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Building the User Interface

The next step in creating a Lisp version of the currency converter application is to construct the user interface. Apple's tutorial describes in detail how to do this.

Apple's Tutorial

Apple's tutorial explains how to use InterfaceBuilder to create the user interface, and how to use XCode to create project files and write Objective-C code. Our project uses Lisp instead of Objective-C, and does not use XCode project files, so you can skip the part of Apple's tutorial that explains how to use XCode.

Using InterfaceBuilder to Create the UI

We'll begin by using Apple's InterfaceBuilder application to create a nibfile. The nibfile contains archived versions of the Objective-C objects that define the application's user interface. When you launch an application, Mac OS X uses the archived objects in the nibfile to create the windows and menus you see on the screen.

Start by locating Apple's InterfaceBuilder application. If you installed Apple's Developer Tools, InterfaceBuilder should be in the folder "/Developer/Applications/?":

Finder location of !InterfaceBuilder

NOTE: If you have not installed Apple's Developer Tools, you should do that now. You will not be able to build the CurrencyConverter? example without them. The Developer Tools are distributed as an optional install with Mac OS X 10.5 ("Leopard"). Look for the "XCode Tools" package in the "Optional Installs" folder on the Mac OS 10.5 install disk.

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