Bug on Scrolling

[FizboIV]

Hi, I'm working on a simple machine interface using

• RaspberryPi 4b
• Raspberry 7" touch display 800x480
• OS: RaspberryPi OS Lite v 11 Bullseye
• Weston v.9.0.0

I implemented a scrollable table and every time I scroll everything except the table vanishes.

How it looks like before scrolling:

How it looks like after scrolling:

I also build the flutter app for web. There's everything working fine and as expected. Do you have any ideas how to fix it?

Thank you

[HidenoriMatsubayashi]

Can you check if this issue occurs on flutter for Linux desktop or Android/iOS? I believe this doesn't depend on flutter-elinux. I think it depends on flutter-engine or flutter framework. Also, please check your Dart code, too.

[HidenoriMatsubayashi]

Just FYI.

I also build the flutter app for web

flutter engine of the flutter for web is completely different from desktops and mobiles (iOS/Android). Thus, flutter for web is not helpful.

[FizboIV]

I tested a bit today and it does work on iOS. I checked on iPhone and iPad. Unfortunately I can't test on other platforms.

I also noticed that as long as I plug in a mouse and scroll with the mouse the bug doesn't not happen. Maybe it is a problem with the touch input?

[HidenoriMatsubayashi]

Can you share the source code?

[FizboIV]

code can be found here: https://github.com/FizboIV/embedded_test

its the custom_table widget that is malfunctioning

[HidenoriMatsubayashi]

Now, I could reproduce this issue.

[HidenoriMatsubayashi]

@FizboIV This issue occurs on RPI4 + Weston v9, but it doesn't happen on RPI4 + Sway. Can you please try to run the app using Sway instead? IIRC, Weston is basically a reference design for Wayland compositor. I think it has some issues.

[FizboIV]

That did the trick! Thank you very much! I really appreciate it. :)