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e3b0f24626
Nuklear/demo/sdl_renderer/main.c
paccer e3b0f24626 Fix missed grab state changes in SDL demos 
Move grab handling out of `nk_sdl_handle_event` to `nk_sdl_handle_grab`,
which is now called outside of the event loop.
This change makes the logic similar to the GLFW demos and fixes issues
with missed grab state changes and mouse cursor disappearing.
2024-02-10 03:03:16 +01:00

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/* nuklear - 1.32.0 - public domain */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <limits.h>
#include <time.h>
#include <SDL2/SDL.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
#define NK_SDL_RENDERER_IMPLEMENTATION
#include "../../nuklear.h"
#include "nuklear_sdl_renderer.h"
#define WINDOW_WIDTH 1200
#define WINDOW_HEIGHT 800
/* ===============================================================
*
* 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_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
*
* ===============================================================*/
int
main(int argc, char *argv[])
{
/* Platform */
SDL_Window *win;
SDL_Renderer *renderer;
int running = 1;
int flags = 0;
float font_scale = 1;
/* GUI */
struct nk_context *ctx;
struct nk_colorf bg;
/* SDL setup */
SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
SDL_Init(SDL_INIT_VIDEO);
win = SDL_CreateWindow("Demo",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
if (win == NULL) {
SDL_Log("Error SDL_CreateWindow %s", SDL_GetError());
exit(-1);
}
flags |= SDL_RENDERER_ACCELERATED;
flags |= SDL_RENDERER_PRESENTVSYNC;
#if 0
SDL_SetHint(SDL_HINT_RENDER_BATCHING, "1");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengl");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengles2");
#endif
renderer = SDL_CreateRenderer(win, -1, flags);
if (renderer == NULL) {
SDL_Log("Error SDL_CreateRenderer %s", SDL_GetError());
exit(-1);
}
/* scale the renderer output for High-DPI displays */
{
int render_w, render_h;
int window_w, window_h;
float scale_x, scale_y;
SDL_GetRendererOutputSize(renderer, &render_w, &render_h);
SDL_GetWindowSize(win, &window_w, &window_h);
scale_x = (float)(render_w) / (float)(window_w);
scale_y = (float)(render_h) / (float)(window_h);
SDL_RenderSetScale(renderer, scale_x, scale_y);
font_scale = scale_y;
}
/* GUI */
ctx = nk_sdl_init(win, renderer);
/* Load Fonts: if none of these are loaded a default font will be used */
/* Load Cursor: if you uncomment cursor loading please hide the cursor */
{
struct nk_font_atlas *atlas;
struct nk_font_config config = nk_font_config(0);
struct nk_font *font;
/* set up the font atlas and add desired font; note that font sizes are
* multiplied by font_scale to produce better results at higher DPIs */
nk_sdl_font_stash_begin(&atlas);
font = nk_font_atlas_add_default(atlas, 13 * font_scale, &config);
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 16 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13 * font_scale, &config);*/
nk_sdl_font_stash_end();
/* this hack makes the font appear to be scaled down to the desired
* size and is only necessary when font_scale > 1 */
font->handle.height /= font_scale;
/*nk_style_load_all_cursors(ctx, atlas->cursors);*/
nk_style_set_font(ctx, &font->handle);
}
#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
bg.r = 0.10f, bg.g = 0.18f, bg.b = 0.24f, bg.a = 1.0f;
while (running)
{
/* Input */
SDL_Event evt;
nk_input_begin(ctx);
while (SDL_PollEvent(&evt)) {
if (evt.type == SDL_QUIT) goto cleanup;
nk_sdl_handle_event(&evt);
}
nk_sdl_handle_grab(); /* optional grabbing behavior */
nk_input_end(ctx);
/* GUI */
if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 250),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
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, 25, 1);
nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
nk_layout_row_dynamic(ctx, 20, 1);
nk_label(ctx, "background:", NK_TEXT_LEFT);
nk_layout_row_dynamic(ctx, 25, 1);
if (nk_combo_begin_color(ctx, nk_rgb_cf(bg), nk_vec2(nk_widget_width(ctx),400))) {
nk_layout_row_dynamic(ctx, 120, 1);
bg = nk_color_picker(ctx, bg, NK_RGBA);
nk_layout_row_dynamic(ctx, 25, 1);
bg.r = nk_propertyf(ctx, "#R:", 0, bg.r, 1.0f, 0.01f,0.005f);
bg.g = nk_propertyf(ctx, "#G:", 0, bg.g, 1.0f, 0.01f,0.005f);
bg.b = nk_propertyf(ctx, "#B:", 0, bg.b, 1.0f, 0.01f,0.005f);
bg.a = nk_propertyf(ctx, "#A:", 0, bg.a, 1.0f, 0.01f,0.005f);
nk_combo_end(ctx);
}
}
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
/* ----------------------------------------- */
SDL_SetRenderDrawColor(renderer, bg.r * 255, bg.g * 255, bg.b * 255, bg.a * 255);
SDL_RenderClear(renderer);
nk_sdl_render(NK_ANTI_ALIASING_ON);
SDL_RenderPresent(renderer);
}
cleanup:
nk_sdl_shutdown();
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(win);
SDL_Quit();
return 0;
}
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