DelegatableNode

interface DelegatableNode

Represents a Modifier.Node which can be a delegate of another Modifier.Node. Since Modifier.Node implements this interface, in practice any Modifier.Node can be delegated.

Properties

val node: Modifier.Node

A reference of the Modifier.Node that holds this node's position in the node hierarchy. If the node is a delegate of another node, this will point to the root delegating node that is actually part of the node tree. Otherwise, this will point to itself.

Functions

fun onDensityChange()

Invoked when the density changes for this node. This affects Dp to pixel conversions, and can cause coordinates / other values to change.

Changes to density will automatically invalidate layout / draw modifiers, as layout, measurement, and draw depend on density. This callback can be used to update any other node state that depends on density, outside of these phases. Density can be retrieved inside a node by using androidx.compose.ui.node.requireDensity.

fun onLayoutDirectionChange()

Invoked when the layout direction changes for this node. This can affect the layout and drawing of nodes.

Changes to layout direction will automatically invalidate layout / draw modifiers, as layout, measurement, and draw depend on layout direction. This callback can be used to update any other node state that depends on layout direction, outside of these phases. Layout direction can be retrieved inside a node by using androidx.compose.ui.node.requireLayoutDirection.