Deprecate TabView, RadialGradientBrush, Singleton, FacebookService

[michael-hawker]

Related #3203

Marking things that will be removed in 7.0. Both TabView and RadialGradientBrush have graduated 🎉🎉🎉. There's one element missing from the WinUI RadialGradientBrush, but we'll see if we can get it in their 2.5, it should be a simple add. (@chingucoding were you looking at microsoft/microsoft-ui-xaml#2385 or the MenuBar one or both?)

PR Type

What kind of change does this PR introduce?

[ghost]

Thanks michael-hawker for opening a Pull Request! The reviewers will test the PR and highlight if there is any conflict or changes required. If the PR is approved we will proceed to merge the pull request 🙌

[marcelwgn]

Hi @michael-hawker !

Regarding the feature parity of RadialGradienBrush, I think that this might not be possible to implement right now. The WinUI brush uses the CompositionRadialGradientBrush which does not expose this property (or anything comparable). Maybe somebody else knows more about this, but I don't think that the current implementation would be able to provide an AlphaMode property.

I haven't looked at the MenuBar issue.

[HerrickSpencer]

I suggested some changes to the FB obsolete message, as well as pointed out the obsolete message is missing from the FB sample json file.
If you fix/disagree with these comments, you can check in.

[michael-hawker]

I'll address Herrick's comments later tonight and then we can merge. Thanks!

[ghost]

Hello @michael-hawker!

Because this pull request has the auto merge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (@msftbot) and give me an instruction to get started! Learn more here.

[michael-hawker]

Hmm, wonder if the bot only triggers the merge after approvals and not after builds?

FYI @Kyaa-dost @azchohfi