| /* |
| * 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.ui.core.samples |
| |
| import androidx.annotation.Sampled |
| import androidx.compose.Composable |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.globalPosition |
| import androidx.ui.core.onChildPositioned |
| import androidx.ui.core.onPositioned |
| import androidx.ui.core.positionInRoot |
| import androidx.compose.foundation.Box |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.ui.unit.dp |
| |
| @Sampled |
| @Composable |
| fun OnPositionedSample() { |
| Column(Modifier.onPositioned { coordinates -> |
| // This will be the size of the Column. |
| coordinates.size |
| // The position of the Column relative to the application window. |
| coordinates.globalPosition |
| // The position of the Column relative to the Compose root. |
| coordinates.positionInRoot |
| // These will be the alignment lines provided to the layout (empty here for Column). |
| coordinates.providedAlignmentLines |
| // This will a LayoutCoordinates instance corresponding to the parent of Column. |
| coordinates.parentCoordinates |
| }) { |
| Box(Modifier.preferredSize(20.dp), backgroundColor = Color.Green) |
| Box(Modifier.preferredSize(20.dp), backgroundColor = Color.Blue) |
| } |
| } |
| |
| @Sampled |
| @Composable |
| fun OnChildPositionedSample() { |
| Column(Modifier.onChildPositioned { coordinates -> |
| // This will be the size of the child SizedRectangle. |
| coordinates.size |
| // The position of the SizedRectangle relative to the application window. |
| coordinates.globalPosition |
| // The position of the SizedRectangle relative to the Compose root. |
| coordinates.positionInRoot |
| // These will be the alignment lines provided to the layout (empty for SizedRectangle) |
| coordinates.providedAlignmentLines |
| // This will a LayoutCoordinates instance corresponding to the Column. |
| coordinates.parentCoordinates |
| }) { |
| Box(Modifier.preferredSize(20.dp), backgroundColor = Color.Green) |
| } |
| } |