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5-16 SOMobjects Base Toolkit Programmer’s Reference

Manual

someRegisterEv Method

Purpose

Registers the (object, method, Environment parameter) combination of a callback with

EMan, given a specified registerData object.

IDL Syntax

long someRegisterEv (

in SOMEEMRegisterData registerData,

in SOMObject targetObject,

inout Environment callbackEv,

in string targetMethod,

in void *targetData);

Description

This method allows for registering an event interest with EMan with an object method as

callback. The callbackEv is used as the environment pointer when EMan makes the

callback. It is assumed that the target method has been declared as using IDL callstyle. The

event of interest and its details are filled in a registration data object registerData. The

information about the callback routine is indicated by targetObject and targetMethod.

A mismatch in the target method’s callstyle and the registration method called

(someRegister vs. someRegisterEv) can result in unpredictable results.

Note: The target method is called using name-lookup method resolution.

Parameters

receiver A pointer to an object of class SOMEEMan.

ev A pointer to the Environment structure for the calling method.

registerData A pointer to registration data object that contains all the necessary

information about the event for which an interest is being registered with

EMan.

targetObject A pointer to the object which is the target of the callback method

callbackEv A pointer to the Environment structure to be passed to the callback method

targetMethod The name of the callback method.

targetData A pointer to a data structure to be passed to the callback method when the

event occurs.

Return Value

The registration ID.

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