DelegatingNode

import androidx.compose.ui.Modifier
import androidx.compose.ui.input.pointer.PointerEvent
import androidx.compose.ui.input.pointer.PointerEventPass
import androidx.compose.ui.node.DelegatingNode
import androidx.compose.ui.node.PointerInputModifierNode
import androidx.compose.ui.node.SemanticsModifierNode
import androidx.compose.ui.semantics.SemanticsPropertyReceiver
import androidx.compose.ui.semantics.onClick
import androidx.compose.ui.unit.IntSize

class TapGestureNode(var onTap: () -> Unit) : PointerInputModifierNode, Modifier.Node() {
    override fun onPointerEvent(
        pointerEvent: PointerEvent,
        pass: PointerEventPass,
        bounds: IntSize,
    ) {
        // ...
    }

    override fun onCancelPointerInput() {
        // ...
    }
}
class TapGestureWithClickSemantics(onTap: () -> Unit) :
    PointerInputModifierNode, SemanticsModifierNode, DelegatingNode() {
    var onTap: () -> Unit
        get() = gesture.onTap
        set(value) {
            gesture.onTap = value
        }

    val gesture = delegate(TapGestureNode(onTap))

    override fun onPointerEvent(
        pointerEvent: PointerEvent,
        pass: PointerEventPass,
        bounds: IntSize,
    ) {
        gesture.onPointerEvent(pointerEvent, pass, bounds)
    }

    override fun onCancelPointerInput() {
        gesture.onCancelPointerInput()
    }

    override fun SemanticsPropertyReceiver.applySemantics() {
        onClick {
            gesture.onTap()
            true
        }
    }
}

import androidx.compose.ui.Modifier
import androidx.compose.ui.input.pointer.PointerEvent
import androidx.compose.ui.input.pointer.PointerEventPass
import androidx.compose.ui.node.DelegatingNode
import androidx.compose.ui.node.PointerInputModifierNode
import androidx.compose.ui.node.SemanticsModifierNode
import androidx.compose.ui.semantics.SemanticsPropertyReceiver
import androidx.compose.ui.semantics.onClick
import androidx.compose.ui.unit.IntSize

class TapGestureNode(var onTap: () -> Unit) : PointerInputModifierNode, Modifier.Node() {
    override fun onPointerEvent(
        pointerEvent: PointerEvent,
        pass: PointerEventPass,
        bounds: IntSize,
    ) {
        // ...
    }

    override fun onCancelPointerInput() {
        // ...
    }
}

class TapSemanticsNode(var onTap: () -> Unit) : SemanticsModifierNode, Modifier.Node() {
    override fun SemanticsPropertyReceiver.applySemantics() {
        onClick {
            onTap()
            true
        }
    }
}
class TapGestureWithClickSemantics(onTap: () -> Unit) : DelegatingNode() {
    var onTap: () -> Unit
        get() = gesture.onTap
        set(value) {
            gesture.onTap = value
            semantics.onTap = value
        }

    val gesture = delegate(TapGestureNode(onTap))
    val semantics = delegate(TapSemanticsNode(onTap))
}

import androidx.compose.ui.Modifier
import androidx.compose.ui.input.pointer.PointerEvent
import androidx.compose.ui.input.pointer.PointerEventPass
import androidx.compose.ui.layout.LayoutCoordinates
import androidx.compose.ui.node.DelegatingNode
import androidx.compose.ui.node.GlobalPositionAwareModifierNode
import androidx.compose.ui.node.PointerInputModifierNode
import androidx.compose.ui.node.SemanticsModifierNode
import androidx.compose.ui.semantics.SemanticsPropertyReceiver
import androidx.compose.ui.semantics.onClick
import androidx.compose.ui.unit.IntSize

class ExpensivePositionHandlingOnPointerEvents : PointerInputModifierNode, DelegatingNode() {

    val globalAwareNode =
        object : GlobalPositionAwareModifierNode, Modifier.Node() {
            override fun onGloballyPositioned(coordinates: LayoutCoordinates) {
                // ...
            }
        }

    override fun onPointerEvent(
        pointerEvent: PointerEvent,
        pass: PointerEventPass,
        bounds: IntSize,
    ) {
        // wait until first pointer event to start listening to global
        // position
        if (!globalAwareNode.isAttached) {
            delegate(globalAwareNode)
        }
        // normal input processing
    }

    override fun onCancelPointerInput() {
        // ...
    }
}

class TapGestureNode(var onTap: () -> Unit) : PointerInputModifierNode, Modifier.Node() {
    override fun onPointerEvent(
        pointerEvent: PointerEvent,
        pass: PointerEventPass,
        bounds: IntSize,
    ) {
        // ...
    }

    override fun onCancelPointerInput() {
        // ...
    }
}

class TapSemanticsNode(var onTap: () -> Unit) : SemanticsModifierNode, Modifier.Node() {
    override fun SemanticsPropertyReceiver.applySemantics() {
        onClick {
            onTap()
            true
        }
    }
}
class TapGestureWithClickSemantics(onTap: () -> Unit) : DelegatingNode() {
    var onTap: () -> Unit
        get() = gesture.onTap
        set(value) {
            gesture.onTap = value
            semantics.onTap = value
        }

    val gesture = delegate(TapGestureNode(onTap))
    val semantics = delegate(TapSemanticsNode(onTap))
}

import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.LayoutCoordinates
import androidx.compose.ui.node.DelegatingNode
import androidx.compose.ui.node.GlobalPositionAwareModifierNode

class MyModifierNode(global: Boolean) : DelegatingNode() {
    val globalAwareNode =
        object : GlobalPositionAwareModifierNode, Modifier.Node() {
                override fun onGloballyPositioned(coordinates: LayoutCoordinates) {
                    // ...
                }
            }
            .also { if (global) delegate(it) }
    var global: Boolean = global
        set(value) {
            if (global && !value) {
                undelegate(globalAwareNode)
            } else if (!global && value) {
                delegate(globalAwareNode)
            }
            field = value
        }
}

import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.LayoutCoordinates
import androidx.compose.ui.node.DelegatingNode
import androidx.compose.ui.node.GlobalPositionAwareModifierNode
import androidx.compose.ui.node.requireLayoutDirection
import androidx.compose.ui.unit.LayoutDirection

class MyModifierNode : DelegatingNode() {
    val globalAwareNode =
        object : GlobalPositionAwareModifierNode, Modifier.Node() {
            override fun onGloballyPositioned(coordinates: LayoutCoordinates) {
                // ...
            }
        }

    override fun onAttach() {
        // one can conditionally delegate in attach, for instance if certain conditions are met
        if (requireLayoutDirection() == LayoutDirection.Rtl) {
            delegate(globalAwareNode)
        }
    }
}