Mercurial > MadButterfly
annotate examples/calculator/main.c @ 121:76ba6fd61c7d
More bug of insert sort.
elms[i] is over wrote by elms[i-1]. Save it to a local variable at
start of loop iteration for elms[i].
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Sun, 14 Sep 2008 23:40:57 +0800 |
| parents | 565b55508c8d |
| children | 17e97e92b76e |
| rev | line source |
|---|---|
| 88 | 1 #include <stdio.h> |
| 108 | 2 #include <mb/mb.h> |
| 88 | 3 #include "calculator_scr.h" |
| 4 | |
| 94 | 5 typedef struct _calc_data calc_data_t; |
| 6 struct _calc_data { | |
| 88 | 7 X_MB_runtime_t *rt; |
| 8 calculator_scr_t *code; | |
| 9 }; | |
| 10 | |
| 11 static struct { | |
| 12 int c; | |
| 13 int off; | |
| 14 } tgt_list[] = { | |
| 15 { 0, OFFSET(calculator_scr_t, but_0) }, | |
| 16 { 1, OFFSET(calculator_scr_t, but_1) }, | |
| 17 { 2, OFFSET(calculator_scr_t, but_2) }, | |
| 18 { 3, OFFSET(calculator_scr_t, but_3) }, | |
| 19 { 4, OFFSET(calculator_scr_t, but_4) }, | |
| 20 { 5, OFFSET(calculator_scr_t, but_5) }, | |
| 21 { 6, OFFSET(calculator_scr_t, but_6) }, | |
| 22 { 7, OFFSET(calculator_scr_t, but_7) }, | |
| 23 { 8, OFFSET(calculator_scr_t, but_8) }, | |
| 24 { 9, OFFSET(calculator_scr_t, but_9) }, | |
| 25 { '+', OFFSET(calculator_scr_t, but_add) }, | |
| 26 { '-', OFFSET(calculator_scr_t, but_minus) }, | |
| 27 { '*', OFFSET(calculator_scr_t, but_mul) }, | |
| 28 { '/', OFFSET(calculator_scr_t, but_div) }, | |
| 29 { '=', OFFSET(calculator_scr_t, but_eq) }, | |
| 30 { 'c', OFFSET(calculator_scr_t, but_clr) } | |
| 31 }; | |
| 32 | |
| 33 static int real_compute(int op, int v1, int v2) { | |
|
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parents:
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34 int r = v1; |
| 88 | 35 |
| 36 switch(op) { | |
| 37 case '+': | |
| 38 r = v1 + v2; | |
| 39 break; | |
| 40 case '-': | |
| 41 r = v1 - v2; | |
| 42 break; | |
| 43 case '*': | |
| 44 r = v1 * v2; | |
| 45 break; | |
| 46 case '/': | |
| 93 | 47 r = v1; |
|
89
90428161fc61
Prevent divide by zero error
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48 if(v2) |
| 93 | 49 r /= v2; |
| 88 | 50 break; |
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51 case 'n': |
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parents:
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52 r = v2; |
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parents:
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53 break; |
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parents:
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54 case 'N': |
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Thinker K.F. Li <thinker@branda.to>
parents:
90
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55 break; |
| 88 | 56 } |
| 57 | |
| 58 return r; | |
| 59 } | |
| 60 | |
| 94 | 61 static void show_text(calc_data_t *calc_data, int num, int saved, int op, |
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62 const char *suffix) { |
| 88 | 63 char buf[20]; |
| 64 | |
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65 sprintf(buf, "%d%s", num, suffix); |
| 94 | 66 sh_text_set_text(calc_data->code->screen_text, buf); |
| 67 rdman_shape_changed(calc_data->rt->rdman, calc_data->code->screen_text); | |
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parents:
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68 |
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parents:
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69 if(op == 'n') |
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parents:
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70 sprintf(buf, "None"); |
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parents:
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71 else |
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Thinker K.F. Li <thinker@branda.to>
parents:
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72 sprintf(buf, "%d%c", saved, op); |
| 94 | 73 sh_text_set_text(calc_data->code->saved_text, buf); |
| 74 rdman_shape_changed(calc_data->rt->rdman, calc_data->code->saved_text); | |
| 88 | 75 } |
| 76 | |
| 94 | 77 static void compute(calc_data_t *calc_data, coord_t *tgt) { |
| 88 | 78 int i; |
| 79 coord_t **coord_p; | |
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parents:
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80 static int valid_num = 0; |
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parents:
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81 static int factor = 1; |
| 88 | 82 static int num = 0; |
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parents:
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83 static int op = 'n'; |
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parents:
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84 static int saved = 0; |
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Thinker K.F. Li <thinker@branda.to>
parents:
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85 char buf[2] = " "; |
| 88 | 86 |
| 87 for(i = 0; i < 16; i++) { | |
| 94 | 88 coord_p = (coord_t **)((void *)calc_data->code + tgt_list[i].off); |
