c/glade-examples/delete/calc/test.c

   1 /*
   2 First run tutorial.glade through gtk-builder-convert with this command:
   3   gtk-builder-convert tutorial.glade tutorial.xml
   4
   5 Then save this file as main.c and compile it using this command
   6 (those are backticks, not single quotes):
   7   gcc -Wall -g -o tutorial main.c `pkg-config --cflags --libs gtk+-2.0` -export-dynamic
   8
   9 Then execute it using:
  10   ./tutorial
  11 */
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <math.h>
  17 #include <gtk/gtk.h>
  18
  19 GtkBuilder      *builder;
  20 GtkWidget       *window, *entry_a, *entry_b, *entry_calc, *entry_mem, *label_op;
  21 char            tempbuf[128], *ptempchar, nextop;
  22 int             calculated;
  23
  24 void on_button_no_clicked(GtkWidget *widget, gpointer user_data) {
  25         gtk_entry_append_text(entry_calc, gtk_button_get_label(widget));
  26 }
  27
  28 void calculate() {
  29         double a, b, e;
  30         if(calculated) return;
  31         gtk_entry_set_text(entry_b, gtk_entry_get_text(entry_calc));
  32         gtk_entry_set_text(entry_calc, "");
  33
  34         a = strtod(gtk_entry_get_text(entry_a), NULL);
  35         b = strtod(gtk_entry_get_text(entry_b), NULL);
  36
  37         switch(nextop) {
  38                 case '+': e = a + b; break;
  39                 case '-': e = a - b; break;
  40                 case '*': e = a * b; break;
  41                 case '/': e = a / b; break;
  42                 case '^': e = pow(a,  b); break;
  43                 case 'S': e = a + b; break;
  44         }
  45         sprintf(tempbuf, "%lf", e);
  46         //printf("%f %c %f = %f\n", a, nextop, b, e);
  47         gtk_entry_set_text(entry_calc, tempbuf);
  48         calculated = 1;
  49 }
  50
  51 void on_button_op_clicked(GtkWidget *widget, gpointer user_data) {
  52         char *oplbl = gtk_button_get_label(widget);
  53
  54         switch(oplbl[0]) {
  55                 case '+': case '-': case '*': case '/': case '^': case 'S':
  56                         if(!calculated) calculate();
  57                         gtk_entry_set_text(entry_a, gtk_entry_get_text(entry_calc));
  58                         gtk_entry_set_text(entry_calc, "");
  59                         gtk_entry_set_text(entry_b, "");
  60                         gtk_label_set_label(label_op, oplbl);
  61                         nextop = oplbl[0];
  62                         calculated = 0;
  63                 break;
  64
  65                 case '=':
  66                         if(!calculated) calculate();
  67                         gtk_entry_set_text(entry_calc, gtk_entry_get_text(entry_calc));
  68                         calculated = 1;
  69                 break;
  70         }
  71 }
  72
  73 void on_button_mem_clicked(GtkWidget *widget, gpointer user_data) {
  74         char *oplbl = gtk_button_get_label(widget);
  75         double e = 0, m = 0;
  76         e = strtod(gtk_entry_get_text(entry_calc), NULL);
  77         m = strtod(gtk_entry_get_text(entry_mem), NULL);
  78         switch(oplbl[0]) {
  79                 case '+': m += e; break;
  80                 case '-': m -= e; break;
  81                 case 'C': m = 0; break;
  82         }
  83         sprintf(tempbuf, "%lf", m);
  84         gtk_entry_set_text(entry_mem, tempbuf);
  85
  86 }
  87
  88 void on_button_clear_clicked() {
  89         /*ptempchar = gtk_entry_get_text(entry_calc);
  90         ptempchar[strlen(ptempchar)-1] = '\x00';
  91         gtk_entry_set_text(entry_calc, ptempchar);*/
  92         gtk_entry_append_text(entry_calc, "\r");
  93 }
  94
  95 void reset() {
  96         calculated = 1;
  97         gtk_label_set_label(label_op, "?");
  98         gtk_entry_set_text(entry_calc, "");
  99         gtk_entry_set_text(entry_a, "");
 100         gtk_entry_set_text(entry_b, "");
 101 }
 102
 103 void on_window_destroy (GtkObject *object, gpointer user_data)
 104 {
 105     gtk_main_quit ();
 106 }
 107
 108 int main (int argc, char *argv[])
 109 {
 110         gtk_init (&argc, &argv);
 111
 112         builder = gtk_builder_new ();
 113         gtk_builder_add_from_file (builder, "calc.xml", NULL);
 114         window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
 115
 116         entry_a = GTK_WIDGET (gtk_builder_get_object (builder, "entry_a"));
 117         entry_b = GTK_WIDGET (gtk_builder_get_object (builder, "entry_b"));
 118         entry_calc = GTK_WIDGET (gtk_builder_get_object (builder, "entry_calc"));
 119         entry_mem = GTK_WIDGET (gtk_builder_get_object (builder, "entry_mem"));
 120         label_op = GTK_WIDGET (gtk_builder_get_object (builder, "label_op"));
 121
 122         gtk_builder_connect_signals (builder, NULL);
 123         g_object_unref (G_OBJECT (builder));
 124
 125         reset();
 126         gtk_widget_show (window);
 127         gtk_main ();
 128
 129         return 0;
 130 }
 131