1 //
2 // SimpleCalc -- Randy Nelson -- NeXT Developer Training
3 // A general class that serves as a liaison between a calculator interface
4 // and a calculator engine.
5 //
6 // You may freely copy, distribute and reuse the code in this example.
7 // NeXT disclaims any warranty of any kind, expressed or implied, as to
8 // its fitness for any particular use.
9 //
10 // Created 8-8-90
11 //
12 #import <objc/Object.h>
13
14 @interface SimpleCalc:Object
15 {
16 // outlets...the front-end.
17 id display;
18 id enterKey;
19 id minusKey;
20 id infoManager;
21 id myNXStringTable;
22
23 // C++ object's can be a-part-of Objective-C objects.
24 class CalcEngine *cplus_object;
25
26 // record each previous user action
27 SEL previousAction;
28 }
29
30 // actions.
31
32 - numberKeys:sender;
33 - decimalKey:sender;
34 - operationKeys:sender;
35 - equalsKey:sender;
36 - clearKey:sender;
37 - clearAllKey:sender;
38 - infoPanel:sender;
39 - helpPanel:sender;
40
41 // delegate methods.
42
43 - windowWillClose:sender;
44 - appDidInit:sender;
45
46 - registerAction:(SEL)action;
47 - appendToDisplay:(const char *)theString;
48
49 @end