Mercurial > MadButterfly

annotate examples/calculator/main.c @ 92:3f619ae03678

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Improve calcuator example program.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 24 Aug 2008 00:18:59 +0800
parents bd29780bf266
children c3c41f88e776
rev   line source
88
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
1 #include <stdio.h>
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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2 #include <mb_types.h>
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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3 #include <X_supp.h>
dd813dcc232c New example, calculator.
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4 #include <shapes.h>
dd813dcc232c New example, calculator.
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5 #include <tools.h>
dd813dcc232c New example, calculator.
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6 #include "calculator_scr.h"
dd813dcc232c New example, calculator.
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7
dd813dcc232c New example, calculator.
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8 typedef struct _ex_rt ex_rt_t;
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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9 struct _ex_rt {
dd813dcc232c New example, calculator.
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10 X_MB_runtime_t *rt;
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11 calculator_scr_t *code;
dd813dcc232c New example, calculator.
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12 };
dd813dcc232c New example, calculator.
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13
dd813dcc232c New example, calculator.
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14 static struct {
dd813dcc232c New example, calculator.
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15 int c;
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16 int off;
dd813dcc232c New example, calculator.
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17 } tgt_list[] = {
dd813dcc232c New example, calculator.
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18 { 0, OFFSET(calculator_scr_t, but_0) },
dd813dcc232c New example, calculator.
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19 { 1, OFFSET(calculator_scr_t, but_1) },
dd813dcc232c New example, calculator.
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20 { 2, OFFSET(calculator_scr_t, but_2) },
dd813dcc232c New example, calculator.
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21 { 3, OFFSET(calculator_scr_t, but_3) },
dd813dcc232c New example, calculator.
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22 { 4, OFFSET(calculator_scr_t, but_4) },
dd813dcc232c New example, calculator.
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23 { 5, OFFSET(calculator_scr_t, but_5) },
dd813dcc232c New example, calculator.
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24 { 6, OFFSET(calculator_scr_t, but_6) },
dd813dcc232c New example, calculator.
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25 { 7, OFFSET(calculator_scr_t, but_7) },
dd813dcc232c New example, calculator.
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26 { 8, OFFSET(calculator_scr_t, but_8) },
dd813dcc232c New example, calculator.
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27 { 9, OFFSET(calculator_scr_t, but_9) },
dd813dcc232c New example, calculator.
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28 { '+', OFFSET(calculator_scr_t, but_add) },
dd813dcc232c New example, calculator.
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29 { '-', OFFSET(calculator_scr_t, but_minus) },
dd813dcc232c New example, calculator.
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30 { '*', OFFSET(calculator_scr_t, but_mul) },
dd813dcc232c New example, calculator.
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31 { '/', OFFSET(calculator_scr_t, but_div) },
dd813dcc232c New example, calculator.
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32 { '=', OFFSET(calculator_scr_t, but_eq) },
dd813dcc232c New example, calculator.
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33 { 'c', OFFSET(calculator_scr_t, but_clr) }
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34 };
dd813dcc232c New example, calculator.
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35
dd813dcc232c New example, calculator.
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36 static int real_compute(int op, int v1, int v2) {
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3f619ae03678 Improve calcuator example program.
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37 int r = v1;
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dd813dcc232c New example, calculator.
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38
dd813dcc232c New example, calculator.
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39 switch(op) {
dd813dcc232c New example, calculator.
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40 case '+':
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41 r = v1 + v2;
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42 break;
dd813dcc232c New example, calculator.
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43 case '-':
dd813dcc232c New example, calculator.
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44 r = v1 - v2;
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45 break;
dd813dcc232c New example, calculator.
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46 case '*':
dd813dcc232c New example, calculator.
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47 r = v1 * v2;
dd813dcc232c New example, calculator.
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48 break;
dd813dcc232c New example, calculator.
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49 case '/':
89
90428161fc61 Prevent divide by zero error
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50 if(v2)
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51 r = v1 / v2;
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52 else
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53 r = v1;
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dd813dcc232c New example, calculator.
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54 break;
92
3f619ae03678 Improve calcuator example program.
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55 case 'n':
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56 r = v2;
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57 break;
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58 case 'N':
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59 break;
88
dd813dcc232c New example, calculator.
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60 }
dd813dcc232c New example, calculator.
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61
dd813dcc232c New example, calculator.
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62 return r;
dd813dcc232c New example, calculator.
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63 }
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64
92
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65 static void show_text(ex_rt_t *ex_rt, int num, int saved, int op,
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66 const char *suffix) {
88
dd813dcc232c New example, calculator.
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67 char buf[20];
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68
92
3f619ae03678 Improve calcuator example program.
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69 sprintf(buf, "%d%s", num, suffix);
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dd813dcc232c New example, calculator.
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70 sh_text_set_text(ex_rt->code->screen_text, buf);
dd813dcc232c New example, calculator.
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71 rdman_shape_changed(ex_rt->rt->rdman, ex_rt->code->screen_text);
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3f619ae03678 Improve calcuator example program.
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72
3f619ae03678 Improve calcuator example program.
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73 if(op == 'n')
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74 sprintf(buf, "None");
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75 else
3f619ae03678 Improve calcuator example program.
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76 sprintf(buf, "%d%c", saved, op);
3f619ae03678 Improve calcuator example program.
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77 sh_text_set_text(ex_rt->code->saved_text, buf);
3f619ae03678 Improve calcuator example program.
