ChainConstrainScope.kt
/*
* Copyright (C) 2021 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.constraintlayout.compose
import androidx.compose.foundation.layout.LayoutScopeMarker
import androidx.compose.runtime.Stable
import androidx.constraintlayout.core.parser.CLObject
@LayoutScopeMarker
@Stable
class HorizontalChainScope internal constructor(
internal val id: Any,
containerObject: CLObject
) {
/**
* Reference to the [ConstraintLayout] itself, which can be used to specify constraints
* between itself and its children.
*/
val parent = ConstrainedLayoutReference("parent")
/**
* The start anchor of the chain - can be constrained using [VerticalAnchorable.linkTo].
*/
val start: VerticalAnchorable = ChainVerticalAnchorable(containerObject, -2)
/**
* The left anchor of the chain - can be constrained using [VerticalAnchorable.linkTo].
*/
val absoluteLeft: VerticalAnchorable = ChainVerticalAnchorable(containerObject, 0)
/**
* The end anchor of the chain - can be constrained using [VerticalAnchorable.linkTo].
*/
val end: VerticalAnchorable = ChainVerticalAnchorable(containerObject, -1)
/**
* The right anchor of the chain - can be constrained using [VerticalAnchorable.linkTo].
*/
val absoluteRight: VerticalAnchorable = ChainVerticalAnchorable(containerObject, 1)
}
@LayoutScopeMarker
@Stable
class VerticalChainScope internal constructor(
internal val id: Any,
containerObject: CLObject
) {
/**
* Reference to the [ConstraintLayout] itself, which can be used to specify constraints
* between itself and its children.
*/
val parent = ConstrainedLayoutReference("parent")
/**
* The top anchor of the chain - can be constrained using [HorizontalAnchorable.linkTo].
*/
val top: HorizontalAnchorable = ChainHorizontalAnchorable(containerObject, 0)
/**
* The bottom anchor of the chain - can be constrained using [HorizontalAnchorable.linkTo].
*/
val bottom: HorizontalAnchorable = ChainHorizontalAnchorable(containerObject, 1)
}
private class ChainVerticalAnchorable constructor(
containerObject: CLObject,
index: Int
) : BaseVerticalAnchorable(containerObject, index)
private class ChainHorizontalAnchorable constructor(
containerObject: CLObject,
index: Int
) : BaseHorizontalAnchorable(containerObject, index)