How to read an added text in a text area

How-to
1

Description

I get a numeric text in a text area through a button matrix pad using the lv_ta_add_text(btnm1_textarea, txt);
I have been trying to convert a text in a text area to a numeric value.
But I don’t know how to read the text in the btnm1_textarea.

What MCU/Processor/Board and compiler are you using?

STM32F7 series

What do you want to achieve?

How can I read the added text in a text area.

What have you tried so far?

Code to reproduce

static lv_obj_t * btnm1_textarea;

static void btnm_event_cb(lv_obj_t * obj, lv_event_t event)
{
  if(event == LV_EVENT_CLICKED) {
    const char* txt = lv_btnm_get_active_btn_text(obj);
    if(txt != NULL)
    {
      if(strcmp(txt, "OK") == 0)
      {
         // convert a text in the text area to a numeric value
         // save a numeric value to a variable
      }
      else
      {
        lv_ta_add_text(btnm1_textarea, txt);
      }
...
}
2

This is a C question, not a LittlevGL question :slightly_smiling_face:. But I think you are looking for strtol or strtoul.

3

Thanks, but my question is how to get the text from the textarea object.
Dose the textarea object have the member containing the text?

4

Have a look at the documentation.

5

Why didn’t I find it? :pensive:
Thanks a lot.

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