[Bug] ScrollViewRenderer HorizontalFadingEdgeEnabled ignored on horizontal ScrollView orientation

[lukashaertel]

Description

Setting HorizontalFadingEdgeEnabled in a ScrollViewRenderer does not produce the expected result of fading the left and right edges on overflowing content. After looking into the source code, it appears that a second view is created for horizontal scroll behavior. The flags for controlling edge fading are not delegated to that view.

Steps to Reproduce

1. Set a custom renderer for the ScrollView
2. Set the HorizontalFadingEdgeEnabled to true and invoke SetFadingEdgeLength on element and orientation change

Expected Behavior

Left and right edge of the scrolled content should be faded out, if there is more content to scroll to.

Actual Behavior

The default look is still present. No edges are faded.

Basic Information

• Version with issue: 4.6.0.800

Workaround

Overriding AddView in the renderer to intercept the actually used AHorizontalScrollView and setting the fading edge properties on that view resulted in the correct behavior of fading left and right edges.

[samhouts]

Can you please attach a small project that demonstrates this issue? Thanks!

[lukashaertel]

Project to reproduce the bug:

hscrollfade.zip

[rmarinho]

Thanks made a fix for it #11287