Immediate-Mode-UI.Nuklear/demo/gdi/main.c

/* nuklear - 1.32.0 - public domain */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <limits.h>

#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 600

#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_STANDARD_IO
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_IMPLEMENTATION
#define NK_GDI_IMPLEMENTATION
#include "../../nuklear.h"
#include "nuklear_gdi.h"

/* ===============================================================
 *
 *                          EXAMPLE
 *
 * ===============================================================*/
/* This are some code examples to provide a small overview of what can be
 * done with this library. To try out an example uncomment the defines */
/*#define INCLUDE_ALL */
/*#define INCLUDE_STYLE */
/*#define INCLUDE_CALCULATOR */
/*#define INCLUDE_CANVAS */
/*#define INCLUDE_OVERVIEW */
/*#define INCLUDE_NODE_EDITOR */

#ifdef INCLUDE_ALL
  #define INCLUDE_STYLE
  #define INCLUDE_CALCULATOR
  #define INCLUDE_CANVAS
  #define INCLUDE_OVERVIEW
  #define INCLUDE_NODE_EDITOR
#endif

#ifdef INCLUDE_STYLE
  #include "../../demo/common/style.c"
#endif
#ifdef INCLUDE_CALCULATOR
  #include "../../demo/common/calculator.c"
#endif
#ifdef INCLUDE_CANVAS
  #include "../../demo/common/canvas.c"
#endif
#ifdef INCLUDE_OVERVIEW
  #include "../../demo/common/overview.c"
#endif
#ifdef INCLUDE_NODE_EDITOR
  #include "../../demo/common/node_editor.c"
#endif

/* ===============================================================
 *
 *                          DEMO
 *
 * ===============================================================*/
static LRESULT CALLBACK
WindowProc(HWND wnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
    switch (msg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }

    if (nk_gdi_handle_event(wnd, msg, wparam, lparam))
        return 0;

    return DefWindowProcW(wnd, msg, wparam, lparam);
}

int main(void)
{
    GdiFont* font;
    struct nk_context *ctx;

    WNDCLASSW wc;
    ATOM atom;
    RECT rect = { 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT };
    DWORD style = WS_OVERLAPPEDWINDOW;
    DWORD exstyle = WS_EX_APPWINDOW;
    HWND wnd;
    HDC dc;
    int running = 1;
    int needs_refresh = 1;

    /* Win32 */
    memset(&wc, 0, sizeof(wc));
    wc.style = CS_DBLCLKS;
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = GetModuleHandleW(0);
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszClassName = L"NuklearWindowClass";
    atom = RegisterClassW(&wc);

    AdjustWindowRectEx(&rect, style, FALSE, exstyle);
    wnd = CreateWindowExW(exstyle, wc.lpszClassName, L"Nuklear GDI Demo",
        style | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT,
        rect.right - rect.left, rect.bottom - rect.top,
        NULL, NULL, wc.hInstance, NULL);
    dc = GetDC(wnd);

    /* GUI */
    font = nk_gdifont_create("Arial", 14);
    ctx = nk_gdi_init(font, dc, WINDOW_WIDTH, WINDOW_HEIGHT);

    /* style.c */
    #ifdef INCLUDE_STYLE
    /* ease regression testing during Nuklear release process; not needed for anything else */
    #ifdef STYLE_WHITE
    set_style(ctx, THEME_WHITE);
    #elif defined(STYLE_RED)
    set_style(ctx, THEME_RED);
    #elif defined(STYLE_BLUE)
    set_style(ctx, THEME_BLUE);
    #elif defined(STYLE_DARK)
    set_style(ctx, THEME_DARK);
    #endif
    #endif

    while (running)
    {
        /* Input */
        MSG msg;
        nk_input_begin(ctx);
        if (needs_refresh == 0) {
            if (GetMessageW(&msg, NULL, 0, 0) <= 0)
                running = 0;
            else {
                TranslateMessage(&msg);
                DispatchMessageW(&msg);
            }
            needs_refresh = 1;
        } else needs_refresh = 0;

        while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_QUIT)
                running = 0;
            TranslateMessage(&msg);
            DispatchMessageW(&msg);
            needs_refresh = 1;
        }
        nk_input_end(ctx);

        /* GUI */
        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))
        {
            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, 22, 1);
            nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
        }
        nk_end(ctx);

        /* -------------- EXAMPLES ---------------- */
        #ifdef INCLUDE_CALCULATOR
          calculator(ctx);
        #endif
        #ifdef INCLUDE_CANVAS
          canvas(ctx);
        #endif
        #ifdef INCLUDE_OVERVIEW
          overview(ctx);
        #endif
        #ifdef INCLUDE_NODE_EDITOR
          node_editor(ctx);
        #endif
        /* ----------------------------------------- */

        /* Draw */
        nk_gdi_render(nk_rgb(30,30,30));
    }

    nk_gdifont_del(font);
    ReleaseDC(wnd, dc);
    UnregisterClassW(wc.lpszClassName, wc.hInstance);
    return 0;
}