[bar] The bar animations time is too short？

How-to
1

Description

void lv_bar_set_anim_time(lv_obj_t * bar, uint16_t anim_time)

uint16_t type max is 65 seconds, for example I make a music process bar, time is not enough.How to solve this problem？

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

esp32

Code to reproduce

#include "lvgl/lvgl.h"

void lv_ex_bar_1(void)
{
    lv_obj_t * bar1 = lv_bar_create(lv_scr_act(), NULL);
    lv_obj_set_size(bar1, 200, 30);
    lv_obj_align(bar1, NULL, LV_ALIGN_CENTER, 0, 0);
    lv_bar_set_anim_time(bar1, 65536);
    lv_bar_set_value(bar1, 100, LV_ANIM_ON);
}
2

I think (but I haven’t tested it) you would have to split the animation into pieces (each 65 seconds long) and run it multiple times. That should give the same visual effect.

1 Like
3

uint16_t range is 0 to 65535.

You are overflowing the variable with 65536.

65536 = 1 0000 0000 0000 0000

4

Set a second long timer to handle the updates or do it as you decode the music stream.

6

How to do this? Would you like to show a code please?

7

Hey, I just tried the bar object, it seems that “lv_bar_set_anim_time” function didn’t work even for 65s as you said, I guess this anim_time is not for bar driving but just a refresh time, the “value” in “lv_bar_set_value” fun maybe what you want, so i tried this: create a timer for counting time, and every second calls the"lv_bar_set_value" fun, and changing the value.

bar_test
bar_test.png758×483 21.3 KB

Like this,hope helpful.
I guess see you in whycan.cn

8

My mistake, in fun “dynamic_drive_bar”, it’s “<=” not “!=” in “if()”