lv_subject_get_previous_string() function

Get the previous value of an string subject

Syntax

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Summary

Declaration

Definition

const char * lv_subject_get_previous_string(lv_subject_t * subject);

Argument

Description

subject

pointer to the subject

pointer to the buffer containing the current value

NULL will be returned if NULL was passed in `lv_subject_init_string()` as `prev_buf`

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