How is NavigationViewDefaultPaneBackground set in winui3 Gallery

[mjishnu]

hello i am new to windows app development and was wondering how NavigationViewDefaultPaneBackground is set. i tried to search both online and read the app source but i am not able to find any clue. as of my knowledge the mica, acrylic material, backdrop and BlurAmount property of acrlicbrush are not supported in winui3 so how is it achieving the effect.

images:

(not asking about this:)

(want to know how this is set:)

(sorry for the mess i was just testing out things)

[marcelwgn]

Hi, sorry for the delayed response. WinUI 3 does in fact support Acrylic and Mica backdrops, however they did not at start. With regard to NavigationView and the NavigationViewDefaultPaneBackground, according to the source code of WinUI 3 it is set to AcrylicInAppFillColorDefaultBrush. If you want to learn more about Mica and Acrylic in WinUI 3, the gallery also has dedicated pages for that 😊