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Copy pathStateAnimations.kt
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/*
* Copyright 2026 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
@file:OptIn(ExperimentalFoundationStyleApi::class)
package com.example.compose.snippets.designsystems.styles
import androidx.compose.animation.core.Spring
import androidx.compose.animation.core.spring
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.style.ExperimentalFoundationStyleApi
import androidx.compose.foundation.style.MutableStyleState
import androidx.compose.foundation.style.Style
import androidx.compose.foundation.style.StyleScope
import androidx.compose.foundation.style.StyleStateKey
import androidx.compose.foundation.style.animate
import androidx.compose.foundation.style.border
import androidx.compose.foundation.style.contentPadding
import androidx.compose.foundation.style.externalPadding
import androidx.compose.foundation.style.focused
import androidx.compose.foundation.style.hovered
import androidx.compose.foundation.style.pressed
import androidx.compose.foundation.style.rememberUpdatedStyleState
import androidx.compose.foundation.style.scale
import androidx.compose.foundation.style.size
import androidx.compose.foundation.style.styleable
import androidx.compose.foundation.style.then
import androidx.compose.foundation.style.transformOrigin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Brush
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.TransformOrigin
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.example.compose.snippets.designsystems.styles.components.BaseButton
import com.example.compose.snippets.designsystems.styles.components.BaseText
val outlinedButtonStyle = Style {
externalPadding(48.dp)
contentPadding(12.dp)
shape(RoundedCornerShape(8.dp))
clip(true)
border(2.dp, lightBlue)
}
val lightBlue = Color(0xFF03A9F4)
val lightPurple = Color(0xFF9575CD)
val lightOrange = Color(0xFFFFE0B2)
val lightRed = Color(0xFFE57373)
// [START android_compose_styles_state_basic]
@Preview
@Composable
private fun OpenButton() {
BaseButton(
style = outlinedButtonStyle then {
background(Color.White)
hovered {
background(lightPurple)
border(2.dp, lightPurple)
}
focused {
background(lightBlue)
}
},
onClick = { },
content = {
BaseText("Open in Studio", style = {
contentColor(Color.Black)
fontSize(26.sp)
textAlign(TextAlign.Center)
})
}
)
}
// [END android_compose_styles_state_basic]
@Preview
// [START android_compose_styles_state_basic_combined_states]
@Composable
private fun OpenButton_CombinedStates() {
BaseButton(
style = outlinedButtonStyle then {
background(Color.White)
hovered {
// light purple
background(lightPurple)
pressed {
// When running on a device that can hover, whilst hovering and then pressing the button this would be invoked
background(lightOrange)
}
}
pressed {
// when running on a device without a mouse attached, this would be invoked as you wouldn't be in a hovered state only
background(lightRed)
}
focused {
background(lightBlue)
}
},
onClick = { },
content = {
BaseText("Open in Studio", style = {
contentColor(Color.Black)
fontSize(26.sp)
textAlign(TextAlign.Center)
})
}
)
}
// [END android_compose_styles_state_basic_combined_states]
val baseGradientButtonStyle = Style {
contentPadding(16.dp)
externalPadding(64.dp)
fontSize(16.sp)
shape(RoundedCornerShape(16.dp))
clip(true)
background(Brush.linearGradient(listOf(lightPurple, lightBlue)))
}
// [START android_compose_styles_state_custom_state_gradient]
@Composable
private fun GradientButton(
onClick: () -> Unit,
modifier: Modifier = Modifier,
style: Style = Style,
enabled: Boolean = true,
interactionSource: MutableInteractionSource? = null,
content: @Composable RowScope.() -> Unit,
) {
val interactionSource = interactionSource ?: remember { MutableInteractionSource() }
val styleState = rememberUpdatedStyleState(interactionSource) {
it.isEnabled = enabled
}
Row(
modifier =
modifier
.clickable(
onClick = onClick,
enabled = enabled,
interactionSource = interactionSource,
indication = null,
)
.styleable(styleState, baseGradientButtonStyle then style),
content = content,
)
}
// [END android_compose_styles_state_custom_state_gradient]
// [START android_compose_styles_state_override]
@Preview
@Composable
fun LoginButton() {
val loginButtonStyle = Style {
pressed {
background(
Brush.linearGradient(
listOf(Color.Magenta, Color.Red)
)
)
}
}
GradientButton(onClick = {
// Login logic
}, style = loginButtonStyle) {
BaseText("Login")
}
}
// [END android_compose_styles_state_override]
// [START android_compose_styles_animate_style_basic]
val animatingStyle = Style {
externalPadding(48.dp)
border(3.dp, Color.Black)
background(Color.White)
size(100.dp)
pressed {
animate {
borderColor(Color.Magenta)
background(Color(0xFFB39DDB))
}
}
}
@Preview
@Composable
private fun AnimatingStyleChanges() {
val interactionSource = remember { MutableInteractionSource() }
val styleState = remember(interactionSource) { MutableStyleState(interactionSource) }
Box(modifier = Modifier
.clickable(
interactionSource,
enabled = true,
indication = null,
onClick = {
}
)
.styleable(styleState, animatingStyle)) {
}
}
// [END android_compose_styles_animate_style_basic]
// [START android_compose_styles_animate_style_set_spec]
val animatingStyleSpec = Style {
externalPadding(48.dp)
border(3.dp, Color.Black)
background(Color.White)
size(100.dp)
transformOrigin(TransformOrigin.Center)
pressed {
animate {
borderColor(Color.Magenta)
background(Color(0xFFB39DDB))
}
animate(spring(dampingRatio = Spring.DampingRatioMediumBouncy)) {
scale(1.2f)
}
}
}
@Preview(showBackground = true)
@Composable
fun AnimatingStyleChangesSpec() {
val interactionSource = remember { MutableInteractionSource() }
val styleState = remember(interactionSource) { MutableStyleState(interactionSource) }
Box(modifier = Modifier
.clickable(
interactionSource,
enabled = true,
indication = null,
onClick = {
}
)
.styleable(styleState, animatingStyleSpec))
}
// [END android_compose_styles_animate_style_set_spec]