| /* |
| * 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.foundation.layout.samples |
| |
| import androidx.annotation.Sampled |
| import androidx.compose.Composable |
| import androidx.ui.core.Alignment |
| import androidx.compose.foundation.text.FirstBaseline |
| import androidx.ui.core.Modifier |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.Text |
| import androidx.compose.foundation.background |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.foundation.layout.Row |
| import androidx.compose.foundation.layout.fillMaxHeight |
| import androidx.compose.foundation.layout.preferredHeight |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.compose.ui.unit.dp |
| |
| @Sampled |
| @Composable |
| fun SimpleRow() { |
| Row { |
| // The child with no weight will have the specified size. |
| Box(Modifier.preferredSize(40.dp, 80.dp), backgroundColor = Color.Magenta) |
| // Has weight, the child will occupy half of the remaining width. |
| Box(Modifier.preferredHeight(40.dp).weight(1f), backgroundColor = Color.Yellow) |
| // Has weight and does not fill, the child will occupy at most half of the remaining width. |
| // Therefore it will occupy 80.dp (its preferred width) if the assigned width is larger. |
| Box( |
| Modifier.preferredSize(80.dp, 40.dp).weight(1f, fill = false), |
| backgroundColor = Color.Green |
| ) |
| } |
| } |
| |
| @Sampled |
| @Composable |
| fun SimpleGravityInRow() { |
| Row(Modifier.fillMaxHeight()) { |
| // The child with no gravity modifier is positioned by default so that its top edge is |
| // aligned to the top of the vertical axis. |
| Box(Modifier.preferredSize(80.dp, 40.dp), backgroundColor = Color.Magenta) |
| // Gravity.Top, the child will be positioned so that its top edge is aligned to the top |
| // of the vertical axis. |
| Box( |
| Modifier.preferredSize(80.dp, 40.dp) |
| .gravity(Alignment.Top), |
| backgroundColor = Color.Red |
| ) |
| // Gravity.Center, the child will be positioned so that its center is in the middle of |
| // the vertical axis. |
| Box( |
| Modifier.preferredSize(80.dp, 40.dp) |
| .gravity(Alignment.CenterVertically), |
| backgroundColor = Color.Yellow |
| ) |
| // Gravity.Bottom, the child will be positioned so that its bottom edge is aligned to the |
| // bottom of the vertical axis. |
| Box( |
| Modifier.preferredSize(80.dp, 40.dp) |
| .gravity(Alignment.Bottom), |
| backgroundColor = Color.Green |
| ) |
| } |
| } |
| |
| @Sampled |
| @Composable |
| fun SimpleRelativeToSiblingsInRow() { |
| Row(Modifier.fillMaxHeight()) { |
| // Center of the colored rectangle is aligned to first baseline of the text. |
| Box( |
| backgroundColor = Color.Red, |
| modifier = Modifier.preferredSize(80.dp, 40.dp) |
| .alignWithSiblings { it.height / 2 } |
| ) |
| Text( |
| text = "Text.", |
| modifier = Modifier.alignWithSiblings(FirstBaseline).background(color = Color.Cyan) |
| ) |
| } |
| } |