swk

static widget kit
git clone git://git.suckless.org/swk
Log | Files | Refs | README | LICENSE

calc.c (1704B)

      1 #include <stdio.h>
      2 #include <string.h>
      3 #include <swk.h>
      4 
      5 static int bufferi = 0;
      6 static char buffer[256];
      7 
      8 static void button(SwkEvent *e) {
      9 	FILE *pd;
     10 	static char buffer2[sizeof(buffer)+32];
     11 	if(e->type==EClick) {
     12 		int key = *e->box->text;
     13 		switch(key) {
     14 		case 'C':
     15 			bufferi = buffer[0] = 0;
     16 			break;
     17 		case '<':
     18 			if(bufferi>0)
     19 				buffer[--bufferi] = 0;
     20 			break;
     21 		case '=':
     22 			snprintf(buffer2, sizeof(buffer2), "echo '%s' | bc -q", buffer);
     23 			pd = popen(buffer2, "r");
     24 			if(pd) {
     25 				fgets(buffer, sizeof(buffer), pd);
     26 				bufferi = strlen(buffer)-1;
     27 				buffer[bufferi] = 0;
     28 				pclose(pd);
     29 			}
     30 			break;
     31 		default:
     32 			if(bufferi<sizeof(buffer)) {
     33 				buffer[bufferi++] = key;
     34 				buffer[bufferi] = 0;
     35 			}
     36 			break;
     37 		}
     38 	}
     39 	return swk_bigbutton(e);
     40 }
     41 
     42 static SwkBox contents[] = {
     43 	SWK_BOX_NEWLINE(1),
     44 	{ .cb=swk_label, .text=buffer },
     45 	{ .cb=button, .text="<" },
     46 	SWK_BOX_NEWLINE(2),
     47 	{ .cb=button, .text="1" },
     48 	{ .cb=button, .text="2" },
     49 	{ .cb=button, .text="3" },
     50 	{ .cb=button, .text="C" },
     51 	SWK_BOX_NEWLINE(1),
     52 	{ .cb=button, .text="4" },
     53 	{ .cb=button, .text="5" },
     54 	{ .cb=button, .text="6" },
     55 	{ .cb=button, .text="+" },
     56 	SWK_BOX_NEWLINE(1),
     57 	{ .cb=button, .text="7" },
     58 	{ .cb=button, .text="8" },
     59 	{ .cb=button, .text="9" },
     60 	{ .cb=button, .text="-" },
     61 	SWK_BOX_NEWLINE(1),
     62 	{ .cb=button, .text="%" },
     63 	{ .cb=button, .text="0" },
     64 	{ .cb=button, .text="/" },
     65 	{ .cb=button, .text="*" },
     66 	SWK_BOX_NEWLINE(1),
     67 	{ .cb=swk_separator },
     68 	{ .cb=button, .text="." },
     69 	{ .cb=button, .text="=" },
     70 	{ .cb=NULL }
     71 };
     72 
     73 int main() {
     74 	SwkWindow w = {
     75 		.title="Calculator",
     76 		.boxes={contents,NULL},
     77 		.box=contents,
     78 	};
     79 	if(!swk_use(&w))
     80 		return 1;
     81 	*buffer = 0;
     82 	swk_loop();
     83 	return 0;
     84 }