Mercurial > MadButterfly
annotate examples/calculator/main.c @ 192:54fdc2a65242
Remove factory from observer APIs.
- Save factory that used to new a subject as subject's attribute.
- Get factory from subject himself instead of passing as an argument.
- It make API of observer more simple and clean.
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Tue, 18 Nov 2008 21:42:30 +0800 |
| parents | 530bb7728546 |
| children | c990a9a9648f a90fd749af82 |
| rev | line source |
|---|---|
| 88 | 1 #include <stdio.h> |
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2 #include <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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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; |
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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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52 r = v2; |
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53 break; |
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54 case 'N': |
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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]; |
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64 redraw_man_t *rdman; |
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65 |
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66 rdman = X_MB_rdman(calc_data->rt); |
| 88 | 67 |
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68 sprintf(buf, "%d%s", num, suffix); |
| 94 | 69 sh_text_set_text(calc_data->code->screen_text, buf); |
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70 rdman_shape_changed(rdman, calc_data->code->screen_text); |
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71 |
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72 if(op == 'n') |
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73 sprintf(buf, "None"); |
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74 else |
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75 sprintf(buf, "%d%c", saved, op); |
| 94 | 76 sh_text_set_text(calc_data->code->saved_text, buf); |
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77 rdman_shape_changed(rdman, calc_data->code->saved_text); |
| 88 | 78 } |
| 79 | |
| 94 | 80 static void compute(calc_data_t *calc_data, coord_t *tgt) { |
| 88 | 81 int i; |
| 82 coord_t **coord_p; | |
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83 redraw_man_t *rdman; |
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84 static int valid_num = 0; |
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85 static int factor = 1; |
| 88 | 86 static int num = 0; |
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87 static int op = 'n'; |
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88 static int saved = 0; |
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89 char buf[2] = " "; |
| 88 | 90 |
| 91 for(i = 0; i < 16; i++) { | |
| 94 | 92 coord_p = (coord_t **)((void *)calc_data->code + tgt_list[i].off); |
| 88 | 93 if(*coord_p == (void *)tgt) |
| 94 break; | |
| 95 } | |
| 96 if(i >= 16) return; | |
| 97 | |
| 98 if(i < 10) { | |
| 99 num = num * 10 + i; | |
| 94 | 100 show_text(calc_data, num * factor, saved, op, ""); |
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101 valid_num = 1; |
| 88 | 102 } else { |
| 103 switch(tgt_list[i].c) { | |
| 104 case 'c': | |
| 105 saved = num = 0; | |
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106 factor = 1; |
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107 valid_num = 0; |
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108 op = 'n'; |
| 94 | 109 show_text(calc_data, 0, saved, op, ""); |
| 88 | 110 break; |
| 111 | |
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112 case '-': |
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113 if(!valid_num) { |
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114 factor *= -1; |
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115 valid_num = 1; |
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116 break; |
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117 } |
| 88 | 118 case '+': |
| 119 case '*': | |
| 120 case '/': | |
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121 saved = real_compute(op, saved, num * factor); |
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122 buf[0] = tgt_list[i].c; |
| 94 | 123 show_text(calc_data, saved, saved, 'n', buf); |
| 90 | 124 op = tgt_list[i].c; |
| 88 | 125 num = 0; |
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126 factor = 1; |
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127 valid_num = 0; |
| 88 | 128 break; |
| 129 | |
| 130 case '=': | |
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131 saved = real_compute(op, saved, num * factor); |
| 94 | 132 show_text(calc_data, saved, 0, 'n', ""); |
| 88 | 133 num = 0; |
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134 op = 'N'; |
| 88 | 135 break; |
| 136 } | |
| 137 } | |
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138 rdman = X_MB_rdman(calc_data->rt); |
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139 rdman_redraw_changed(rdman); |
| 88 | 140 } |
| 141 | |
| 142 static void buttons_handler(event_t *evt, void *arg) { | |
| 94 | 143 calc_data_t *calc_data = (calc_data_t *)arg; |
| 88 | 144 |
| 145 switch(evt->type) { | |
| 146 case EVT_MOUSE_BUT_PRESS: | |
| 94 | 147 compute(calc_data, (coord_t *)evt->cur_tgt); |
| 88 | 148 break; |
| 149 } | |
| 150 } | |
| 151 | |
| 94 | 152 static void setup_observers(calc_data_t *calc_data) { |
| 88 | 153 calculator_scr_t *calculator_scr; |
| 154 subject_t *subject; | |
| 90 | 155 coord_t *coord; |
| 156 int off; | |
| 157 int i; | |
| 88 | 158 |
| 94 | 159 calculator_scr = calc_data->code; |
| 88 | 160 |
| 90 | 161 for(i = 0; i < 16; i++) { |
| 162 off = tgt_list[i].off; | |
| 93 | 163 coord = OFF2TYPE(calculator_scr, off, coord_t *); |
| 90 | 164 subject = coord_get_mouse_event(coord); |
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165 subject_add_observer(subject, buttons_handler, calc_data); |
| 90 | 166 } |
| 88 | 167 } |
| 168 | |
| 169 int main(int argc, char * const argv[]) { | |
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170 X_MB_runtime_t *rt; |
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171 redraw_man_t *rdman; |
| 88 | 172 calculator_scr_t *calculator_scr; |
| 94 | 173 calc_data_t calc_data; |
| 88 | 174 |
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175 rt = X_MB_new(":0.0", 300, 400); |
| 88 | 176 |
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177 rdman = X_MB_rdman(rt); |
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178 calculator_scr = calculator_scr_new(rdman, rdman->root_coord); |
| 88 | 179 |
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180 calc_data.rt = rt; |
| 94 | 181 calc_data.code = calculator_scr; |
| 182 setup_observers(&calc_data); | |
| 88 | 183 |
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184 X_MB_handle_connection(rt); |
| 88 | 185 |
| 186 calculator_scr_free(calculator_scr); | |
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187 X_MB_free(rt); |
| 88 | 188 |
| 189 return 0; | |
| 190 } |