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comparison examples/calculator/main.c @ 88:dd813dcc232c

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New example, calculator.
author Thinker K.F. Li <thinker@branda.to>
date Sat, 23 Aug 2008 15:26:47 +0800
parents
children 90428161fc61
comparison
equal deleted inserted replaced
87:8dfebf76cb59 88:dd813dcc232c
1 #include <stdio.h>
2 #include <mb_types.h>
3 #include <X_supp.h>
4 #include <shapes.h>
5 #include <tools.h>
6 #include "calculator_scr.h"
7
8 typedef struct _ex_rt ex_rt_t;
9 struct _ex_rt {
10 X_MB_runtime_t *rt;
11 calculator_scr_t *code;
12 };
13
14 static struct {
15 int c;
16 int off;
17 } tgt_list[] = {
18 { 0, OFFSET(calculator_scr_t, but_0) },
19 { 1, OFFSET(calculator_scr_t, but_1) },
20 { 2, OFFSET(calculator_scr_t, but_2) },
21 { 3, OFFSET(calculator_scr_t, but_3) },
22 { 4, OFFSET(calculator_scr_t, but_4) },
23 { 5, OFFSET(calculator_scr_t, but_5) },
24 { 6, OFFSET(calculator_scr_t, but_6) },
25 { 7, OFFSET(calculator_scr_t, but_7) },
26 { 8, OFFSET(calculator_scr_t, but_8) },
27 { 9, OFFSET(calculator_scr_t, but_9) },
28 { '+', OFFSET(calculator_scr_t, but_add) },
29 { '-', OFFSET(calculator_scr_t, but_minus) },
30 { '*', OFFSET(calculator_scr_t, but_mul) },
31 { '/', OFFSET(calculator_scr_t, but_div) },
32 { '=', OFFSET(calculator_scr_t, but_eq) },
33 { 'c', OFFSET(calculator_scr_t, but_clr) }
34 };
35
36 static int real_compute(int op, int v1, int v2) {
37 int r = v2;
38
39 switch(op) {
40 case '+':
41 r = v1 + v2;
42 break;
43 case '-':
44 r = v1 - v2;
45 break;
46 case '*':
47 r = v1 * v2;
48 break;
49 case '/':
50 r = v1 / v2;
51 break;
52 }
53
54 return r;
55 }
56
57 static void show_text(ex_rt_t *ex_rt, int num) {
58 char buf[20];
59
60 sprintf(buf, "%d", num);
61 sh_text_set_text(ex_rt->code->screen_text, buf);
62 rdman_shape_changed(ex_rt->rt->rdman, ex_rt->code->screen_text);
63 }
64
65 static void compute(ex_rt_t *ex_rt, coord_t *tgt) {
66 int i;
67 coord_t **coord_p;
68 static int num = 0;
69 static int saved = 0;
70 static int op = 0;
71
72 for(i = 0; i < 16; i++) {
73 coord_p = (coord_t **)((void *)ex_rt->code + tgt_list[i].off);
74 if(*coord_p == (void *)tgt)
75 break;
76 }
77 if(i >= 16) return;
78
79 if(i < 10) {
80 num = num * 10 + i;
81 show_text(ex_rt, num);
82 } else {
83 switch(tgt_list[i].c) {
84 case 'c':
85 saved = num = 0;
86 show_text(ex_rt, 0);
87 break;
88
89 case '+':
90 saved = real_compute(op, saved, num);
91 show_text(ex_rt, saved);
92 op = '+';
93 num = 0;
94 break;
95
96 case '-':
97 saved = real_compute(op, saved, num);
98 show_text(ex_rt, saved);
99 op = '-';
100 num = 0;
101 break;
102
103 case '*':
104 saved = real_compute(op, saved, num);
105 show_text(ex_rt, saved);
106 op = '*';
107 num = 0;
108 break;
109
110 case '/':
111 saved = real_compute(op, saved, num);
112 show_text(ex_rt, saved);
113 op = '/';
114 num = 0;
115 break;
116
117 case '=':
118 saved = real_compute(op, saved, num);
119 show_text(ex_rt, saved);
120 num = 0;
121 break;
122 }
123 }