| 88 | 89 if(*coord_p == (void *)tgt) |
| 90 break; | |
| 91 } | |
| 92 if(i >= 16) return; | |
| 93 | |
| 94 if(i < 10) { | |
| 95 num = num * 10 + i; | |
| 94 | 96 show_text(calc_data, num * factor, saved, op, ""); |
|
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parents:
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97 valid_num = 1; |
| 88 | 98 } else { |
| 99 switch(tgt_list[i].c) { | |
| 100 case 'c': | |
| 101 saved = num = 0; | |
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parents:
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102 factor = 1; |
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3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
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103 valid_num = 0; |
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Thinker K.F. Li <thinker@branda.to>
parents:
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104 op = 'n'; |
| 94 | 105 show_text(calc_data, 0, saved, op, ""); |
| 88 | 106 break; |
| 107 | |
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92
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Thinker K.F. Li <thinker@branda.to>
parents:
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108 case '-': |
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Thinker K.F. Li <thinker@branda.to>
parents:
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109 if(!valid_num) { |
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3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
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110 factor *= -1; |
|
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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111 valid_num = 1; |
|
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
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112 break; |
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parents:
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113 } |
| 88 | 114 case '+': |
| 115 case '*': | |
| 116 case '/': | |
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92
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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117 saved = real_compute(op, saved, num * factor); |
|
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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118 buf[0] = tgt_list[i].c; |
| 94 | 119 show_text(calc_data, saved, saved, 'n', buf); |
| 90 | 120 op = tgt_list[i].c; |
| 88 | 121 num = 0; |
|
92
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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122 factor = 1; |
|
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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123 valid_num = 0; |
| 88 | 124 break; |
| 125 | |
| 126 case '=': | |
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92
3f619ae03678
Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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127 saved = real_compute(op, saved, num * factor); |
| 94 | 128 show_text(calc_data, saved, 0, 'n', ""); |
| 88 | 129 num = 0; |
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92
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Improve calcuator example program.
Thinker K.F. Li <thinker@branda.to>
parents:
90
diff
changeset
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130 op = 'N'; |
| 88 | 131 break; |
| 132 } | |
| 133 } | |
| 94 | 134 rdman_redraw_changed(calc_data->rt->rdman); |
| 88 | 135 } |
| 136 | |
| 137 static void buttons_handler(event_t *evt, void *arg) { | |
| 94 | 138 calc_data_t *calc_data = (calc_data_t *)arg; |
| 88 | 139 |
| 140 switch(evt->type) { | |
| 141 case EVT_MOUSE_BUT_PRESS: | |
| 94 | 142 compute(calc_data, (coord_t *)evt->cur_tgt); |
| 88 | 143 break; |
| 144 } | |
| 145 } | |
| 146 | |
| 94 | 147 static void setup_observers(calc_data_t *calc_data) { |
| 88 | 148 calculator_scr_t *calculator_scr; |
| 149 ob_factory_t *factory; | |
| 150 subject_t *subject; | |
| 90 | 151 coord_t *coord; |
| 152 int off; | |
| 153 int i; | |
| 88 | 154 |
| 94 | 155 calculator_scr = calc_data->code; |
| 156 factory = rdman_get_ob_factory(calc_data->rt->rdman); | |
| 88 | 157 |
| 90 | 158 for(i = 0; i < 16; i++) { |
| 159 off = tgt_list[i].off; | |
| 93 | 160 coord = OFF2TYPE(calculator_scr, off, coord_t *); |
| 90 | 161 subject = coord_get_mouse_event(coord); |
| 94 | 162 subject_add_observer(factory, subject, buttons_handler, calc_data); |
| 90 | 163 } |
| 88 | 164 } |
| 165 | |
| 166 int main(int argc, char * const argv[]) { | |
| 167 X_MB_runtime_t rt; | |
| 168 calculator_scr_t *calculator_scr; | |
| 94 | 169 calc_data_t calc_data; |
| 88 | 170 int r; |
| 171 | |
| 172 r = X_MB_init(":0.0", 300, 400, &rt); | |
| 173 | |
| 174 calculator_scr = calculator_scr_new(rt.rdman); | |
| 175 | |
| 94 | 176 calc_data.rt = &rt; |
| 177 calc_data.code = calculator_scr; | |
| 178 setup_observers(&calc_data); | |
| 88 | 179 |
| 180 X_MB_handle_connection(&rt); | |
| 181 | |
| 182 calculator_scr_free(calculator_scr); | |
| 183 X_MB_destroy(&rt); | |
| 184 | |
| 185 return 0; | |
| 186 } |