SlateUI - SMenuAnchor Dropdown Menu Flickering

Development Programming & Scripting UI
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1

Hi there,

I’ve encountered a problem with slate combo menus:
Menus opened with EPopupMethod::CreateNewWindow flickers when it tries to move to a new position after opening, for example when the parent window is dragged to a new position and the menu window tries to follow. This seems to have been fixed in the editor but can still be reproduced in SlateViewer.
The problem also affects SComboBox and SComboButton since both of them are sub-classes of SMenuAnchor.

Any idea how to resolve this?

2

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks

3

Hello,

I had the flickering drop-down menus problem (UE 4.25.4 - 4.26.0) running on Windows 7, spreading to a whole screen sometimes. The solution which works for me: Windows Control Panel > All Control Panel Items > System > Advanced system settings > Advanced > Performance > UNCHECK “Enable desktop composition” et voila!
Then you can even enable the windows animation in UE4 Editor Preferences and it will work.

I hope that it will help you too!

4

It’s been fixed in 4.25.

5

Apparently we were having different problems because I’ve upgraded to UE 4.25 and the issue is gone, but thanks anyways!