Proposal: Add ScrollView control to WinUI 2.x

[michalleptuch]

Proposal: Add ScrollView control to WinUI 2.x

Summary

Request is to add ScrollView control to WinUI 2.x. This control works better in XAML Islands app than ScrollViewer. ScrollViewer control has a bug that slows scrolling down on monitors with higher scaling than 100%. It's especially noticeable using pen or touch. Microsoft Terminal has the same issue. I'm not sure if ScrollViewer can be fixed for all supported versions of Windows 10 and 11 so ScrollView control could be the best solution at this moment.

Rationale

There are a few samples XAML Islands app (WPF + UWP) and scrolling with different scaling. I used a pen to show cursor position and element that should follow position of the cursor.

100% (it works well)

150%

250%

Scope

Capability	Priority
This proposal will allow developers to use ScrollView as container for scrollable content	Must
This proposal will allow developers to use ScrollView in controls like ListView, GridView, ComboBox, etc.	Must

Open Questions

If adding ScrollView is impossible, is it possible to change dynamics of scrolling in ScrollViewer control?

[itsWindows11]

I think it's better to modify the ScrollViewer behavior rather than creating an entirely new control.

[michalleptuch]

@itsWindows11 how can I do that? 😊

[itsWindows11]

@itsWindows11 how can I do that? 😊

I don't know actually, it's just a note in case anyone wants to work on this issue

[itsWindows11]

I think it's better to modify the ScrollViewer behavior rather than creating an entirely new control.

Actually no, extensions for adding functionality from ScrollView to ScrollViewer may be possible but might require more work. I thought this was a proposal for a new control so disregard that comment.

It could be certainly done from the platform end but users won't get smooth scrolling on earlier updates.