LazyBuilder class

Can be used to build a Widget lazily, such that, we can get the RenderBox for the Widget then build another widget accordingly.

Inheritance

Constructors

LazyBuilder({Key? key, required Widget child, LazyWidgetBuilder? builder, LazyOnErrorWidgetBuilder? onError, bool? forceTry, bool emptyOnError = false, BoxConstraints? constraints, bool preventRedundantRebuilds = false})
This can be used to build a Widget lazily, such that, we can get the RenderBox for the Widget then build another widget accordingly.
const

Properties

builder → LazyWidgetBuilder?
Provides the BuildContext, RenderBox of the offstage child, and the child itself.
final
child → Widget
Widget for which a RenderBox is generated.
final
constraints → BoxConstraints?
If is not null, then the child is displayed with these BoxConstraints as parent's BoxConstraints in offstage. i.e child's RenderBox is found under these BoxConstraints.
final
emptyOnError → bool
If it is true, then onError default function, will return empty Container.
final
forceTry → bool?
If it is true, then the child in offstage will be displayed until the RenderBox for child is found or not null.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onError → LazyOnErrorWidgetBuilder?
Used to generate Widget in case of an error. Error is passed as Nullable Object.
final
preventRedundantRebuilds → bool
If it is true, then the RenderBox will be generated again, only if the child's key has changed, instead of every build.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<LazyBuilder>
Creates the mutable state for this widget at a given location in the tree.
override
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