[Enhancement] Hide ScrollView scroll bars.

[kingces95]

Rationale

Designers, in pursuit of their UX, may reasonably ask that the scroll bar be removed from a ScrollView.

see https://forums.xamarin.com/discussion/73353/how-to-hide-scroll-bar-in-scrollview
see https://stackoverflow.com/questions/9837003/how-to-hide-remove-the-scrollbar-in-uiscrollview-in-iphone

Implementation

public class ScrollView {
	public static readonly BindableProperty ShowVerticalScrollBar; // bool
	public static readonly BindableProperty ShowHorizontalScrollBar; // bool
}

Expected Result

Hides vertical and/or horizontal scroll bar.

Implications for CSS

None.

Backward Compatibility

None. By default, properties are true.

Difficulty : Easy

[jassmith]

This should be implemented with an enum with some kind of ScrollBarVisibility.

public enum ScrollBarVisibility
{
  Default,
  Always,
  Never,
}

seems like the logical choice forward. There will likely be other visibility modes cropping up and a need to make sure there is a default in case default behaviors differ on different platforms.

[bmacombe]

@davidortinau I'll pick this one up since the repeater control is in limbo at the moment.

[jassmith]

Hey checking in to see if this is still being worked on. If not we are going to move it back to being up for grabs.

[bmacombe]

Its done...PR is in the community fork. Let me know what I need to do

[bmacombe]

XamarinFormsCommunity#6

[jassmith]

Can you see why we are not getting the PR upstreamed please? The community fork cant be merged wholesale so we need to receive your PR upstream somehow.

[jassmith]

Thank you for the link, I will add a review there :)

[bmacombe]

Thanks! I'll take a look...my first time contributing like this, so I'm a bit lost :)

[bmacombe]

I'll clean up the code in the community fork based on the review and then create a PR here.

[bmacombe]

#1910

PR with the requested changes from jassmith's review.