Offset
@Immutable inline class Offset
kotlin.Any | |
↳ | androidx.compose.ui.geometry.Offset |
An immutable 2D floating-point offset.
Generally speaking, Offsets can be interpreted in two ways:
- As representing a point in Cartesian space a specified distance from a separately-maintained origin. For example, the top-left position of children in the RenderBox protocol is typically represented as an Offset from the top left of the parent box.
- As a vector that can be applied to coordinates. For example, when painting a RenderObject, the parent is passed an Offset from the screen's origin which it can add to the offsets of its children to find the Offset from the screen's origin to each of the children.
Because a particular Offset can be interpreted as one sense at one time then as the other sense at a later time, the same class is used for both senses.
See also:
- Size, which represents a vector describing the size of a rectangle.
Creates an offset. The first argument sets x, the horizontal component, and the second sets y, the vertical component.
Summary
Public constructors | |
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An immutable 2D floating-point offset. |
Public methods | |
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operator Float | |
operator Float | |
Offset |
Returns a copy of this Offset instance optionally overriding the x or y parameter |
operator Offset |
Division operator. |
Float |
The magnitude of the offset. |
Float |
The square of the magnitude of the offset. |
Boolean |
isValid() |
operator Offset |
Binary subtraction operator. |
operator Offset |
Binary addition operator. |
operator Offset |
Modulo (remainder) operator. |
operator Offset |
Multiplication operator. |
String |
toString() |
operator Offset |
Unary negation operator. |
Extension functions | ||||||
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From androidx.compose.ui.unit
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From androidx.compose.ui.geometry
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Properties | |
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Long | |
Float | |
Float |
Companion properties | |
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Offset |
An offset with infinite x and y components. |
Offset |
Represents an unspecified Offset value, usually a replacement for |
Offset |
An offset with zero magnitude. |
Extension properties | ||||||
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From androidx.compose.ui.geometry
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Public constructors
<init>
Offset(packedValue: Long)
An immutable 2D floating-point offset.
Generally speaking, Offsets can be interpreted in two ways:
- As representing a point in Cartesian space a specified distance from a separately-maintained origin. For example, the top-left position of children in the RenderBox protocol is typically represented as an Offset from the top left of the parent box.
- As a vector that can be applied to coordinates. For example, when painting a RenderObject, the parent is passed an Offset from the screen's origin which it can add to the offsets of its children to find the Offset from the screen's origin to each of the children.
Because a particular Offset can be interpreted as one sense at one time then as the other sense at a later time, the same class is used for both senses.
See also:
- Size, which represents a vector describing the size of a rectangle.
Creates an offset. The first argument sets x, the horizontal component, and the second sets y, the vertical component.
Public methods
component1
@Stable operator fun component1(): Float
component2
@Stable operator fun component2(): Float
copy
fun copy(
x: Float = this.x,
y: Float = this.y
): Offset
Returns a copy of this Offset instance optionally overriding the x or y parameter
div
@Stable operator fun div(operand: Float): Offset
Division operator.
Returns an offset whose coordinates are the coordinates of the left-hand-side operand (an Offset) divided by the scalar right-hand-side operand (a Float).
getDistance
@Stable fun getDistance(): Float
The magnitude of the offset.
If you need this value to compare it to another Offset's distance, consider using getDistanceSquared instead, since it is cheaper to compute.
getDistanceSquared
@Stable fun getDistanceSquared(): Float
The square of the magnitude of the offset.
This is cheaper than computing the getDistance itself.
isValid
@Stable fun isValid(): Boolean
minus
@Stable operator fun minus(other: Offset): Offset
Binary subtraction operator.
Returns an offset whose x value is the left-hand-side operand's x minus the right-hand-side operand's x and whose y value is the left-hand-side operand's y minus the right-hand-side operand's y.
plus
@Stable operator fun plus(other: Offset): Offset
Binary addition operator.
Returns an offset whose x value is the sum of the x values of the two operands, and whose y value is the sum of the y values of the two operands.
rem
@Stable operator fun rem(operand: Float): Offset
Modulo (remainder) operator.
Returns an offset whose coordinates are the remainder of dividing the coordinates of the left-hand-side operand (an Offset) by the scalar right-hand-side operand (a Float).
times
@Stable operator fun times(operand: Float): Offset
Multiplication operator.
Returns an offset whose coordinates are the coordinates of the left-hand-side operand (an Offset) multiplied by the scalar right-hand-side operand (a Float).
toString
fun toString(): String
unaryMinus
@Stable operator fun unaryMinus(): Offset
Unary negation operator.
Returns an offset with the coordinates negated.
If the Offset represents an arrow on a plane, this operator returns the same arrow but pointing in the reverse direction.
Properties
packedValue
val packedValue: Long
x
@Stable val x: Float
y
@Stable val y: Float
Companion properties
Infinite
@Stable val Infinite: Offset
An offset with infinite x and y components.
See also:
- isInfinite, which checks whether either component is infinite.
- isFinite, which checks whether both components are finite.
Unspecified
@Stable val Unspecified: Offset
Represents an unspecified Offset value, usually a replacement for null
when a primitive value is desired.
Zero
@Stable val Zero: Offset
An offset with zero magnitude.
This can be used to represent the origin of a coordinate space.