Inside Macintosh: Programmer's Guide to MacApp / Part 2 - Working With MacApp

Chapter 16 -
Working With Documents

This chapter includes recipes and sample code that demonstrate how to

• work with documents (a general outline)
• revert to the previously saved version of a document
• use a designator to save a document's current selection
• save the display state of a document and restore it when the document is opened

MacApp's document classes are described in detail in Chapter 7, "Document Handling."

Recipes for turning documents into electronic mail can be found in Chapter 29, "Working With PowerTalk Mailers."

For an overview of how to read and write a document with a stream, see Chapter 27, "Working With Streams."

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Chapter Contents

Overview

Creating and Initializing a Document

The DoInitialState Method

The DoMakeViews Method

The UntitledName and SetTitle Methods

The DoPostMakeViews Method

Saving a Document's Print Information

Recipes--Documents

Working With Documents--A General Outline

Recipe--Reverting to a Previous Version of a Document

Include the Revert Menu Item in Your File Menu

Override FreeData in Your Document Class

Override DoInitialState in Your Document Class

Override RevertDocument in Your Document Class

Override ShowReverted in Your Document or View Class

Recipe--Saving the Current Selection With a Designator

Override SetUserSelection in Your Document Class

Override RevealSelection in Your Document Class

Recipe--Saving and Restoring a Document's Display State

Define a Display State Information Record and a Document Field

Add a Boolean Field to Specify Reopening

Write the Display State Record When Writing

Read the Display State Record When Reading

Set the Document's Display State From the Record When Reopening