Inside Macintosh: Programmer's Guide to MacApp / Part 1 - MacApp Theory and Architecture

Chapter 2 -
Basic Operations

This chapter describes two basic features that are used by all applications built with MacApp:

• Multiple inheritance. MacApp is written in C++, with broad support for multiple inheritance. Many of MacApp's key classes use multiple inheritance, so your classes that descend from MacApp classes will use it too.
• The TObject class. The TObject class is the common ancestor for most classes in the MacApp class library. Among other things it provides support for runtime type information (RTTI) operations, creating and deleting objects, and establishing dependency relationships between objects.

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Chapter Contents

Multiple Inheritance

Runtime Type Information

The ClassDesc Class

Inserting RTTI Information Into Your Classes

Initializing RTTI Information

Registering Class Information

Including Code for a Class

Creating New Objects by Signature, Class ID, or Class Name

Dynamic Casting

Virtual Destructors

TObject

RTTI Fields and Methods

Initializing and Freeing Objects

Creating and Deleting Objects

Dependency Relationships

Reading and Writing Streams

Cloning Objects

Implementation of Cloning

Complications of Cloning

Comparing Objects

The SubClassResponsibility Method