IntrinsicWidthModifier class

A widget that sizes its child to the child's maximum intrinsic width.

This class is useful, for example, when unlimited width is available and you would like a child that would otherwise attempt to expand infinitely to instead size itself to a more reasonable width.

The constraints that this widget passes to its child will adhere to the parent's constraints, so if the constraints are not large enough to satisfy the child's maximum intrinsic width, then the child will get less width than it otherwise would. Likewise, if the minimum width constraint is larger than the child's maximum intrinsic width, the child will be given more width than it otherwise would.

If stepWidth is non-null, the child's width will be snapped to a multiple of the stepWidth. Similarly, if stepHeight is non-null, the child's height will be snapped to a multiple of the stepHeight.

This class is relatively expensive, because it adds a speculative layout pass before the final layout phase. Avoid using it where possible. In the worst case, this widget can result in a layout that is O(N²) in the depth of the tree.

See also:

Inheritance
Available extensions

Constructors

IntrinsicWidthModifier({Key? key, Widget? child, Key? modifierKey, double? stepWidth, double? stepHeight})
Creates a widget that sizes its child to the child's intrinsic width.
const

Properties

hashCode int
The hash code for this object.
no setterinherited
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
modifierKey Key?
The actual key of the widget, which Modifier wrapped
finalinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
stepHeight double?
If non-null, force the child's height to be a multiple of this value.
final
stepWidth double?
If non-null, force the child's width to be a multiple of this value.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
inherited
buildWithChild(BuildContext context, Widget? child) Widget
A build method that receives an extra child parameter.
override
createElement() SingleChildStatelessElement
Create a SingleChildStatelessElement
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