Companion
companion object Companion : Modifier
kotlin.Any | |
↳ | androidx.compose.ui.Modifier.Companion |
The companion object Modifier
is the empty, default, or starter Modifier
that contains no elements. Use it to create a new Modifier using
modifier extension factory functions:
import androidx.compose.foundation.background import androidx.compose.foundation.layout.padding import androidx.compose.material.Text Text( "Hello, World!", Modifier.padding(16.dp) // Outer padding; outside background .background(color = Color.Green) // Solid element background color .padding(16.dp) // Inner padding; inside background, around text )or as the default value for Modifier parameters:
import androidx.compose.foundation.layout.Column import androidx.compose.foundation.layout.padding @Composable fun PaddedColumn(modifier: Modifier = Modifier) { Column(modifier.padding(10.dp)) { // ... } }
Summary
Public methods | |
---|---|
Boolean |
all(predicate: (Modifier.Element) -> Boolean) Returns |
Boolean |
any(predicate: (Modifier.Element) -> Boolean) Returns |
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. |
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. |
infix Modifier |
Concatenates this modifier with another. |
String |
toString() |
Public methods
all
fun all(predicate: (Modifier.Element) -> Boolean): Boolean
Returns true
if predicate returns true for all Elements in this Modifier or if
this Modifier contains no Elements.
any
fun any(predicate: (Modifier.Element) -> Boolean): Boolean
Returns true
if predicate returns true for any Element in this Modifier.
foldIn
fun <R> foldIn(
initial: R,
operation: (R, Modifier.Element) -> R
): 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 +
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.
foldOut
fun <R> foldOut(
initial: R,
operation: (Modifier.Element, R) -> 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 +
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.
then
infix fun then(other: Modifier): Modifier
Concatenates this modifier with another.
Returns a Modifier representing this modifier followed by other in sequence.
toString
fun toString(): String