lvgl/examples/widgets/textarea/lv_example_textarea_2.c

#include "../../../lvgl.h"
#if LV_USE_TEXTAREA && LV_USE_KEYBOARD && LV_BUILD_EXAMPLES

static void ta_event_cb(lv_obj_t * ta, lv_event_t event);

static lv_obj_t * kb;

void lv_example_textarea_2(void)
{
    /* Create the password box */
    lv_obj_t * pwd_ta = lv_textarea_create(lv_scr_act(), NULL);
    lv_textarea_set_text(pwd_ta, "");
    lv_textarea_set_pwd_mode(pwd_ta, true);
    lv_textarea_set_one_line(pwd_ta, true);
    lv_obj_set_width(pwd_ta, LV_HOR_RES / 2 - 20);
    lv_obj_set_pos(pwd_ta, 5, 20);
    lv_obj_add_event_cb(pwd_ta, ta_event_cb, NULL);

    /* Create a label and position it above the text box */
    lv_obj_t * pwd_label = lv_label_create(lv_scr_act(), NULL);
    lv_label_set_text(pwd_label, "Password:");
    lv_obj_align(pwd_label, pwd_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);

    /* Create the one-line mode text area */
    lv_obj_t * oneline_ta = lv_textarea_create(lv_scr_act(), pwd_ta);
    lv_textarea_set_pwd_mode(oneline_ta, false);
    lv_obj_align(oneline_ta, NULL, LV_ALIGN_IN_TOP_RIGHT, -5, 20);


    /* Create a label and position it above the text box */
    lv_obj_t * oneline_label = lv_label_create(lv_scr_act(), NULL);
    lv_label_set_text(oneline_label, "Text:");
    lv_obj_align(oneline_label, oneline_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);

    /* Create a keyboard */
    kb = lv_keyboard_create(lv_scr_act());
    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);

    lv_keyboard_set_textarea(kb, pwd_ta); /* Focus it on one of the text areas to start */
}

static void ta_event_cb(lv_obj_t * ta, lv_event_t event)
{
    if(event == LV_EVENT_CLICKED) {
        /* Focus on the clicked text area */
        if(kb != NULL)
            lv_keyboard_set_textarea(kb, ta);
    }

    else if(event == LV_EVENT_INSERT) {
        const char * str = lv_event_get_param();
        if(str[0] == '\n') {
            LV_LOG_USER("Ready\n");
        }
    }
}

#endif