DrawModifierNode.kt
/*
* Copyright 2022 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.ui.node
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.drawscope.ContentDrawScope
/**
* A [Modifier.Node] that draws into the space of the layout.
*
* This is the [androidx.compose.ui.Modifier.Node] equivalent of
* [androidx.compose.ui.draw.DrawModifier]
*
* @sample androidx.compose.ui.samples.DrawModifierNodeSample
*/
interface DrawModifierNode : DelegatableNode {
fun ContentDrawScope.draw()
fun onMeasureResultChanged() {}
}
/**
* Invalidates this modifier's draw layer, ensuring that a draw pass will
* be run on the next frame.
*/
fun DrawModifierNode.invalidateDraw() {
if (node.isAttached) {
requireCoordinator(Nodes.Any).invalidateLayer()
}
}