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1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
2          "">
3<html xmlns="">
4  <head>
5    <title>CurrencyConverter HOWTO</title>
6    <link rel="stylesheet" type="text/css" href="HOWTO_files/stylesheets/styles.css" />
7  </head>
9  <body>
11    <div class="title">
12      <h1>CurrencyConverter HOWTO</h1>
13    </div>
15    <div class="subtitle">
16      <h2>Creating Apple's <a
17      href="">
18            Currency Converter</a> example<br/>
19          with Clozure CL
20      </h2></div>
22    <div class="subtitle">
23      <img src="HOWTO_files/images/bosco.jpg"
24           width="48" height="48" border="0" alt="" 
25           border='0'/>
26    </div>
28    <div class="byline">
29      <p>by mikel evins</p>
30    </div>
32    <div class="body-text">
33      <p>This HOWTO guide explains how to use Clozure CL (formerly
34      OpenMCL) to create a Cocoa application that is functionally
35      identical to Apple's
36      <a
37      href="">
38        Currency Converter</a> example. The most important
39        difference between Apple's example and this one is that this
40        one is implemented in Common Lisp instead of Objective C. It
41        uses Clozure CL's Objective-C bridge to provide communication
42        between the Lisp code that you write and Apple's Cocoa
43        frameworks. The resulting application looks and acts just
44        like any other Cocoa application.</p>
46      <p>This HOWTO doesn't discuss all the background information
47      that Apple's tutorial covers. Instead, we assume that you have
48      Apple's document handy for reference, and we just describe the
49      specific steps needed to build the example using
50      Apple's InterfaceBuilder application and Clozure CL.</p>
52      <p>The current version of the Clozure CL Objective-C bridge
53      includes code that was formerly distributed separately as the
54      "Bosco" application framework. Because that framework has been
55      integrated with Clozure CL proper, it no longer exists as a
56      separate project. "Bosco" now names only the decorative rodent
57      at the top of this page.</p>
58    </div>
60    <div class="section-head">
61      <h2>Apple's Currency Converter Example</h2>
62    </div>
64    <div class="body-text">
65      <p>It will be helpful in understanding this example if you can
66      easily refer to
67      Apple's <a href="">
68      Currency Converter</a> tutorial while working through this
69      HOWTO. You might consider opening a separate window or tab, and
70      keeping the Apple example handy while you work.</p>
72      <p>In some ways, the Lisp version of the example is simpler
73      than the Objective C example, but the basic concepts are the
74      same. In particular, the Lisp example follows the same
75      <a
76      href="">
77        Model-View-Controller</a> paradigm that the Apple tutorial
78        uses. If you are new to Cocoa programming, or if you are not
79        familiar with how it uses the Model-View-Controller paradigm,
80        it's probably a good idea to read through the Apple example in
81        full, paying special attention to the Model-View-Controller
82        section. Once you've done that, keep the Apple pages handy in
83        a window for easy reference.</p>
85      <p>This Common Lisp version of the Currency Converter example
86      uses Apple's InterfaceBuilder application to build a window and
87      main menu, and then uses Common Lisp code to load and operate
88      that user interface. The Common Lisp code relies on Clozure CL's
89      Objective-C bridge to provide communication between the running
90      Lisp code and Apple's Cocoa frameworks. Once the code is
91      complete, we use the BUILD-APPLICATION function to save a
92      working Cocoa application bundle. That bundle looks and acts
93      just like any other Cocoa application.</p>
95    </div>
97    <div class="section-head">
98      <h2>Requirements Before You Start</h2>
99    </div>
101    <div class="body-text">
102      <p>In order to build this example you will need:</p>
104      <ul>
105        <li><p>Mac OS X Leopard (version 10.5.x) or Mac OS X Tiger
106        (version 10.4.x)</p></li>
107        <li><p>Apple's XCode development tools</p></li>
108        <li><p>Apple's InterfaceBuilder application (included with XCode)</p></li>
109        <li><p>A recent version of Clozure CL</p></li>
110        <li><p>The Apple <a
111      href="">
112        Currency Converter</a> example, for reference</p></li>
113      </ul>
114    </div>
116    <div class="nav">
117      <p><a href="HOWTO_files/pages/making_project.html">next</a></p>
118    </div>
120  </body>
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