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78 rdman_shape_changed(ex_rt->rt->rdman, ex_rt->code->saved_text);
88
dd813dcc232c New example, calculator.
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79 }
dd813dcc232c New example, calculator.
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80
dd813dcc232c New example, calculator.
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81 static void compute(ex_rt_t *ex_rt, coord_t *tgt) {
dd813dcc232c New example, calculator.
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82 int i;
dd813dcc232c New example, calculator.
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83 coord_t **coord_p;
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3f619ae03678 Improve calcuator example program.
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84 static int valid_num = 0;
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85 static int factor = 1;
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dd813dcc232c New example, calculator.
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86 static int num = 0;
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87 static int op = 'n';
3f619ae03678 Improve calcuator example program.
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88 static int saved = 0;
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89 char buf[2] = " ";
88
dd813dcc232c New example, calculator.
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90
dd813dcc232c New example, calculator.
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91 for(i = 0; i < 16; i++) {
dd813dcc232c New example, calculator.
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92 coord_p = (coord_t **)((void *)ex_rt->code + tgt_list[i].off);
dd813dcc232c New example, calculator.
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93 if(*coord_p == (void *)tgt)
dd813dcc232c New example, calculator.
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94 break;
dd813dcc232c New example, calculator.
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95 }
dd813dcc232c New example, calculator.
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96 if(i >= 16) return;
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97
dd813dcc232c New example, calculator.
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98 if(i < 10) {
dd813dcc232c New example, calculator.
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99 num = num * 10 + i;
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3f619ae03678 Improve calcuator example program.
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100 show_text(ex_rt, num * factor, saved, op, "");
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101 valid_num = 1;
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dd813dcc232c New example, calculator.
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102 } else {
dd813dcc232c New example, calculator.
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103 switch(tgt_list[i].c) {
dd813dcc232c New example, calculator.
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104 case 'c':
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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';
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109 show_text(ex_rt, 0, saved, op, "");
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dd813dcc232c New example, calculator.
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110 break;
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111
92
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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
dd813dcc232c New example, calculator.
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118 case '+':
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119 case '*':
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120 case '/':
92
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121 saved = real_compute(op, saved, num * factor);
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122 buf[0] = tgt_list[i].c;
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123 show_text(ex_rt, saved, saved, 'n', buf);
90
bd29780bf266 Reduce redundant code
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124 op = tgt_list[i].c;
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125 num = 0;
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126 factor = 1;
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127 valid_num = 0;
88
dd813dcc232c New example, calculator.
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128 break;
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129
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130 case '=':
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131 saved = real_compute(op, saved, num * factor);
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132 show_text(ex_rt, saved, 0, 'n', "");
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133 num = 0;
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134 op = 'N';
88
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135 break;
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136 }
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137 }
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138 rdman_redraw_changed(ex_rt->rt->rdman);
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139 }
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140
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141 static void buttons_handler(event_t *evt, void *arg) {
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142 ex_rt_t *ex_rt = (ex_rt_t *)arg;
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143
dd813dcc232c New example, calculator.
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144 switch(evt->type) {
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145 case EVT_MOUSE_BUT_PRESS:
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146 compute(ex_rt, (coord_t *)evt->cur_tgt);
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147 break;
dd813dcc232c New example, calculator.
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148 }
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149 }
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150
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151 static void setup_observers(ex_rt_t *ex_rt) {
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152 calculator_scr_t *calculator_scr;
dd813dcc232c New example, calculator.
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153 ob_factory_t *factory;
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154 subject_t *subject;
90
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155 coord_t *coord;
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156 int off;
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157 int i;
88
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158
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159 calculator_scr = ex_rt->code;
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160 factory = rdman_get_ob_factory(ex_rt->rt->rdman);
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161
90
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162 for(i = 0; i < 16; i++) {
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163 off = tgt_list[i].off;
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164 coord = *(coord_t **)((void *)calculator_scr + off);
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165 subject = coord_get_mouse_event(coord);
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166 subject_add_observer(factory, subject, buttons_handler, ex_rt);
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167 }
88
dd813dcc232c New example, calculator.
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168 }
dd813dcc232c New example, calculator.
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169
dd813dcc232c New example, calculator.
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170 int main(int argc, char * const argv[]) {
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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171 X_MB_runtime_t rt;
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Thinker K.F. Li <thinker@branda.to>
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172 calculator_scr_t *calculator_scr;
dd813dcc232c New example, calculator.
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173 ex_rt_t ex_rt;
dd813dcc232c New example, calculator.
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174 int r;
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175
dd813dcc232c New example, calculator.
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176 r = X_MB_init(":0.0", 300, 400, &rt);
dd813dcc232c New example, calculator.
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177
dd813dcc232c New example, calculator.
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178 calculator_scr = calculator_scr_new(rt.rdman);
dd813dcc232c New example, calculator.
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179
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180 ex_rt.rt = &rt;
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181 ex_rt.code = calculator_scr;
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182 setup_observers(&ex_rt);
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183
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184 X_MB_handle_connection(&rt);
dd813dcc232c New example, calculator.
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185
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Thinker K.F. Li <thinker@branda.to>
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186 calculator_scr_free(calculator_scr);
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Thinker K.F. Li <thinker@branda.to>
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187 X_MB_destroy(&rt);
dd813dcc232c New example, calculator.
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188
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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189 return 0;
dd813dcc232c New example, calculator.
Thinker K.F. Li <thinker@branda.to>
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190 }