ScrollViewer not scrolling to end with bottom padding...

[trashhacker]

Describe the bug

ScrollViewer not scrolling to end with bottom padding.

To Reproduce

create scrollviewer -> create content that is bigger than scrollviewer view -> add padding to scrollviewer (bottom)
see result

Expected behavior

No response

Avalonia version

11.1.3

OS

No response

Additional context

No response

[timunie]

Can't reproduce with vanilla Avalonia-FluentTheme. Do you use any custom Theme?

[trashhacker]

look at my repro, no im using the default FluentTheme atm or forever idk yet

the last row schould be red but its not visible and with a padding of 100 at bottum i should have a gap bottom.
https://github.com/trashhacker/Avalonia.Repro.git

[timunie]

Ah I see. DataGrid doesn't work well inside a ScrollViewer which is by design. It's due to virtualization and performance reasons. So either move the dg outside of the scrollviewer or consider to use a different control like ListBox or ItemsControl. TreeDataGrid might work but never tried it yet.

[trashhacker]

Dude it is a stackpanel!!
3red tab, maybe i forgot to publish it
Currently in the way... Doing it later today

[timunie]

@trashhacker I hope dude was meant just nice in this context and not disrespectful!

We will not debug your App on tab 3 of a larger App. If you have an issue, make the sample to reproduce as small as it can be. Not somewhere in this or that region of the App.... Sorry but we don't have enough time to debug bigger Apps. If you have a support agreement that may be a different thing.

Thanks for your understanding.b

[trashhacker]

Sure it was, but im Not an Idiot at all thats a Bug in Scrollviewer If i dont see the Last Line, neither the padding

Hmm OK thought would be a good Idee to collect the issues in one repro and Not makind x of them for every issue

ITS Not as bog as you think Just 3 tabs

  <ScrollViewer  Padding="100, 0, 100, 100">
    <StackPanel>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut"/>
      <TextBlock Text="Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut" Foreground="Red"/>
    </StackPanel>
  </ScrollViewer>

[timunie]

Thank you, I updated the issue labels accordingly. Indeed, looks like Padding is calculated wrong for ScrollViewer 🤔

[trashhacker]

I thank u for your great work with Avalonia and your fast support, im sorry for any disagreements

[timunie]

@trashhacker just to make sure we're on the same line, we can have different opinions and we can have misunderstandings, but we all should be kind to each other. Your recent comment is how community can and should work together 👍🤗.