CustomSingleChildLayoutModifier class

A widget that defers the layout of its single child to a delegate.

The delegate can determine the layout constraints for the child and can decide where to position the child. The delegate can also determine the size of the parent, but the size of the parent cannot depend on the size of the child.

See also:

• SingleChildLayoutDelegate, which controls the layout of the child.
• Align, which sizes itself based on its child's size and positions the child according to an Alignment value.
• FractionallySizedBox, which sizes its child based on a fraction of its own size and positions the child according to an Alignment value.
• CustomMultiChildLayout, which uses a delegate to position multiple children.
• The catalog of layout widgets.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• CustomSingleChildLayoutModifier

Available extensions

• ModifierTransformer

Constructors

CustomSingleChildLayoutModifier({Key? key, Widget? child, Key? modifierKey, required SingleChildLayoutDelegate delegate})

Creates a custom single child layout.

const

Properties

delegate → SingleChildLayoutDelegate

The delegate that controls the layout of the child.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

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

modified() → Modifier

Available on Widget, provided by the ModifierTransformer extension

Transform normal widget to Modifier

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