Feature Request: Add option to use native Window Controls in Windows 11

[Skyyblaze]

I know you have been adding a lot of features and did a lot of great work on Fly recently so I don't really want to add something on-top of your pile but this issue made me wonder, could you maybe add an option to Fly to use the System Theme for the Min/Max/Close Buttons?

For people like me that use Custom Themes that would improve consistency. Notepad does it so it seems to be possible in some capacity:

[riyasy]

Now how is fly shown when you are using custom theme?
Other than adjusting icon colors (so that they are visible in transparent mode), I haven't done anything special.

[Skyyblaze]

This is how Fly draws them on my end:

So Notepad seems to pull the graphics from the themes' .msstyles file while Fly does not.

[riyasy]

    titleBar.ExtendsContentIntoTitleBar = true;
    titleBar.ButtonBackgroundColor = Colors.Transparent;
    titleBar.ButtonInactiveBackgroundColor = Colors.Transparent;
    titleBar.ButtonForegroundColor = Colors.Gray;

These are the only customization which I do. If I don't do this, We will get a distinct tilte bar as in usual applications. When I get some free time, I shall make a version like that to check on your end to know whether this code prevents the .mssstyles from getting applied.

[Skyyblaze]

Hmm interesting but alright thanks, I'll gladly help with testing!

[riyasy]

Or you could use the test app which I had made while debugging the Nvidia issue in #55
Run WinUIImageTest.exe

https://drive.google.com/file/d/1wqjom0cYMXh_wVqGI5NtkwOw4XBbmWP3/view?usp=sharing

[Skyyblaze]

Alright sure! Here the tab-bar isn't "glass" like in Notepad but it does use the native, themed window controls!

[riyasy]

@Skyyblaze .. I am holding this until Microsoft/somebody else comes up with a solution. As I understand if I extend the contents of the window into the titlebar area or try to control the caption button styles, the native styles (or customized ones like in your case) will be overwritten.

[Skyyblaze]

@riyasy Ah I see, thanks for the heads-up that makes sense. So I guess Notepad gets away with it because the tabs don't count as "content" on a technical level?

[riyasy]

@riyasy Ah I see, thanks for the heads-up that makes sense. So I guess Notepad gets away with it because the tabs don't count as "content" on a technical level?

Most probably.

[Skyyblaze]

Alright thanks for the clarification, Windows works in mysterious ways sometimes.

[Skyyblaze]

I am not sure if this changes anything for Fly but I thought I would mention it, Microsoft Edge now seems to follow custom-themes too:

I'm not sure if this means WinUI in general will go into that direction but it has me slightly hopeful.