wasm-micro-runtime/samples/simple/wasm-apps/gui.c

/*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */


#include <stdlib.h>
#include <unistd.h>
#include "wasm_app.h"

static void btn_event_cb(wgl_obj_t btn, wgl_event_t event);

uint32_t count = 0;
char count_str[11] = { 0 };
wgl_obj_t hello_world_label;
wgl_obj_t count_label;
wgl_obj_t btn1;
wgl_obj_t label_count1;
int label_count1_value = 0;
char label_count1_str[11] = { 0 };

void timer1_update(user_timer_t timer1)
{
    if ((count % 100) == 0) {
        snprintf(count_str, sizeof(count_str), "%d", count / 100);
        wgl_label_set_text(count_label, count_str);
    }
    ++count;
}

void on_init()
{
    char text[32] = {0};

    hello_world_label = wgl_label_create((wgl_obj_t)NULL, (wgl_obj_t)NULL);
    wgl_label_set_text(hello_world_label, "Hello world!");
    wgl_label_get_text(hello_world_label, text, sizeof(text));
    printf("Label text %d %s \n", wgl_label_get_text_length(hello_world_label), text);
    wgl_obj_align(hello_world_label, (wgl_obj_t)NULL, WGL_ALIGN_IN_TOP_LEFT, 0, 0);

    count_label = wgl_label_create((wgl_obj_t)NULL, (wgl_obj_t)NULL);
    wgl_obj_align(count_label, (wgl_obj_t)NULL, WGL_ALIGN_IN_TOP_MID, 0, 0);

    btn1 = wgl_btn_create((wgl_obj_t)NULL, (wgl_obj_t)NULL); /*Create a button on the currently loaded screen*/
    wgl_obj_set_event_cb(btn1, btn_event_cb); /*Set function to be called when the button is released*/
    wgl_obj_align(btn1, (wgl_obj_t)NULL, WGL_ALIGN_CENTER, 0, 0); /*Align below the label*/

    /*Create a label on the button*/
    wgl_obj_t btn_label = wgl_label_create(btn1, (wgl_obj_t)NULL);
    wgl_label_set_text(btn_label, "Click ++");

    label_count1 = wgl_label_create((wgl_obj_t)NULL, (wgl_obj_t)NULL);
    wgl_label_set_text(label_count1, "0");
    wgl_obj_align(label_count1, (wgl_obj_t)NULL, WGL_ALIGN_IN_BOTTOM_MID, 0, 0);

    /* set up a timer */
    user_timer_t timer;
    timer = api_timer_create(10, true, false, timer1_update);
    api_timer_restart(timer, 10);
}

static void btn_event_cb(wgl_obj_t btn, wgl_event_t event)
{
    if(event == WGL_EVENT_RELEASED) {
        label_count1_value++;
        snprintf(label_count1_str, sizeof(label_count1_str),
                 "%d", label_count1_value);
        wgl_label_set_text(label_count1, label_count1_str);
    }
}