`BottomNavigation` doesn t cast a shadow upwards although I kotlinlang #compose

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Title

p

pavi2410

06/21/2021, 7:44 AM

BottomNavigation

doesn't cast a shadow upwards, although I've set

elevation = 16.dp

to it.

Update: It is there but not visible enough. I've tried setting elevation to a bigger value like

64.dp

Using

Modifier.shadow

doesn't work at all

a

Alex

06/21/2021, 8:49 AM

This probably happens because of the way android casts shadows

the implied lightsource is slightly above the upper part of the screen

so the bottom bar would receive a shadow cast below (which is outside of the screen area)

j

Javier

06/21/2021, 8:54 AM

Not same but slightly related https://issuetracker.google.com/issues/160665122

p

pavi2410

06/21/2021, 10:58 AM

@Alex Material spec shows shadow upwards https://material.io/components/bottom-navigation#specs

https://storage.googleapis.com/spec-host-backup/mio-components%2Fassets%2F16_mdeMoej9KYqE6_7gV0qw6H-1arSKmK%2Fspecs-bottomnav-mobile-portrait.png▾

a

Alex

06/24/2021, 5:57 PM

@pavi2410 It does, but its a very subtle little thing, compared to the one it would cast below. The elevation just has a lot less impact on shadows cast upward as opposed to downward.

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