Fixed issue with ScaleX error on Android 9 and 11

[zinvob]

#407

• All projects build
• Follows style guide lines
• Relevant documentation was updated
• Rebased onto current develop

[LuckyDucko]

@zinvob can you show me how you reproduced the code?

Just curious if instead of the if statement, we could use null-coalesce and null conditional operators to change the code from

_defaultOpacity = page.Opacity;
if (double.IsNaN(_defaultOpacity))
    _defaultOpacity = 1;

to

_defaultOpacity = page?.Opacity ?? 1

[zinvob]

_defaultOpacity = page?.Opacity ?? 1

Page is not null and Opacity is not null (it's NAN). Your sample will just still produce _defaultOpacity = NAN. There must be a NAN check. It seems that this problem is due to the page being partially closed down when checking for Opacity. This seems to give different effects on different versions. On my system I can reproduce it on 9 and 11.

[LuckyDucko]

@zinvob Ah I see, why I wanted some example code so I could verify where you were coming from.

It's unusual that this affected android only, perhaps there is a deeper issue here concerning timing, if I follow your idea about partially closed pages. I'll keep that in mind. Otherwise, good job 👍

[martijn00]

@rotorgames My nuget api key has expired. Can you send a new one on Slack or email, or give me direct access to the nuget?

[nathankim0]

Wow, I found this pr while having a hard time encountering a ScaleX error in v2.0.0.13. The error was resolved after updating to v2.0.0.14. Thank you very much.