Popup of a ComboBox doesn't show on MacOS

[JanTamis]

Describe the bug
Popup of a ComboBox doesn't show on MacOS

To Reproduce
Add a ComboBox to a window and add a ItemSource

Expected behavior
the popup is shown with the items in the item source

Screenshots

Desktop (please complete the following information):

• OS: Mac
• Version 11.0.1

Additional context

[SKProCH]

Also, can be related to AvaloniaCommunity/Material.Avalonia#128

[JanTamis]

I've tried it with the fluent theme and it doesn't work either.

[timunie]

@JanTamis please provide a minimal sample to reproduce

[JanTamis]

@timunie How would you like the sample (zip or as GitHub project)

[timunie]

GitHub link is preferred as one can file a PR if a simple fix is there, but zip also works for us.

[JanTamis]

sample: https://github.com/JanTamis/DropDownTest

[maxkatz6]

Works here.

[JanTamis]

Could it be because im using the Sonoma beta?

[timunie]

@JanTamis maybe you can do the following:

1. clone Avalonia source (mind build instructions)
2. add your sample to samples/Sandbox for testing
3. Try to debug it on your machine. If you find anything that fixes your issue, a PR is welcome.

[dbriard]

Got similar issue when I tested on MacOS, not only with ComboBox, but with all popups and flyouts in my app... I don't know how it happened and what manipulation I've done, but 30s or a minute after I've noticed the issue, it get back to normal in the same testing session. It was with Rc1 may be...

I do not have a Mac to run new tests.

[JanTamis]

I'll take a look if i can find in which version of Avalonia it begun happening.

[MilkyBrain]

On my end, this issue occurs when I run the app and have its window over the current full-screen Rider window. However, if I move the app window to the desktop or switch it to full screen, the ComboBox items show up.

[JulanDeAlb]

On my end, this issue occurs when I run the app and have its window over the current full-screen Rider window. However, if I move the app window to the desktop or switch it to full screen, the ComboBox items show up.

Exactly what I encounter too on a M2 MacBook

[henrrymoraes83]

I have the same issue using Avalonia 11.0.7 on Mac OS 14.2.1 (23C71). Both latest version. It is a Bug on Rider Plugin because if you run the app the combo box work correctly.

[timunie]

Seems really be related to Rider i Fullscreen mode. Has anybody reported it to Rider and could share a link?