Chapter 5. Starting a Cocoa Application

In this chapter, we make the Linrg tool the heart of an application using the Mac OS X graphical human interface. Our framework for the application will be Cocoa, the application toolkit developed from NeXTStep and OpenStep; the language will be Objective-C.

Plan of Action

Program Tasks

We’ll use Linrg unchanged for the computational part of the program. Our front-end program will therefore have the tasks of

  • Storing a list of x and y data pairs

  • Allowing the user to enter and edit the data-pair list

  • Passing the data-pair list to Linrg

  • Reading the results from Linrg and displaying them to the user

Note

Keeping Linrg as a separate executable is admittedly a strange decision: The code is so simple, it would be easier ...

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