smgui/examples/multiwin.c

/*
 * src/multiwin.c
 * https://gitlab.com/bztsrc/smgui
 *
 * Copyright (C) 2024 bzt (bztsrc@gitlab), MIT license
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL ANY
 * DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * @brief State-Mode GUI multiple window demo program
 */

/* GLFW uses a hidden global state. So to support multiple windows, we have to initialize and terminate outself once
 * SMGUI itself doesn't care how many contexts there are */
#define UI_BACKEND_INITIALIZED
#define UI_IMPLEMENTATION
#include <ui.h>

int main(int argc, char **argv)
{
    /* strings are gathered into an array so that you can change the language on-the-fly */
    char *lang[] = { "Multiple windows demo" };

    /* variables to store game states */
    int win_closed = 0;

    /* form referencing those variables */
    ui_event_t *evt;
    ui_t ctx1, ctx2, ctx3;
    ui_form_t form[1] = { { .type = UI_END } };

    /* GLFW uses a hidden global state. So to support multiple windows, we have to initialize and terminate outself once */
    glfwInit();

    /* open multiple windows */
    ui_init(&ctx1, 1, lang, 640, 480, NULL);
    ui_init(&ctx2, 1, lang, 640, 480, NULL);
    ui_init(&ctx3, 1, lang, 640, 480, NULL);

    while(win_closed < 7) {
        /* if first window isn't closed yet, get events, and if user clicked X or Escape pressed, close it */
        if(!(win_closed & 1) && (!(evt = ui_event(&ctx1, form)) || (evt->type == UI_EVT_KEY && evt->key[0] == 0x1b))) {
            ui_free(&ctx1);
            win_closed |= 1;
        }
        /* if second window isn't closed yet, get events, and if user clicked X or Escape pressed, close it */
        if(!(win_closed & 2) && (!(evt = ui_event(&ctx2, form)) || (evt->type == UI_EVT_KEY && evt->key[0] == 0x1b))) {
            ui_free(&ctx2);
            win_closed |= 2;
        }
        /* if third window isn't closed yet, get events, and if user clicked X or Escape pressed, close it */
        if(!(win_closed & 4) && (!(evt = ui_event(&ctx3, form)) || (evt->type == UI_EVT_KEY && evt->key[0] == 0x1b))) {
            ui_free(&ctx3);
            win_closed |= 4;
        }
    }

    /* GLFW uses a hidden global state. So to support multiple windows, we have to initialize and terminate outself once */
    glfwTerminate();

    (void)argc; (void)argv;
    return 0;
}