| /* |
| * 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.animateContentSize |
| import androidx.compose.animation.core.tween |
| import androidx.compose.foundation.background |
| import androidx.compose.foundation.clickable |
| import androidx.compose.foundation.layout.Box |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.Spacer |
| import androidx.compose.foundation.layout.aspectRatio |
| import androidx.compose.foundation.layout.fillMaxWidth |
| import androidx.compose.foundation.layout.height |
| import androidx.compose.foundation.layout.padding |
| import androidx.compose.foundation.layout.sizeIn |
| import androidx.compose.foundation.layout.wrapContentHeight |
| import androidx.compose.foundation.layout.wrapContentSize |
| import androidx.compose.foundation.shape.RoundedCornerShape |
| import androidx.compose.material.Button |
| import androidx.compose.material.LocalTextStyle |
| 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.Modifier |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.unit.dp |
| |
| @Composable |
| fun AnimateContentSizeDemo() { |
| Column( |
| Modifier.wrapContentHeight() |
| .padding(50.dp) |
| .background(Color.Gray) |
| .fillMaxWidth() |
| .padding(50.dp) |
| ) { |
| Text() |
| Spacer(Modifier.height(20.dp)) |
| Button() |
| Spacer(Modifier.height(20.dp)) |
| Image() |
| } |
| } |
| |
| @Composable |
| private fun Text() { |
| val shortText = "Click me" |
| val longText = "Very long text\nthat spans across\nmultiple lines" |
| var short by remember { mutableStateOf(true) } |
| Box( |
| modifier = Modifier |
| .background( |
| Color.Blue, |
| RoundedCornerShape(15.dp) |
| ) |
| .clickable { short = !short } |
| .padding(20.dp) |
| .wrapContentSize() |
| .animateContentSize { startSize, endSize -> println("$startSize -> $endSize") } |
| ) { |
| Text( |
| if (short) { |
| shortText |
| } else { |
| longText |
| }, |
| style = LocalTextStyle.current.copy(color = Color.White) |
| ) |
| } |
| } |
| |
| @Composable |
| private fun Button() { |
| val shortText = "Short" |
| val longText = "Very loooooong text" |
| var short by remember { mutableStateOf(true) } |
| Button( |
| { short = !short } |
| ) { |
| Text( |
| if (short) { |
| shortText |
| } else { |
| longText |
| }, |
| style = LocalTextStyle.current.copy(color = Color.White), |
| modifier = Modifier.animateContentSize() |
| ) |
| } |
| } |
| |
| @Composable |
| private fun Image() { |
| var portraitMode by remember { mutableStateOf(true) } |
| Box( |
| Modifier.clickable { portraitMode = !portraitMode } |
| .sizeIn(maxWidth = 300.dp, maxHeight = 300.dp) |
| .background(if (portraitMode) Color(0xFFfffbd0) else Color(0xFFe3ffd9)) |
| .animateContentSize(tween(500)) |
| .aspectRatio(if (portraitMode) 3 / 4f else 16 / 9f) |
| ) { |
| Text( |
| if (portraitMode) { |
| "3 : 4" |
| } else { |
| "16 : 9" |
| }, |
| style = LocalTextStyle.current.copy(color = Color.Black) |
| ) |
| } |
| } |