BoxAlignment class

Fixed-position box alignment that doesn't consider text direction.

BoxAlignment provides absolute alignment positioning where values are interpreted consistently regardless of text direction (LTR/RTL). For example, -1.0 always means left (horizontal) or top (vertical), while 1.0 always means right or bottom.

Use this when you need consistent alignment that doesn't change based on locale. For text-direction-aware alignment, use BoxAlignmentDirectional.

See also:

• BoxAlignmentDirectional, for text-direction-aware alignment
• BoxAlignmentSpacing, for spacing-based alignment

Inheritance

• Object
• BoxAlignmentGeometry
• BoxAlignmentContent
• BoxAlignmentBase
• BoxAlignment

Constructors

BoxAlignment(double value)

Creates an absolute alignment with the specified value.

const

Properties

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → double

The alignment value, where -1.0 is start, 0.0 is center, and 1.0 is end.

final

Methods

adjustSize({required ParentLayout parent, required LayoutAxis axis, required double viewportSize, required double contentSize, required double childSize}) → double?

Optionally adjusts the size of the child during alignment.

inherited

adjustSpacing({required ParentLayout parent, required LayoutAxis axis, required double viewportSize, required double contentSize, required double startSpacing, required double spacing, required double endSpacing, required int affectedCount}) → ({double additionalEndSpacing, double additionalSpacing, double additionalStartSpacing})?

Adjusts spacing between items when distributing space.

inherited

align({required ParentLayout parent, required LayoutAxis axis, required double viewportSize, required double contentSize, required double maxBaseline, required double childBaseline}) → double

Calculates the alignment position based on the value.

override

needsBaseline({required ParentLayout parent, required LayoutAxis axis}) → bool

This alignment never requires baseline information since it doesn't support baseline alignment.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Constants

baseline → const BoxAlignmentGeometry

Aligns items based on their text baseline.

center → const BoxAlignmentBase

Centers content within the container.

end → const BoxAlignmentBase

Aligns to the end (right/bottom) of the container.

start → const BoxAlignmentBase

Aligns to the start (left/top) of the container.