Vertical layout with SetAsLastSibling creates a mess

I have a form with open source combobox and texts. When clicking on the combobox it calls SetAsLastSibling to open the options on top of other items. Combining with Vertical layout this cause the combobox to jump to the end of the form and cause problems.

Is there another way to show the options on top without changing the order?

 

depending on the order of your vertical layout group, it will set the object position based on the hierarchy index, so setting sibling index will always change its position.
Can you avoid calling SetSibling and instead open the contents of your combobox in another panel that ignores layout.

using textmeshpro dropdown usually works fine for me, not sure which one you are using though.

 

I'm using https://bitbucket.org/UnityUIExtensions/unity-ui-extensions which uses the SetSibling.

Maybe I can hack something like you said but I wonder how textmeshpro do it, perhaps a better/elegant solution.

 

BTW, my mistake, I'm having problem with AutoCompleteComboBox, otherwise I would use the TMP dropdown..

 

In this case, I would try to work out the UI hierarchy to have the object be child of an ignore layout parent without layout group. So setting sibling index wouldn't cause any automatic changes.

 

I can't use ignore layout. Anyway, setting the AutoComplete a child do cancel the effect of SetSibling and cause the open combox to be under other elements and not topmost.
Maybe there's elegant shader solution for topmost although its 2D.