CrossAxisAlignment enum Null safety

How the children should be placed along the cross axis in a flex layout.

See also:

Inheritance

Constructors

CrossAxisAlignment()
const

Values

start → const CrossAxisAlignment

Place the children with their start edge aligned with the start side of the cross axis.

For example, in a column (a flex with a vertical axis) whose TextDirection is TextDirection.ltr, this aligns the left edge of the children along the left edge of the column.

If this value is used in a horizontal direction, a TextDirection must be available to determine if the start is the left or the right.

If this value is used in a vertical direction, a VerticalDirection must be available to determine if the start is the top or the bottom.

CrossAxisAlignment()
end → const CrossAxisAlignment

Place the children as close to the end of the cross axis as possible.

For example, in a column (a flex with a vertical axis) whose TextDirection is TextDirection.ltr, this aligns the right edge of the children along the right edge of the column.

If this value is used in a horizontal direction, a TextDirection must be available to determine if the end is the left or the right.

If this value is used in a vertical direction, a VerticalDirection must be available to determine if the end is the top or the bottom.

CrossAxisAlignment()
center → const CrossAxisAlignment

Place the children so that their centers align with the middle of the cross axis.

This is the default cross-axis alignment.

CrossAxisAlignment()
stretch → const CrossAxisAlignment

Require the children to fill the cross axis.

This causes the constraints passed to the children to be tight in the cross axis.

CrossAxisAlignment()
baseline → const CrossAxisAlignment

Place the children along the cross axis such that their baselines match.

Because baselines are always horizontal, this alignment is intended for horizontal main axes. If the main axis is vertical, then this value is treated like start.

For horizontal main axes, if the minimum height constraint passed to the flex layout exceeds the intrinsic height of the cross axis, children will be aligned as close to the top as they can be while honoring the baseline alignment. In other words, the extra space will be below all the children.

Children who report no baseline will be top-aligned.

CrossAxisAlignment()

Properties

hashCode → int
The hash code for this object.
read-onlyinherited
index → int
A numeric identifier for the enumerated value.
read-onlyinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

values → const List<CrossAxisAlignment>
A constant List of the values in this enum, in order of their declaration.
[start, end, center, stretch, baseline]