| /* |
| * 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.demos |
| |
| import androidx.compose.animation.core.AnimationState |
| import androidx.compose.animation.core.Spring |
| import androidx.compose.animation.core.animateTo |
| import androidx.compose.animation.core.isFinished |
| import androidx.compose.animation.core.spring |
| import androidx.compose.foundation.MutatorMutex |
| import androidx.compose.foundation.background |
| import androidx.compose.foundation.gestures.awaitFirstDown |
| import androidx.compose.foundation.layout.Box |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.foundation.layout.offset |
| import androidx.compose.foundation.layout.size |
| import androidx.compose.foundation.shape.CircleShape |
| import androidx.compose.material.Text |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.getValue |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.remember |
| import androidx.compose.runtime.setValue |
| import androidx.compose.ui.Alignment |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.input.pointer.pointerInput |
| import androidx.compose.ui.unit.dp |
| import kotlinx.coroutines.coroutineScope |
| import kotlinx.coroutines.launch |
| |
| @Composable |
| fun SuspendAnimationDemo() { |
| var animStateX by remember { |
| mutableStateOf(AnimationState(0f)) |
| } |
| var animStateY by remember { |
| mutableStateOf(AnimationState(0f)) |
| } |
| val mutex = remember { MutatorMutex() } |
| |
| Box( |
| Modifier.fillMaxSize().background(Color(0xffb99aff)).pointerInput { |
| coroutineScope { |
| while (true) { |
| val offset = handlePointerInput { |
| awaitFirstDown().current.position |
| } |
| val x = offset.x |
| val y = offset.y |
| mutex.mutate { |
| launch { |
| animStateX.animateTo( |
| x, |
| sequentialAnimation = !animStateX.isFinished, |
| animationSpec = spring(stiffness = Spring.StiffnessLow) |
| ) |
| } |
| launch { |
| animStateY.animateTo( |
| y, |
| sequentialAnimation = !animStateY.isFinished, |
| animationSpec = spring(stiffness = Spring.StiffnessLow) |
| ) |
| } |
| } |
| } |
| } |
| } |
| ) { |
| Text("Tap anywhere", Modifier.align(Alignment.Center)) |
| Box( |
| Modifier.offset({ animStateX.value }, { animStateY.value }).size(40.dp) |
| .background(Color(0xff3c1361), CircleShape) |
| ) |
| } |
| } |