Chartsanimated

Area gradient

A single-series area chart with a soft gradient fill under a draw-on line.

Installation

caveui components are copy-paste Jetpack Compose built entirely on Material 3 — there's no caveui dependency to add. Make sure Material 3 is on your classpath (it ships with the Compose BOM), then copy the Usage snippet below into your project.

kotlin

// build.gradle.kts (module)
dependencies {
    implementation(platform("androidx.compose:compose-bom:2025.06.00"))
    implementation("androidx.compose.material3:material3")
}

Usage

kotlin

@Composable
fun AreaGradient(
    values: List<Float> = listOf(0.7f, 0.55f, 0.6f, 0.38f, 0.46f, 0.28f, 0.34f),
    accent: Color = Color(0xFF8B5CF6),
    modifier: Modifier = Modifier,
) {
    val reveal = remember { Animatable(0f) }
    LaunchedEffect(Unit) {
        reveal.animateTo(1f, tween(1000, easing = EaseOutCubic))
    }
    Canvas(modifier.fillMaxWidth().height(120.dp)) {
        val step = size.width / (values.size - 1)
        val line = Path().apply {
            values.forEachIndexed { i, v ->
                val x = i * step
                val y = size.height * v
                if (i == 0) moveTo(x, y) else lineTo(x, y)
            }
        }
        val area = Path().apply {
            addPath(line)
            lineTo(size.width, size.height)
            lineTo(0f, size.height)
            close()
        }
        clipRect(right = size.width * reveal.value) {
            drawPath(
                area,
                brush = Brush.verticalGradient(
                    listOf(accent.copy(alpha = 0.35f), Color.Transparent),
                ),
            )
            drawPath(line, accent, style = Stroke(3.dp.toPx(), cap = StrokeCap.Round))
        }
    }
}