Saving to TIFF
by Michael Mahoney, Simson Garfinkel
Building Cocoa Applications: A Step by Step Guide
- Building Cocoa Applications: A Step-by-Step Guide
- Preface
- I. Cocoa Overview
- 1. Understanding theAqua Interface
- What Makes Mac OS X So Special?
- A Quick Look at the Mac OS X User Interface
- Basic Principles of the Aqua Interface
- The Mouse and Cursor
- Window Types and Behavior
- Menus and the Menu Bar
- The Dock
- Controls
- The Finder
- Configuring Your Desktop, Step by Step
- Menu Guidelines and Keyboard Equivalents
- Working with the Filesystem,Step by Step
- Summary
- Exercises
- References
- 2. Tools for Developing Cocoa Applications
- 3. Creating a Simple Application with Interface Builder
- 4. An Objective-C ApplicationWithout Interface Builder
- The Tiny.m Program
- An Introduction to Objective-C
- Objects and Classes
- Methods and Messaging
- The id Data Type
- A Simple Class Example
- Creating and Initializing Objects
- The @interface Directive
- The #import Directive
- Destroying Objects
- The @implementation Directive
- The +alloc Method and the NSObject Root Class
- NSString, NSMutableString, and NSLog
- autorelease and the NSAutoreleasePool Class
- Tiny.m Revisited
- Summary
- Exercises
- References
- 1. Understanding theAqua Interface
- II. Calculator: Building a Simple Application
- 5. Building a Project: A Four-Function Calculator
- Getting Started: Building the Calculator Project
- Building the Calculator’s User Interface
- Building the Calculator’s Controller Class
- Customizing Buttons and Making Connections
- Compiling and Running a Program
- Compiler Error Messages
- The enterDigit: Action Method
- Adding the Four Calculator Functions
- Adding the Unary Minus Function to the Controller Class
- The Files in a Project
- Summary
- Exercises
- 6. Nibs and Icons
- 7. Delegation and Resizing
- 8. Events and Responders
- 9. Darwin and the Window Server
- 5. Building a Project: A Four-Function Calculator
- III. MathPaper: A Multiple-Document, Multiprocess Application
- 10. MathPaper and Cocoa’sDocument-Based Architecture
- 11. Tasks, Pipes, and NSTextView
- 12. Rich Text Format and NSText
- 13. Saving, Loading, and Printing
- 14. Drawing with Quartz
- 15. Drawing in a Rectangle: More Fun with Cocoa Views
- IV. GraphPaper: A Multithreaded, Mouse-Tracking Application
- 16. GraphPaper: A Multithreaded Application with a Display List
- GraphPaper’s Design
- Working with Multiple Threads
- Building the GraphPaper Application
- Changes to the Evaluator Back End
- Building GraphPaper’s Interface
- The GraphView Class Interface File
- The GraphView Class Implementation File
- The initWithFrame: Method
- Implementing the Display List
- Scaling the GraphView and the drawRect: Method
- The Data Stuffer Methods
- Stopping a Running Graph
- The Graph Displayer
- The Segment Class
- Testing GraphPaper
- Extending the Display List
- Summary
- Exercises
- References
- 17. Color
- Colors and Color Objects
- Adding Color to GraphPaper
- Creating a Preferences Panel
- The Controller Class
- Creating the Preferences Nib, Panel, and PrefController
- PrefController Class Implementation
- ColorGraphView
- The ColorGraphView Class Implementation
- Setting the Colors
- Setting the Initial Color
- The GraphView, Segment, and Label Classes
- Testing GraphPaper’s Color
- Summary
- Exercises
- 18. Tracking the Mouse
- 19. Zooming and Saving Graphics Files
- 20. Pasteboards, Services, Modal Sessions, and Drag-and-Drop
- 21. Preferences and Defaults
- 16. GraphPaper: A Multithreaded Application with a Display List
- A. Cocoa Resources
- Index
- Colophon
Under certain circumstances, you might want to generate a TIFF file instead of a PDF file. TIFF files can be displayed on Macs running Mac OS 9 and can be transferred to numerous applications on Windows- or Unix-based systems.
We’ll use the NSImage class to convert the PDF generated in the previous section into a TIFF representation. Then we’ll ask the NSImage instance to write its image, in TIFF format, to a second stream. This second stream will then be saved to the file that the user specifies.
Insert the following TIFFForView: method declaration into
Controller.h:- (NSData *)TIFFForView:(NSView *)aView;Insert the following TIFFForView: method into
Controller.m:- (NSData *)TIFFForView:(NSView *)aView { NSImage *image = [[NSImage alloc] initWithData:[self PDFForView:aView]]; [image autorelease]; return [image TIFFRepresentation]; }
Now that we have our TIFFForView: method to save in TIFF format, how should we invoke it? One way would be to create a second menu item — for example, “Save Graph as TIFF”. But a better (and more common) interface technique is to provide the user with file-format choices in the Save sheet. The way to do this is with an accessory view.
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