ITT Rule IDL Version 7.0 Manuel d'utilisateur télécharger pdf (Page 310)

310 Chapter 13: Creating a User Interface Service

Example: Changing a Property Value iTool Developer’s Guide

PRO opName__define

struct = {opName, $

inherits IDLitDataOperation $

}

END

Discussion

Only two methods are required: Init and DoExecuteUI. Since this operation is based

on the IDLitDataOperation class, all interaction with the iTools undo/redo system is

automated.

Even though all of the items that are currently selected in the iTool are retrieved by

the GetSelectedItems method, only the first item is passed to the SrvExample user

interface service for processing. Handling multiple selected items would require a

more complicated user interface.

The process of defining an IDLitDataOperation is discussed in detail in Chapter 7,

“Creating an Operation”.

Registering the SrvExample Service

In order for the SrvExample user interface service to be available, it must be

registered with the current iTool. The following line in the iTool’s launch routine

allows the service to be called with the name “Example Service”:

ITREGISTER, 'Example Service', 'srvExample', /UI_SERVICE

Registering the opName Operation

To use the opName operation within an iTool, the operation must be registered in the

iTool’s definition. The following statement registers the operation with the name

“Property Name” and places it in the Operations menu of the iTool.

self->RegisterOperation, 'Property Name', 'opName', $

IDENTIFIER = 'Operations/PropertyName'

Invoking the opName Operation

To use the SrvExample service, the user would launch an iTool for which the

opName operation is registered, select an iTool component in the window, and select

Property Name from the Operations menu.

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ITT Rule IDL Version 7.0 Manuel d'utilisateur Page 310