ITT Rule IDL Version 7.0 User Manual download pdf (Page 42)

42 Chapter 2: iTool System Architecture

iTool Messaging System iTool Developer’s Guide

The IdOriginator argument is generally the object identifier of an iTool component

object, but it can be any string value.

Notification Messages

The value of the IdMessage argument to the DoOnNotify method is a string value

that must uniquely identify the message being sent. iTool components and callback

routines that process notification messages use the value of the IdMessage string to

determine what action to take when a message arrives from an observed component.

When you call the DoOnNotify method yourself, use caution in choosing the value of

the IdMessage string. If the string you choose conflicts with a message being sent by

another iTool component, the message-handling routines may be activated at the

wrong time.

Standard iTool Messages

The following is a list of notification messages sent by components that are part of

the standard iTool distribution:

Message String Meaning

SELECTED

UNSELECTED

The selection state of an item being watched has

changed. Val ue contains the object identifier of the

component whose selection changed.

SELECTIONCHANGED The selected item within the current iTool changed.

Value contains an empty string.

ADDITEMS

MOVEITEMS

REMOVEITEMS

A call to the Add, Move, or Remove method of an

IDLitContainer that supports the IDLitIMessaging

interface was made. Va l ue contains the object

identifier of the item that was added, moved, or

removed.

SETPROPERTY The value of a property has been changed on a

component. If a single property was changed, Value

contains the identifier of the property that changed. If

multiple properties were changed, Valu e contains a

null string.

Table 2-1: Standard iTool Messages

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 429 430

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ITT Rule IDL Version 7.0 User Manual Page 42