apps/zde/zcalc/main.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <appcl.h>
  21
  22 int result;
  23 int pos;
  24 int mem;
  25 char op;
  26
  27 void zcalc_draw ()
  28 {
  29         zgui_puts (10, 10, "ZCalc", 0);
  30
  31         char res[32];
  32         sprintf (res, "= %d", result);
  33
  34         zgui_puts (10, 20, res, 0);
  35
  36         char btn[16];
  37
  38         btn[1] = zgui_button (10, 100, "1");
  39         btn[2] = zgui_button (35, 100, "2");
  40         btn[3] = zgui_button (60, 100, "3");
  41         btn[12] = zgui_button (85, 100, "*");
  42
  43         btn[4] = zgui_button (10, 75, "4");
  44         btn[5] = zgui_button (35, 75, "5");
  45         btn[6] = zgui_button (60, 75, "6");
  46         btn[13] = zgui_button (85, 75, "/");
  47
  48         btn[7] = zgui_button (10, 50, "7");
  49         btn[8] = zgui_button (35, 50, "8");
  50         btn[9] = zgui_button (60, 50, "9");
  51         btn[15] = zgui_button (85, 50, "C");
  52
  53         btn[0] = zgui_button (10, 125, "0");
  54         btn[10] = zgui_button (35, 125, "+");
  55         btn[11] = zgui_button (60, 125, "-");
  56         btn[14] = zgui_button (85, 125, "=");
  57
  58         int i;
  59         for (i = 0; i < 10; i ++)
  60                 if (!btn[i]) {
  61                         result *= pos;
  62                         result += i;
  63                         pos = 10;
  64                 }
  65
  66         /* C */
  67         if (!btn[15]) {
  68                 result = 0;
  69                 pos = 1;
  70                 mem = 0;
  71         }
  72
  73         /* + */
  74         if (!btn[10]) {
  75                 mem += result;
  76                 result = 0;
  77                 pos = 1;
  78                 op = '+';
  79         }
  80
  81         /* - */
  82         if (!btn[11]) {
  83                 if (mem)
  84                         mem -= result;
  85
  86                 result = 0;
  87                 pos = 1;
  88                 op = '-';
  89         }
  90
  91         /* * */
  92         if (!btn[12]) {
  93                 if (mem)
  94                         mem *= result;
  95
  96                 result = 0;
  97                 pos = 1;
  98                 op = '*';
  99         }
 100
 101         /* / */
 102         if (!btn[13]) {
 103                 if (mem)
 104                         mem /= result;
 105
 106                 result = 0;
 107                 pos = 1;
 108                 op = '/';
 109         }
 110
 111         /* = */
 112         if (!btn[14]) {
 113                 switch (op) {
 114                         case '+':
 115                                 mem += result;
 116                                 result = mem;
 117                                 break;
 118                         case '-':
 119                                 mem -= result;
 120                                 result = mem;
 121                                 break;
 122                         case '*':
 123                                 mem *= result;
 124                                 result = mem;
 125                                 break;
 126                         case '/':
 127                                 mem /= result;
 128                                 result = mem;
 129                                 break;
 130                 }
 131
 132                 mem = 0;
 133                 op = 0;
 134         }
 135 }
 136
 137 int main (int argc, char **argv)
 138 {
 139         int exit = 0;
 140
 141         result = 0;
 142         pos = 1;
 143         mem = 0;
 144         op = 0;
 145
 146         if (zgui_init () == -1)
 147                 return -1;
 148
 149         zgui_resize (120, 200);
 150
 151         while (!exit) {
 152                 unsigned state = zgui_event ();
 153
 154                 if (state & APPCL_STATE_REDRAW)
 155                         zcalc_draw ();
 156
 157                 if (state & APPCL_STATE_EXIT)
 158                         exit = 1;
 159         }
 160
 161         return zgui_exit ();
 162 }
 163