Add WinUI 3 platform

[cwensley]

Windows appears to be moving over to WinUI 3 as the "modern" way to build apps, and touts this as the framework they use to build Windows components. It would be nice to have this as a more modern option than using WinForms or WPF, even though it is likely missing a lot of functionality that will be needed to make a fully rounded out platform in Eto.

[ghost]

i seriously advise against this since winui 3 is very very slow and Microsoft doesn't care about its issues at all, its the sole reason i moved to linux.

[nvella]

WinUI would be a 'nice to have', but in my eyes is not mature enough, nor appropriately provides enterprise/commercial application developers with the ulilitarian controls, visual styling, or flexibility of WinForms and WPF; WinUI suits only certain use-cases, and those don't tend to be thick desktop apps which I've found Eto exceptional for. Personally, I wish MS would take a page out of Apple's book and iterate, not overhaul.

[vinidiktov]

Eto.Forms apps with WPF and Windows.Forms backends look very dated. I would love to have WinUI 3 as an additional backend.

Is any work being done on this issue?

If not how would one start implementing WinUI support?

[cwensley]

With WPF you can create a modern theme but it takes a lot of effort.

Creating a WinUI 3 platform is certainly a lot more effort, but in case someone like yourself would want to take that on I've created a bare bones platform that can create a Form with a Label on it here: #2652

I'll see what I can do to get that merged in soon so I can start accepting pull requests filling out more of its functionality.

[vinidiktov]

I'll see what I can do to get that merged in soon so I can start accepting pull requests filling out more of its functionality.
That's awesome! I hope it will get merged soon.