Make sure caption controls "dim out" when window loses NC focus

[AnuthaDev]

Hello frands, I gib smol code

Summary

Make the caption controls "dim out" when window loses focus

References

https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-ncactivate
#5881
#3025

PR Checklist

• Applies to Epic: Fix remaining issues with non-client drawing #1625
• CLA signed. If not, go over here and sign the CLA
• Tests added/passed
• Requires documentation to be updated
• I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Detailed Description of the Pull Request / Additional comments

Added a handler for WM_NCACTIVATE to propagate the focus change to the Titlebar Control.

The unfocused color is set to ForegroundBaseLow

Validation Steps Performed

None
Typed code on phone, PC is too weak to compile the whole project.

Also, My combined knowledge of c++ and xaml is still miniscule, so please have mercy😅😅

[DHowett]

😢 you could have just updated the existing pull request/asked for it to be reopened lol

[DHowett]

You haven't resolved the issues brought up in #6577. When you do, we'll reopen that one. It's not worthwhile to submit the same change without updates when the bot closes it because you haven't updated it :P

[AnuthaDev]

You haven't resolved the issues brought up in #6577. When you do, we'll reopen that one. It's not worthwhile to submit the same change without updates when the bot closes it because you haven't updated it :P

Uhmm, please check again

[AnuthaDev]

@DHowett I copied the description from that PR and edited it afterwards...

[AnuthaDev]

😢 you could have just updated the existing pull request/asked for it to be reopened lol

Oh well, that didnt cross my mind lol...(and anyways, that thread has a lot of noise...)

[DHowett]

Oh, I see. Okay. We'll review this. Thanks/sorry!

[AnuthaDev]

bot closes it because you haven't updated it :P

Sorry, I was busy studying for exams.😞😞

[AnuthaDev]

Hmm, how do I implement bool Focused() in the .cpp file?(using a private variable for focus state? I thought the idl enabled some sort of property access syntax...), I dont know c++, lol.😅😅

Do we even need a getter...

[zadjii-msft]

Hey so I finally had a chance to loop back on this PR. Turns out, you're super close to getting this working right. I threw together the remaining bits in 9a77620 if you want to take a look - you should be able to merge them into your PR without much hassle.

Thanks for the patience!

[AnuthaDev]

@zadjii-msft Thanks a lot!😄

I threw together the remaining bits in 9a77620 if you want to take a look

Thanks, but as I mentioned in the description, I can't compile the code to test. Code looks good😊.

you should be able to merge them into your PR without much hassle.

Ohhh, I am not too sure about that😅. I only know the most trivial git commands and especially after the change of base branch, I am afraid I would mess up.

So, if you could tell me exactly what commands I need to use, I would be extremely grateful 🙏🙏.

[AnuthaDev]

Tried rebasing, failed miserably