How does button get ripple color based on it's contents? I visually see it picks up `contentColor`,...

# compose

[ursus]

How does button get ripple color based on it's contents?

I visually see it picks up contentColor, but I want to find it in sources, I don't see the reference anywhere.

I need it to use a different color

nothing is passed-in to the indication

[Chrimaeon]

@param color the color of the ripple. This color is usually the same color used by the text or iconography in the component. This color will then have [RippleTheme.rippleAlpha] applied to calculate the final color used to draw the ripple. If [Color.Unspecified] is provided the color used will be [RippleTheme.defaultColor] instead.

[ursus]

where are you reading that?

[Chrimaeon]

the documentation of rememberRipple

[ursus]

right but when you look at the sources, the color argument is never specified

[ursus]

.clickable(
    interactionSource = interactionSource,
    indication = rememberRipple(),
    enabled = enabled,
    onClick = onClick
),

[Chrimaeon]

If [Color.Unspecified] is provided the color used will be [RippleTheme.defaultColor] instead.

[ursus]

oh so a composition local?

[Chrimaeon]

yes, part of the MaterialTheme https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]droidx/compose/material/MaterialTheme.kt;l=74?q=MaterialTheme

[youssef hachicha]

you need to dig deep into that composable and get where they set the ripple color than make you. own custom component

[Chrimaeon]

No, you just need to provide a custom Ripple theme.

[ursus]

RippleTheme is deprecated btw

[Chrimaeon]

then just migrate https://developer.android.com/develop/ui/compose/touch-input/user-interactions/migrate-indication-ripple

[ursus]

sure but from what I gather is theres no global way to set a ripple & it needs to be per component.. no?

[Chrimaeon]

https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]leConfiguration&ss=androidx%2Fplatform%2Fframeworks%2Fsupport

[ursus]

hm..weird.. LocalRippleConfiguration that looks fine

[Chrimaeon]

🤷‍♂️ yes, haven’t used it but you can give it a try.

[ursus]

Screenshot_20240525-115938.png