#define NK_IMPLEMENTATION
#define NK_INCLUDE_DEFAULT_FONT
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_FONT_BAKING
#include "nuklear.h"
#include <stdio.h>

static float font_width_calc(nk_handle handle, float height, const char *text, int len) {
    (void)handle;
    (void)height;
    return (float)len * 8.0f;
}

int main(void) {
    enum { EASY, HARD };
    static int op = EASY;
    static float value = 0.6f;
    static int i = 20;
    struct nk_context ctx;
    struct nk_user_font font;
    struct nk_font_atlas atlas;

    font.userdata = (nk_handle)0;
    font.height = 13.0f;
    font.width = font_width_calc;

    nk_init_default(&ctx, &font);
    nk_font_atlas_init_default(&atlas);
    nk_font_atlas_begin(&atlas);
    nk_font_atlas_add_default(&atlas, 13.0f, 0);
    int w, h;
    const void *img = nk_font_atlas_bake(&atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
    (void)img;
    nk_font_atlas_end(&atlas, nk_handle_id(0), NULL);

    ctx.style.font = &font;

    if (nk_begin(&ctx, "Show", nk_rect(50, 50, 220, 220),
                 NK_WINDOW_BORDER | NK_WINDOW_MOVABLE | NK_WINDOW_CLOSABLE)) {
        nk_layout_row_static(&ctx, 30, 80, 1);
        if (nk_button_label(&ctx, "button")) {
        }

        nk_layout_row_dynamic(&ctx, 30, 2);
        if (nk_option_label(&ctx, "easy", op == EASY))
            op = EASY;
        if (nk_option_label(&ctx, "hard", op == HARD))
            op = HARD;

        nk_layout_row_begin(&ctx, NK_STATIC, 30, 2);
        {
            nk_layout_row_push(&ctx, 50);
            nk_label(&ctx, "Volume:", NK_TEXT_LEFT);
            nk_layout_row_push(&ctx, 110);
            nk_slider_float(&ctx, 0, &value, 1.0f, 0.1f);
        }
        nk_layout_row_end(&ctx);
    }
    nk_end(&ctx);

    nk_font_atlas_cleanup(&atlas);
    nk_free(&ctx);
    return 0;
}