How to add back the removed knob of an arc

How-to
1

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Description

I removed the Knob of an arc during the start of some conditions and I want to add the knob again.
I used the following API.
lv_obj_remove_style(arc, NULL, LV_PART_KNOB);

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

ESP32

What LVGL version are you using?

8.3

What do you want to achieve?

creating a GUI for a smart timer

What have you tried so far?

2

You don’t have to remove the style. Just set the background opa to 0 and when you want it back set the opa to 255

1 Like
3

Hello kdschlosser,
I used lv_obj_set_style_bg_opa and did work.
Thank you very much!

4

no worries m8, mark my post as the solution so other will know it is solved.

5

Hi
I done it. Thank you!