LayoutBuilder class

Builds its child widget tree based on the parent's BoxConstraints.

The builder callback receives the current constraints and returns a widget. Useful for widgets that need to know their available size before choosing how to render.

Inheritance

• Object
• Widget
• StatelessWidget
• LayoutBuilder

Constructors

LayoutBuilder({Key? key, required LayoutWidgetBuilder builder})

Creates a LayoutBuilder with the given builder callback.

const

Properties

builder → LayoutWidgetBuilder

Called at layout time with the current BoxConstraints.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another in the tree.

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.

override

createElement() → StatelessElement

Creates the Element for this widget.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited