| /* |
| * Copyright 2018 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 |
| |
| import androidx.compose.Composable |
| import androidx.ui.graphics.Canvas |
| import androidx.ui.tooling.InspectionMode |
| import androidx.ui.unit.Density |
| import androidx.ui.unit.PxSize |
| |
| /** |
| * Use Draw to get a [Canvas] to paint into the parent. |
| * |
| * Example usage: |
| * @sample androidx.ui.framework.samples.DrawSample |
| * |
| * The [onPaint] lambda uses a [Density] receiver scope, to allow easy translation |
| * between [Dp], [Sp], and [Px]. The `parentSize` parameter indicates the layout size of |
| * the parent. |
| */ |
| @Suppress("NOTHING_TO_INLINE") |
| @Composable |
| inline fun Draw( |
| noinline onPaint: Density.(canvas: Canvas, parentSize: PxSize) -> Unit |
| ) { |
| // Hide the internals of DrawNode |
| if (InspectionMode.current) { |
| RepaintBoundaryNode(name = null) { |
| DrawNode(onPaint = onPaint) |
| } |
| } else { |
| DrawNode(onPaint = onPaint) |
| } |
| } |
| |
| /** |
| * A Draw scope that accepts children to allow modifying the canvas for children. |
| * The [children] are drawn when [DrawReceiver.drawChildren] is called. |
| * If the [onPaint] does not call [DrawReceiver.drawChildren] then it will be called |
| * after the lambda. |
| * |
| * Example usage: |
| * @sample androidx.ui.framework.samples.DrawWithChildrenSample |
| */ |
| @Composable |
| inline fun Draw( |
| crossinline children: @Composable() () -> Unit, |
| noinline onPaint: DrawReceiver.(canvas: Canvas, parentSize: PxSize) -> Unit |
| ) { |
| // Hide the internals of DrawNode |
| if (InspectionMode.current) { |
| RepaintBoundaryNode(name = null) { |
| DrawNode(onPaintWithChildren = onPaint) { |
| children() |
| } |
| } |
| } else { |
| DrawNode(onPaintWithChildren = onPaint) { |
| children() |
| } |
| } |
| } |