StreamIntrinsicBoundedCrossAxis class

Marks a child of StreamIntrinsicFlex to be measured under the parent's cross-axis ceiling instead of unbounded constraints.

By default children are measured unbounded so Align and similar widgets shrink-wrap. Descendants that require a bounded cross-axis (e.g. ListView with shrinkWrap: true, Wrap) assert under that contract — wrap them in this widget to opt into the bounded path.

Has no effect when the parent's cross-axis is itself unbounded.

This can be combined with StreamIntrinsicSizeCandidate on the same child:

StreamIntrinsicColumn(
  children: [
    StreamIntrinsicSizeCandidate(
      child: StreamIntrinsicBoundedCrossAxis(child: MyContent()),
    ),
  ],
)

{@tool snippet}

A column whose first child needs a bounded width to host a ListView with shrinkWrap: true:

StreamIntrinsicColumn(
  children: [
    StreamIntrinsicBoundedCrossAxis(child: BubbleWithListView()),
    ReactionStrip(),
  ],
)

{@end-tool}

Inheritance

Constructors

StreamIntrinsicBoundedCrossAxis({Key? key, required Widget child})
Creates a widget that marks its child for bounded cross-axis measurement.
const

Properties

child → Widget
The widget below this widget in the tree.
finalinherited
debugTypicalAncestorWidgetClass → Type
Describes the RenderObjectWidget that is typically used to set up the ParentData that applyParentData will write to.
no setteroverride
debugTypicalAncestorWidgetDescription → String
Describes the RenderObjectWidget that is typically used to set up the ParentData that applyParentData will write to.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

applyParentData(RenderObject renderObject) → void
Write the data from this widget into the given render object's parent data.
override
createElement() → ParentDataElement<_IntrinsicFlexParentData>
Inflates this configuration to a concrete instance.
inherited
debugCanApplyOutOfTurn() → bool
Whether the ParentDataElement.applyWidgetOutOfTurn method is allowed with this widget.
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
debugIsValidRenderObject(RenderObject renderObject) → bool
Checks if this widget can apply its parent data to the provided renderObject.
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, int wrapWidth = 65}) → 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