| /* |
| * Copyright 2020 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 |
| * |
| * http://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. |
| */ |
| |
| package androidx.compose.animation.samples |
| |
| import androidx.compose.animation.core.AnimationVector2D |
| import androidx.compose.animation.core.TwoWayConverter |
| import androidx.annotation.Sampled |
| import androidx.compose.Composable |
| import androidx.compose.remember |
| import androidx.compose.animation.animate |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.drawOpacity |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.ContentGravity |
| import androidx.compose.foundation.Text |
| import androidx.compose.foundation.background |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.ui.unit.Dp |
| import androidx.ui.unit.dp |
| |
| enum class VisibilityState { |
| Visible, |
| Invisible |
| } |
| |
| @Sampled |
| @Composable |
| fun VisibilityTransition(visibility: VisibilityState) { |
| Box(Modifier.fillMaxSize(), gravity = ContentGravity.Center) { |
| val opacity = animate(if (visibility == VisibilityState.Invisible) 0f else 1f) |
| Text("Visibility Transition", modifier = Modifier.drawOpacity(opacity)) |
| } |
| } |
| |
| @Sampled |
| @Composable |
| fun ColorTransition(enabled: Boolean) { |
| Box(Modifier.fillMaxSize(), gravity = ContentGravity.Center) { |
| val textColor = animate(if (enabled) Color.Black else Color.Gray) |
| Text("Visibility Transition", color = textColor) |
| } |
| } |
| |
| data class MySize(val width: Dp, val height: Dp) |
| |
| @Sampled |
| @Composable |
| fun ArbitraryValueTypeTransition(enabled: Boolean) { |
| val mySize = remember(enabled) { |
| if (enabled) { |
| MySize(500.dp, 500.dp) |
| } else { |
| MySize(100.dp, 100.dp) |
| } |
| } |
| val animSize = animate<MySize, AnimationVector2D>(mySize, TwoWayConverter( |
| convertToVector = { AnimationVector2D(it.width.value, it.height.value) }, |
| convertFromVector = { MySize(it.v1.dp, it.v2.dp) } |
| )) |
| Box(Modifier.preferredSize(animSize.width, animSize.height).background(color = Color.Red)) |
| } |