#include <lvgl.h>
#if LV_USE_TEXTAREA

static void textarea_event_handler(lv_event_t *e)
{
    lv_obj_t *ta = lv_event_get_target(e);
    LV_LOG_USER("Enter was pressed. The current text is: %s", lv_textarea_get_text(ta));
}

static void btnm_event_handler(lv_event_t *e)
{
    lv_obj_t *obj = lv_event_get_target(e);
    lv_obj_t *ta = lv_event_get_user_data(e);
    const char *txt = lv_btnmatrix_get_btn_text(obj, lv_btnmatrix_get_selected_btn(obj));

    if (strcmp(txt, LV_SYMBOL_BACKSPACE) == 0)
        lv_textarea_del_char(ta);
    else if (strcmp(txt, LV_SYMBOL_NEW_LINE) == 0)
        lv_event_send(ta, LV_EVENT_READY, NULL);
    else
        lv_textarea_add_text(ta, txt);
}

void lv_example_textarea_1(void)
{
    lv_obj_t *ta = lv_textarea_create(lv_scr_act());
    lv_textarea_set_one_line(ta, true);
    lv_obj_align(ta, LV_ALIGN_TOP_MID, 0, 10);
    lv_obj_add_event_cb(ta, textarea_event_handler, LV_EVENT_READY, ta);
    lv_obj_add_state(ta, LV_STATE_FOCUSED); /*To be sure the cursor is visible*/

    static const char *btnm_map[] = {"1", "2", "3", "\n",
                                     "4", "5", "6", "\n",
                                     "7", "8", "9", "\n",
                                     LV_SYMBOL_BACKSPACE, "0", LV_SYMBOL_NEW_LINE, ""};

    lv_obj_t *btnm = lv_btnmatrix_create(lv_scr_act());
    lv_obj_set_size(btnm, 200, 150);
    lv_obj_align(btnm, LV_ALIGN_BOTTOM_MID, 0, -10);
    lv_obj_add_event_cb(btnm, btnm_event_handler, LV_EVENT_VALUE_CHANGED, ta);
    lv_obj_clear_flag(btnm, LV_OBJ_FLAG_CLICK_FOCUSABLE); /*To keep the text area focused on button clicks*/
    lv_btnmatrix_set_map(btnm, btnm_map);
}

#endif
