SAS Object-Oriented Programming Concepts

Object-Oriented Development and the SAS Component Object Model

The SAS Component Object Model (SCOM) is an object-oriented programming model that provides a flexible framework for SAS/AF component developers. With SCOM, you can develop plug-and-play components that adhere to simple communication rules, which in turn make it easy to share information between components.

A component in SCOM is a self-contained, reusable object with specific properties, including

a set of attributes and methods
a set of events that the object sends
a set of event handlers that execute in response to various types of events
a set of supported or required interfaces.

With SCOM, you can design components that communicate with each other, using any of the following processes:

Attribute linking	enabling a component to change one of its attributes when the value of another attribute is changed.
Model/view communication	enabling a view (typically a control) to communicate with a model based on a set of common methods that are defined in an interface.
Drag and drop operations	enabling information to be transferred from one component to another by defining "drag" attributes on one component and "drop" attributes on the other.
Event handling	enabling a component to send an event that another component can respond to by using an associated event handler.

For more information on component communication with SCOM, see Adding Communication Capabilities to Components.

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