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