When a Shape (Line, Path, etc) changes size, the layout size does not change, so the Shape gets clipped

[spadapet]

Description

Shapes do not update their layout size when their Data changes. For example, changing Path.Data, Line.Y2, or Polyline.StrokeThickness will keep the old layout size, which can clip the shape.

I created a branch to work on a fix for this, but it was taking long to debug and the fix seemed "scary" to me (I didn't want to break layout), but here it is:

• main...dev/peterspa/PathLayout_fix_13802

That could be the start of a real fix, but I'm not sure about the hacks needed to force layout to compute a new Shape size.

Steps to Reproduce

Repro project: ShapeResize.sln:

• https://github.com/spadapet/maui_bugs/tree/main/ShapeResize

Running that app shows:

Click the button to add 50 to the line height:

The line extends past the green border and gets clipped. If you resize the window, then layout updates:

Link to public reproduction project repository

https://github.com/spadapet/maui_bugs/tree/main/ShapeResize

Version with bug

8.0.0-rc.1.9171

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android, Windows, macOS

Affected platform versions

net8.0-windows10.0.19041.0

Did you find any workaround?

After updating a Shape (Line, Path, etc) then it needs to be removed and re-added to the app in order to update its layout size.
That's what XAML Hot Reload currently does in order to work around this layout issue. If you have access, here's the UITools PR:

• https://github.com/xamarin/UITools/pull/1800

Relevant log output

No response

[XamlTest]

Verified this on Visual Studio Enterprise 17.8.0 Preview 3.0(8.0.0-rc.2.9373). Repro on Windows 11, Android 13.0-API33 and iOS 16.4 with below Project:
ShapeResize.zip

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[jsuarezruiz]

The issue will be fixed by https://github.com/dotnet/maui/tree/fix-17942

[softlion]

The issue will be fixed by https://github.com/dotnet/maui/tree/fix-17942

That issue also occurs on iOS and Android sporadically with the PathGeometry shape and the Line shape.