) { ... }

This class is used to pass the information about changes in the IS repository to user's callback function. If callback function with the ISCallbackEvent parameter is used for the information subscription (see Chapter "ISInfoReceiver" class), the modified information object values are not transferred from the IS repository to the subscribing applications. Instead the subscriber receives only name, type and modification time of the affected information. In order to receive the information value, one has to use another callback function which has Chapter "ISCallbackInfo" as parameter type.

This class has no public constructors and can't be created by a user. The pointer to an instance of this class is passed as an argument of the user callback function.

const char * 

name();

Returns name of the changed information.

void * 

parameter();

Returns user's parameter that has been provided via the subscribe method of the ISInfoReceiver method.

ISInfo::Reason 

reason();

Returns the reason of notification.

int 

tag();

Returns tag of the changed information object.

const OWLTime &

time();

Returns time of the last modification of the information object. In fact that's the time of the event which has caused the callback function invocation.

ISType 

type();

Returns type of the changed information object.