JoltBuilder class

A widget that automatically rebuilds when any signal accessed in its builder changes.

JoltBuilder creates a reactive scope where any signal access is tracked. When tracked signals change, the widget automatically rebuilds with the new values.

This is the primary widget for creating reactive UIs with Jolt signals.

Usage

Any signal, computed value, or reactive collection accessed within the builder will be automatically tracked. When these reactive values change, the widget rebuilds to reflect the new state.

Multiple signals accessed in the same builder will trigger a single rebuild when any of them change. Batch updates are handled automatically, ensuring only one rebuild occurs per frame.

Parameters

• builder: Function that builds the widget tree and can access signals. This builder runs in a reactive scope, automatically tracking dependencies.

Example

final counter = Signal(0);
final name = Signal('Flutter');

JoltBuilder(
  builder: (context) => Column(
    children: [
      Text('Hello ${name.value}'),
      Text('Count: ${counter.value}'),
      ElevatedButton(
        onPressed: () => counter.value++,
        child: Text('Increment'),
      ),
    ],
  ),
)

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• JoltBuilder

Constructors

JoltBuilder({Key? key, required Widget builder(BuildContext context)})

const

Properties

builder → Widget Function(BuildContext context)

Function that builds the widget tree and can access reactive signals.

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

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() → JoltBuilderElement

Creates a StatelessElement to manage this widget's 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, 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