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#include <helianthus-nk.h></helianthus-nk.h>
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nk_heli hnk;
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struct nk_context *nk;
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void init() {
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nk_heli_init(&hnk, 12);
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nk = &hnk.context;
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}
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void deinit() {
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nk_heli_deinit(&hnk);
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}
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void draw() {
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if (nk_begin(nk, "Calculator", nk_rect(10, 10, 180, 250),
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NK_WINDOW_BORDER|NK_WINDOW_TITLE|NK_WINDOW_NO_SCROLLBAR|NK_WINDOW_MOVABLE))
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{
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static double a = 0, b = 0, c = 0, *cur = &a;
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static char sign = 0;
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nk_layout_row_dynamic(nk, 35, 1);
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char buffer[256];
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int len = snprintf(buffer, 256, "%g", *cur);
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nk_edit_string(nk, NK_EDIT_SIMPLE, buffer, &len, 255, nk_filter_float);
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nk_layout_row_dynamic(nk, 35, 4);
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int num = -1;
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if (nk_button_label(nk, "7")) num = 7;
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if (nk_button_label(nk, "8")) num = 8;
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if (nk_button_label(nk, "9")) num = 9;
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if (nk_button_label(nk, "+")) sign = '+';
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if (nk_button_label(nk, "4")) num = 4;
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if (nk_button_label(nk, "5")) num = 5;
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if (nk_button_label(nk, "6")) num = 6;
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if (nk_button_label(nk, "-")) sign = '-';
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if (nk_button_label(nk, "1")) num = 1;
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if (nk_button_label(nk, "2")) num = 2;
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if (nk_button_label(nk, "3")) num = 3;
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if (nk_button_label(nk, "*")) sign = '*';
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if (nk_button_label(nk, "ะก")) num = -2;
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if (nk_button_label(nk, "0")) num = 5;
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if (nk_button_label(nk, "=")) num = -3;
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if (nk_button_label(nk, "/")) sign = '/';
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if (sign) cur = &b;
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// new digit
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if (num >= 0) {
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if (cur != &b) cur = &a;
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*cur = *cur*10 + num;
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}
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// reset
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if (num == -2) {
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cur = &a;
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a = b = c = sign = 0;
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}
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// solve
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if (num == -3 && cur == &b) {
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if (sign == '+') c = a + b;
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if (sign == '-') c = a - b;
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if (sign == '*') c = a * b;
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if (sign == '/') c = a / b;
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cur = &c;
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a = b = sign = 0;
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}
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}
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nk_end(nk);
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nk_heli_process(&hnk);
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}
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int main() {
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windowSetResizable(TRUE);
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windowSetVariableFrameRate();
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windowSetInit(&init);
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windowSetDeinit(&deinit);
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windowSetDraw(&draw);
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windowRun();
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return 0;
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}
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