LayoutModifier

Kotlin |Java

interface LayoutModifier : Modifier.Element

androidx.ui.core.LayoutModifier

A Modifier.Element that changes the way a UI component is measured and laid out.

Summary

Public methods
open IntPx	DensityScope.maxIntrinsicHeightOf(measurable: Measurable, width: IntPx) Determines the modified maximum intrinsic height of measurable.
open IntPx	DensityScope.maxIntrinsicWidthOf(measurable: Measurable, height: IntPx) Determines the modified maximum intrinsic width of measurable.
open IntPx	DensityScope.minIntrinsicHeightOf(measurable: Measurable, width: IntPx) Determines the modified minimum intrinsic height of measurable.
open IntPx	DensityScope.minIntrinsicWidthOf(measurable: Measurable, height: IntPx) Determines the modified minimum intrinsic width of measurable.
open IntPx?	DensityScope.modifyAlignmentLine(line: AlignmentLine, value: IntPx?) Returns the modified position of line given its unmodified value.
open Constraints	DensityScope.modifyConstraints(constraints: Constraints) Modifies constraints for performing measurement of the modified layout element.
open Any?	DensityScope.modifyParentData(parentData: Any?) Provides a parentData given the parentData already provided through the modifier's chain.
open IntPxPosition	DensityScope.modifyPosition(childPosition: IntPxPosition, childSize: IntPxSize, containerSize: IntPxSize) Returns the position of a modified child of size childSize within a container of size containerSize.
open IntPxSize	DensityScope.modifySize(constraints: Constraints, childSize: IntPxSize) Returns the container size of a modified layout element given the original container measurement constraints and the measured childSize.

Inherited functions
From class Element R foldIn(initial: R, operation: (R, Modifier.Element) -> R) Accumulates a value starting with initial and applying operation to the current value and each element from outside in. Elements wrap one another in a chain from left to right; an Element that appears to the left of another in a wraps expression or in operation's parameter order affects all of the elements that appear after it. foldIn may be used to accumulate a value starting from the parent or head of the modifier chain to the final wrapped child. R foldOut(initial: R, operation: (Modifier.Element, R) -> R) Accumulates a value starting with initial and applying operation to the current value and each element from inside out. Elements wrap one another in a chain from left to right; an Element that appears to the left of another in a wraps expression or in operation's parameter order affects all of the elements that appear after it. foldOut may be used to accumulate a value starting from the child or tail of the modifier chain up to the parent or head of the chain.
From class Modifier Modifier wraps(other: Modifier) Wraps another Modifier with this one, returning the new chain.

Public methods

maxIntrinsicHeightOf

open fun DensityScope.maxIntrinsicHeightOf(
    measurable: Measurable, 
    width: IntPx
): IntPx

Determines the modified maximum intrinsic height of measurable. See Measurable.maxIntrinsicHeight.

maxIntrinsicWidthOf

open fun DensityScope.maxIntrinsicWidthOf(
    measurable: Measurable, 
    height: IntPx
): IntPx

Determines the modified maximum intrinsic width of measurable. See Measurable.maxIntrinsicWidth.

minIntrinsicHeightOf

open fun DensityScope.minIntrinsicHeightOf(
    measurable: Measurable, 
    width: IntPx
): IntPx

Determines the modified minimum intrinsic height of measurable. See Measurable.minIntrinsicHeight.

minIntrinsicWidthOf

open fun DensityScope.minIntrinsicWidthOf(
    measurable: Measurable, 
    height: IntPx
): IntPx

Determines the modified minimum intrinsic width of measurable. See Measurable.minIntrinsicWidth.

modifyAlignmentLine

open fun DensityScope.modifyAlignmentLine(
    line: AlignmentLine, 
    value: IntPx?
): IntPx?

Returns the modified position of line given its unmodified value.

modifyConstraints

open fun DensityScope.modifyConstraints(constraints: Constraints): Constraints

Modifies constraints for performing measurement of the modified layout element.

modifyParentData

open fun DensityScope.modifyParentData(parentData: Any?): Any?

Provides a parentData given the parentData already provided through the modifier's chain.

modifyPosition

open fun DensityScope.modifyPosition(
    childPosition: IntPxPosition, 
    childSize: IntPxSize, 
    containerSize: IntPxSize
): IntPxPosition

Returns the position of a modified child of size childSize within a container of size containerSize.

modifySize

open fun DensityScope.modifySize(
    constraints: Constraints, 
    childSize: IntPxSize
): IntPxSize

Returns the container size of a modified layout element given the original container measurement constraints and the measured childSize.