124 rdman_redraw_changed(ex_rt->rt->rdman);
125 }
126
127 static void buttons_handler(event_t *evt, void *arg) {
128 ex_rt_t *ex_rt = (ex_rt_t *)arg;
129
130 switch(evt->type) {
131 case EVT_MOUSE_BUT_PRESS:
132 compute(ex_rt, (coord_t *)evt->cur_tgt);
133 break;
134 }
135 }
136
137 static void setup_observers(ex_rt_t *ex_rt) {
138 calculator_scr_t *calculator_scr;
139 ob_factory_t *factory;
140 subject_t *subject;
141
142 calculator_scr = ex_rt->code;
143 factory = rdman_get_ob_factory(ex_rt->rt->rdman);
144
145 subject = coord_get_mouse_event(calculator_scr->but_0);
146 subject_add_observer(factory, subject, buttons_handler, ex_rt);
147 subject = coord_get_mouse_event(calculator_scr->but_1);
148 subject_add_observer(factory, subject, buttons_handler, ex_rt);
149 subject = coord_get_mouse_event(calculator_scr->but_2);
150 subject_add_observer(factory, subject, buttons_handler, ex_rt);
151 subject = coord_get_mouse_event(calculator_scr->but_3);
152 subject_add_observer(factory, subject, buttons_handler, ex_rt);
153 subject = coord_get_mouse_event(calculator_scr->but_4);
154 subject_add_observer(factory, subject, buttons_handler, ex_rt);
155 subject = coord_get_mouse_event(calculator_scr->but_5);
156 subject_add_observer(factory, subject, buttons_handler, ex_rt);
157 subject = coord_get_mouse_event(calculator_scr->but_6);
158 subject_add_observer(factory, subject, buttons_handler, ex_rt);
159 subject = coord_get_mouse_event(calculator_scr->but_7);
160 subject_add_observer(factory, subject, buttons_handler, ex_rt);
161 subject = coord_get_mouse_event(calculator_scr->but_8);
162 subject_add_observer(factory, subject, buttons_handler, ex_rt);
163 subject = coord_get_mouse_event(calculator_scr->but_9);
164 subject_add_observer(factory, subject, buttons_handler, ex_rt);
165 subject = coord_get_mouse_event(calculator_scr->but_add);
166 subject_add_observer(factory, subject, buttons_handler, ex_rt);
167 subject = coord_get_mouse_event(calculator_scr->but_minus);
168 subject_add_observer(factory, subject, buttons_handler, ex_rt);
169 subject = coord_get_mouse_event(calculator_scr->but_mul);
170 subject_add_observer(factory, subject, buttons_handler, ex_rt);
171 subject = coord_get_mouse_event(calculator_scr->but_div);
172 subject_add_observer(factory, subject, buttons_handler, ex_rt);
173 subject = coord_get_mouse_event(calculator_scr->but_eq);
174 subject_add_observer(factory, subject, buttons_handler, ex_rt);
175 subject = coord_get_mouse_event(calculator_scr->but_clr);
176 subject_add_observer(factory, subject, buttons_handler, ex_rt);
177 }
178
179 int main(int argc, char * const argv[]) {
180 X_MB_runtime_t rt;
181 calculator_scr_t *calculator_scr;
182 ex_rt_t ex_rt;
183 int r;
184
185 r = X_MB_init(":0.0", 300, 400, &rt);
186
187 calculator_scr = calculator_scr_new(rt.rdman);
188
189 ex_rt.rt = &rt;
190 ex_rt.code = calculator_scr;
191 setup_observers(&ex_rt);
192
193 X_MB_handle_connection(&rt);
194
195 calculator_scr_free(calculator_scr);
196 X_MB_destroy(&rt);
197
198 return 0;
199 }