Some people like to have preedit support in textbox

[vczh]

AvaloniaUI/Avalonia#8963

[vczh]

@Yangff offers me a piece of working tsf code which could help. I copied it to this file:
https://github.com/vczh-libraries/GacUI/blob/master/Test/GacUISrc/GacUI_Host/TsfTestWindow.cpp

[fanlusky]

Any progress about this? Can gacui now support tsf preedit perfectly?

[vczh]

Not yet, I got so many other features to do. But the above file is supposed to demo the idea.