ButtonGroupData class

Data class defining border radius multipliers for grouped buttons.

ButtonGroupData specifies which corners of a button should have reduced border radius when part of a ButtonGroup. Values of 0.0 remove the radius entirely (for internal buttons), while 1.0 preserves the full radius (for end buttons).

This class uses directional values (start/end) to support RTL layouts properly. The static constants provide common configurations for different positions within a button group.

Example:

// First button in horizontal group - preserve left radius, remove right
ButtonGroupData.horizontal(end: 0.0)

// Middle button - remove all radius
ButtonGroupData.zero

// Last button in horizontal group - remove left radius, preserve right
ButtonGroupData.horizontal(start: 0.0)

Constructors

ButtonGroupData({required double topStartValue, required double topEndValue, required double bottomStartValue, required double bottomEndValue})

Creates button group data with individual corner multipliers.

const

ButtonGroupData.all(double value)

Creates group data with the same multiplier for all corners.

const

ButtonGroupData.horizontal({double start = 1.0, double end = 1.0})

Creates horizontal group data with start and end multipliers.

const

ButtonGroupData.horizontalIndex(int index, int length)

Creates group data for a button at index in a horizontal group of length buttons.

factory

ButtonGroupData.vertical({double top = 1.0, double bottom = 1.0})

Creates vertical group data with top and bottom multipliers.

const

ButtonGroupData.verticalIndex(int index, int length)

Creates group data for a button at index in a vertical group of length buttons.

factory

Properties

bottomEndValue → double

Border radius multiplier for bottom-end corner (0.0 to 1.0).

final

bottomStartValue → double

Border radius multiplier for bottom-start corner (0.0 to 1.0).

final

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

topEndValue → double

Border radius multiplier for top-end corner (0.0 to 1.0).

final

topStartValue → double

Border radius multiplier for top-start corner (0.0 to 1.0).

final

Methods

applyToBorderRadius(BorderRadiusGeometry borderRadius, TextDirection textDirection) → BorderRadiusGeometry

Applies corner multipliers to a border radius.

applyToButtonGroupData(ButtonGroupData other) → ButtonGroupData

Combines this group data with another by multiplying corresponding corner values.

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

horizontalEnd → const ButtonGroupData

Horizontal end position - no start radius, full end radius.

horizontalStart → const ButtonGroupData

Horizontal start position - full start radius, no end radius.

none → const ButtonGroupData

No modification - full border radius on all corners.

verticalBottom → const ButtonGroupData

Vertical bottom position - no top radius, full bottom radius.

verticalTop → const ButtonGroupData

Vertical top position - full top radius, no bottom radius.

zero → const ButtonGroupData

Zero radius - removes border radius from all corners.