| /* |
| * Copyright 2019 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.foundation |
| |
| import android.app.Dialog |
| import android.view.MotionEvent |
| import android.view.View |
| import android.view.Window |
| import android.widget.FrameLayout |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.Composition |
| import androidx.compose.runtime.CompositionReference |
| import androidx.compose.runtime.ExperimentalComposeApi |
| import androidx.compose.runtime.Recomposer |
| import androidx.compose.runtime.compositionReference |
| import androidx.compose.runtime.currentComposer |
| import androidx.compose.runtime.onActive |
| import androidx.compose.runtime.onCommit |
| import androidx.compose.runtime.remember |
| import androidx.lifecycle.ViewTreeLifecycleOwner |
| import androidx.lifecycle.ViewTreeViewModelStoreOwner |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.ViewAmbient |
| import androidx.ui.core.semantics.semantics |
| import androidx.ui.core.setContent |
| import androidx.compose.foundation.semantics.dialog |
| |
| /** |
| * Opens a dialog with the given content. |
| * |
| * The dialog is visible as long as it is part of the composition hierarchy. |
| * In order to let the user dismiss the Dialog, the implementation of [onCloseRequest] should |
| * contain a way to remove to remove the dialog from the composition hierarchy. |
| * |
| * Example usage: |
| * |
| * @sample androidx.compose.foundation.samples.DialogSample |
| * |
| * @param onCloseRequest Executes when the user tries to dismiss the Dialog. |
| * @param children The content to be displayed inside the dialog. |
| */ |
| @Composable |
| actual fun Dialog(onCloseRequest: () -> Unit, children: @Composable () -> Unit) { |
| val view = ViewAmbient.current |
| |
| @OptIn(ExperimentalComposeApi::class) |
| val recomposer = currentComposer.recomposer |
| // The recomposer can't change. |
| val dialog = remember(view) { DialogWrapper(view, recomposer) } |
| dialog.onCloseRequest = onCloseRequest |
| |
| onActive { |
| dialog.show() |
| |
| onDispose { |
| dialog.dismiss() |
| dialog.disposeComposition() |
| } |
| } |
| |
| val composition = compositionReference() |
| onCommit { |
| dialog.setContent(composition) { |
| // TODO(b/159900354): draw a scrim and add margins around the Compose Dialog, and |
| // consume clicks so they can't pass through to the underlying UI |
| Box(Modifier.semantics { this.dialog() }, children = children) |
| } |
| } |
| } |
| |
| private class DialogWrapper( |
| composeView: View, |
| private val recomposer: Recomposer |
| ) : Dialog(composeView.context) { |
| lateinit var onCloseRequest: () -> Unit |
| |
| private val frameLayout = FrameLayout(context) |
| private var composition: Composition? = null |
| |
| init { |
| window!!.requestFeature(Window.FEATURE_NO_TITLE) |
| window!!.setBackgroundDrawableResource(android.R.color.transparent) |
| setContentView(frameLayout) |
| ViewTreeLifecycleOwner.set(frameLayout, ViewTreeLifecycleOwner.get(composeView)) |
| ViewTreeViewModelStoreOwner.set(frameLayout, ViewTreeViewModelStoreOwner.get(composeView)) |
| } |
| |
| // TODO(b/159900354): Make the Android Dialog full screen and the scrim fully transparent |
| |
| fun setContent(parentComposition: CompositionReference, children: @Composable () -> Unit) { |
| // TODO: This should probably create a child composition of the original |
| composition = frameLayout.setContent(recomposer, parentComposition, children) |
| } |
| |
| fun disposeComposition() { |
| composition?.dispose() |
| } |
| |
| override fun onTouchEvent(event: MotionEvent): Boolean { |
| val result = super.onTouchEvent(event) |
| if (result) { |
| onCloseRequest() |
| } |
| |
| return result |
| } |
| |
| override fun cancel() { |
| // Prevents the dialog from dismissing itself |
| return |
| } |
| |
| override fun onBackPressed() { |
| onCloseRequest() |
| } |
| } |