How to refresh the display after lv_dropdown_set_options()?


I have a dropdown list with “show” enabled, so it displays the selected options.
My concern is when I’m modifying the list of options using lv_dropdown_set_show_selected(), the old active option is displayed until I click on the dropdown.
Even if I use lv_dropdown_set_selected() after this modification.

So how can I make the display refreshed ?

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

ESP32 / Lilygo T-Watch 2020 v1

What LVGL version are you using?


What do you want to achieve?

In the description :slight_smile:

What have you tried so far?

With / without lv_dropdown_set_selected()

Screenshot and/or video

Example vidéo :

1/ Initially the 1st dropdown show “RDC” and 2nd the corresponding entry with is “Parents”.

2/ When I click on the 1st one, an even is called that updates second’s options.
So I’m expected to see “Amis” but “Parents” remains.

3/ Only when I’m clicking on the 2nd one, it is update

So any tips welcome :slight_smile:


ps : the source code is on my git, especially in file TlShutter.cpp

Update your LVGL version - we only support the release/v7 branch on GitHub.

(If you really don’t want to update very far, 7.8.1 is the earliest version containing the fix, though I strongly advise using latest v7 if possible.)

Ha, ok, so it’s an issue with the library itself.
Thanks for your reply, I’ll request Lilygo to upgrade their framework.



Interesting… that’s now a second framework I know of that hasn’t updated past 7.7.2. There weren’t any big changes in 7.8 so I’m puzzled as to why.

For Liygo one, I guess it’s because I guess Lewis is more focusing on examples for the new products they are released very often than to upgrade the core :slight_smile:


So, I upgrade to 7.11.0 … but the issue remains :frowning:

Any idea ?