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

[AnuthaDev]

Smol Code

Summary of the Pull Request

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

References

https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-ncactivate
#5881
#3025
#7015

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
• Documentation updated. If checked, please file a pull request on our docs repo and link it here: #xxx
• Schema 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

(Potato™ PC, no compile)

[AnuthaDev]

Phone: 1, Code-Format Checker: 0

[AnuthaDev]

BTW, I would love some guidance on how to compile just the minimum projects necessary for testing UI changes (preferably using VS)

[AnuthaDev]

अरे कोई रिव्यू कर दो

[DHowett]

I'm still pretty worried about including these in the list of window states. I think they need to be a separate enum. Here's why:

The window is always aware of its current visual state, right...

What happens if you maximize it, then un-focus it, and then focus it again?

The visual state, according to the window, is no longer "maximized." It's "focused." It totally forgot that it was maximized!

We need to track the focus state separately from whether the window is normal, maximized or iconified.

[AnuthaDev]

Oh, I thought I had fixed that🤔, nvm, doing it asap

[zadjii-msft]

BTW, I would love some guidance on how to compile just the minimum projects necessary for testing UI changes (preferably using VS)

To test these changes, you should be building and running "CascadiaPackage" in VS. That's the project that's the complete Terminal package.

[ghost]

This pull request has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 7 days. It will be closed if no further activity occurs within 7 days of this comment.