smgui/examples/demo.c

/*
 * src/demo.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 demo program
 */

#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 */
    enum { WINDOW_TITLE, POPUP_TITLE, BUTTON_TITLE, EASY_TITLE, HARD_TITLE, VOLUME_TITLE };
    char *lang[] = { "Basic demo", "Show", "Button", "easy", "hard", "Volume:" };

    /* variables to store game states */
    int button = 0, difficulty = 0, volume = 25;

    /* form referencing those variables, you use a HTML flow like layout */
    ui_t ctx;
    ui_form_t popup[] = {
        { .type = UI_BUTTON, .flags = UI_FORCEBR, .ptr = &button, .value = 1, .label = BUTTON_TITLE },
        { .type = UI_RADIO, .flags = UI_NOBR, .ptr = &difficulty, .value = 0, .y = 5, .label = EASY_TITLE },
        { .type = UI_RADIO, .flags = UI_FORCEBR, .ptr = &difficulty, .value = 1, .x = 20, .label = HARD_TITLE },
        { .type = UI_LABEL, .flags = UI_NOBR, .y = 5, .label = VOLUME_TITLE },
        { .type = UI_SLIDER, .ptr = &volume, .max = 100 },
        { .type = UI_END }
    };
    ui_form_t form[] = {
        { .type = UI_POPUP, .align = UI_CENTER | UI_MIDDLE, .x = UI_PERCENT(50), .y = UI_PERCENT(50), .m = 10,
            .ptr = &popup, .label = POPUP_TITLE },
        { .type = UI_END }
    };

    /* initialize the UI context, pass it the string array, the window size and icon */
    ui_init(&ctx, sizeof(lang)/sizeof(lang[0]), lang, 640, 480, NULL);

    /* wait until user closes the window */
    while(ui_event(&ctx, form)) {
        /* handle button, you could do this from another thread if you want */
        if(button) {
            printf("button clicked\n");
            button = 0;
            ui_refresh(&ctx);
        }
    }

    /* destroy window, free resources */
    ui_free(&ctx);

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