nuklear-sapp.c

nuklear-sapp.c

//------------------------------------------------------------------------------
//  nuklear-sapp.c
//
//  Demonstrates Nuklear UI rendering in C via
//  sokol_gfx.h + sokol_nuklear.h + nuklear.h
//------------------------------------------------------------------------------
#define SOKOL_METAL
#include "sokol_app.h"
#include "sokol_gfx.h"
#include "sokol_time.h"
#include "sokol_glue.h"
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_STANDARD_IO
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_IMPLEMENTATION
#include "nuklear.h"
#define SOKOL_NUKLEAR_IMPL
#include "sokol_nuklear.h"

void init(void) {
    // setup sokol-gfx, sokol-time and sokol-imgui
    sg_setup(&(sg_desc){
        .context = sapp_sgcontext()
    });
    stm_setup();

    // use sokol-nuklear with all default-options (we're not doing
    // multi-sampled rendering or using non-default pixel formats)
    snuklear_setup(&(snuklear_desc_t){
        .dpi_scale = sapp_dpi_scale()
    });
}

void frame(void) {
    struct nk_context *ctx = snuklear_new_frame();

    // Show a basic Nuklear Window
    if (nk_begin(ctx, "Demo", nk_rect(50, 50, 200, 200),
        NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
        NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
    {
        nk_menubar_begin(ctx);
        nk_layout_row_begin(ctx, NK_STATIC, 25, 2);
        nk_layout_row_push(ctx, 45);
        if (nk_menu_begin_label(ctx, "FILE", NK_TEXT_LEFT, nk_vec2(120, 200))) {
            nk_layout_row_dynamic(ctx, 30, 1);
            nk_menu_item_label(ctx, "OPEN", NK_TEXT_LEFT);
            nk_menu_item_label(ctx, "CLOSE", NK_TEXT_LEFT);
            nk_menu_end(ctx);
        }
        nk_layout_row_push(ctx, 45);
        if (nk_menu_begin_label(ctx, "EDIT", NK_TEXT_LEFT, nk_vec2(120, 200))) {
            nk_layout_row_dynamic(ctx, 30, 1);
            nk_menu_item_label(ctx, "COPY", NK_TEXT_LEFT);
            nk_menu_item_label(ctx, "CUT", NK_TEXT_LEFT);
            nk_menu_item_label(ctx, "PASTE", NK_TEXT_LEFT);
            nk_menu_end(ctx);
        }
        nk_layout_row_end(ctx);
        nk_menubar_end(ctx);

        enum {EASY, HARD};
        static int op = EASY;
        static int property = 20;
        nk_layout_row_static(ctx, 30, 80, 1);
        if (nk_button_label(ctx, "button"))
            fprintf(stdout, "button pressed\n");
        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_dynamic(ctx, 25, 1);
        nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
    }
    nk_end(ctx);

    // the sokol_gfx draw pass
    sg_begin_default_pass(&(sg_pass_action){
        .colors[0] = {
            .action = SG_ACTION_CLEAR, .val = { 0.7f, 0.5f, 0.0f, 1.0f }
        }
    }, sapp_width(), sapp_height());
    snuklear_render(sapp_width(), sapp_height());
    sg_end_pass();
    sg_commit();
}

void cleanup(void) {
    snuklear_shutdown();
    sg_shutdown();
}

void input(const sapp_event* event) {
    snuklear_handle_event(event);
}

sapp_desc sokol_main(int argc, char* argv[]) {
    (void)argc;
    (void)argv;
    return (sapp_desc) {
        .init_cb = init,
        .frame_cb = frame,
        .cleanup_cb = cleanup,
        .event_cb = input,
        .high_dpi = true,
        .enable_clipboard = true,
        .width = 1024,
        .height = 768,
        .window_title = "nuklear (sokol-app)",
        .ios_keyboard_resizes_canvas = true
    };
}