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Allow for a smooth rotation while running the app. Replaced the quick…
…-settings lazy grid with a FlowRow as the grid was depending on screenWidth instead of constraints. Open issues: - Surface aspect ratio breaks when in non-initial orientation. - small flash sometimes when doing orientation change
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118 changes: 118 additions & 0 deletions
118
feature/preview/src/main/java/com/google/jetpackcamera/feature/preview/ui/RotationUtil.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /* | ||
| * Copyright (C) 2024 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 com.google.jetpackcamera.feature.preview.ui | ||
|
|
||
| import android.content.Context | ||
| import android.content.ContextWrapper | ||
| import android.os.Build | ||
| import android.view.Surface | ||
| import android.view.WindowManager | ||
| import android.view.WindowManager.LayoutParams.ROTATION_ANIMATION_JUMPCUT | ||
| import android.view.WindowManager.LayoutParams.ROTATION_ANIMATION_SEAMLESS | ||
| import androidx.activity.ComponentActivity | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.DisposableEffect | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableIntStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.layout.layout | ||
| import androidx.compose.ui.platform.LocalConfiguration | ||
| import androidx.compose.ui.platform.LocalView | ||
| import androidx.compose.ui.unit.Constraints | ||
| import androidx.core.view.WindowCompat | ||
| import androidx.core.view.WindowInsetsCompat | ||
| import androidx.core.view.WindowInsetsControllerCompat | ||
|
|
||
| /** | ||
| * As long as this composable is active, the window will go into immersive mode and prevents the | ||
| * rotation animation on configuration change. This will prevent the UI items from visually changing. | ||
| * | ||
| * When used in combination with a composable that renders the same UI in both landscape and portrait, | ||
| * it can create a smooth continuous feel between those two orientations. | ||
| */ | ||
| @Composable | ||
| fun SmoothImmersiveRotationEffect(context: Context) = DisposableEffect(context) { | ||
| var currentRotationAnimation: Int? = null | ||
| context.getActivity()?.window?.let { window -> | ||
| window.attributes = window.attributes.apply { | ||
| currentRotationAnimation = rotationAnimation | ||
| rotationAnimation = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { | ||
| ROTATION_ANIMATION_SEAMLESS | ||
| } else { | ||
| ROTATION_ANIMATION_JUMPCUT | ||
| } | ||
| } | ||
| WindowCompat.getInsetsController(window, window.decorView).apply { | ||
| systemBarsBehavior = | ||
| WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE | ||
| hide(WindowInsetsCompat.Type.systemBars()) | ||
| } | ||
| } | ||
| onDispose { | ||
| context.getActivity()?.window?.let { window -> | ||
| if (currentRotationAnimation != null) { | ||
| window.attributes = window.attributes.apply { | ||
| rotationAnimation = WindowManager.LayoutParams.ROTATION_ANIMATION_ROTATE | ||
| } | ||
| } | ||
| WindowCompat.getInsetsController(window, window.decorView).apply { | ||
| show(WindowInsetsCompat.Type.systemBars()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Rotate a layout based on the current screen orientation. The UI will always be laid out in a way | ||
| * that width <= height, and rotated afterwards. | ||
| */ | ||
| @Composable | ||
| fun Modifier.rotatedLayout(): Modifier { | ||
| var currentOrientation by remember { mutableIntStateOf(Surface.ROTATION_0) } | ||
| val currentDegrees = currentOrientation * 90f | ||
| val newOrientation = LocalConfiguration.current.orientation | ||
| val display = LocalView.current.display | ||
| LaunchedEffect(newOrientation, display) { | ||
| val newRotation = display.rotation | ||
| if (currentOrientation != newRotation) { | ||
| currentOrientation = newRotation | ||
| } | ||
| } | ||
| return this then Modifier.fillMaxSize().layout { measurable, constraints -> | ||
| val height = maxOf(constraints.maxWidth, constraints.maxHeight) | ||
| val width = minOf(constraints.maxWidth, constraints.maxHeight) | ||
| val placeable = measurable.measure( | ||
| Constraints.fixed(width, height) | ||
| ) | ||
| layout(placeable.width, placeable.height) { | ||
| placeable.placeWithLayer(0, 0) { | ||
| if (constraints.maxWidth > constraints.maxHeight) { | ||
| rotationZ = -currentDegrees | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private fun Context.getActivity(): ComponentActivity? = when (this) { | ||
| is ComponentActivity -> this | ||
| is ContextWrapper -> baseContext.getActivity() | ||
| else -> null | ||
| } |
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