Gap class

A widget that takes a fixed amount of space in the direction of its ancestors.

It only works in the following cases:

• It is a descendant of a Row, Column, or Flex, and the path from the Gap widget to its enclosing Row, Column, or Flex must contain only StatelessWidgets or StatefulWidgets (not other kinds of widgets, like RenderObjectWidgets).
• It is a descendant of a Scrollable.

See also:

• MaxGap, a gap that can take, at most, the amount of space specified.
• SliverGap, the sliver version of this widget.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• Gap

Constructors

Gap(double mainAxisExtent, {Key? key, Axis? fallbackDirection, double? crossAxisExtent, Color? color, double? thickness, double? indent, double? endIndent})

Creates a widget that takes a fixed mainAxisExtent of space in the direction of its ancestors.

const

Gap.expand(double mainAxisExtent, {Key? key, Axis? fallbackDirection, Color? color, double? thickness, double? indent, double? endIndent})

Creates a widget that takes a fixed mainAxisExtent of space in the direction of its ancestors and expands in the cross axis direction.

const

Properties

color → Color?

The color used to fill the gap.

final

crossAxisExtent → double?

The amount of space this widget takes in the opposite direction of the ancestors.

final

endIndent → double?

The amount of empty space to the trailing edge of the gap.

final

fallbackDirection → Axis?

The direction to use when its ancestors is not a Flex widget.

final

hashCode → int

The hash code for this object.

no setter, inherited

indent → double?

The amount of empty space to the leading edge of the gap.

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

mainAxisExtent → double

The amount of space this widget takes in the direction of its ancestors.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

thickness → double?

The thickness of the line drawn within the gap.

final

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

debugDescribeChildren() → List<DiagnosticsNode>

Returns a list of DiagnosticsNode objects describing this node's children.

inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) → void

Add additional properties associated with the node.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String

A string representation of this object.

inherited

toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String

Returns a string representation of this node and its descendants.

inherited

toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String

Returns a one-line detailed description of the object.

inherited

toStringShort() → String

A short, textual description of this widget.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited