ReactiveShow class

A conditional reactive widget that rebuilds when the associated reactiveKey is triggered.

ReactiveShow allows you to conditionally render a widget based on the result of a showIf predicate. When showIf returns true, builder is shown; otherwise, elseShow is rendered (defaults to Nothing).

It listens to changes via refresh or refreshOnly using the provided reactiveKey.


Example:

bool isLoggedIn = false;

ReactiveShow(
  showIf: () => isLoggedIn,
  builder: () => Text("Welcome back!"),
  elseShow: Text("Please sign in"),
)

// Later...
isLoggedIn = true;
refresh(); // Rebuilds the widget to reflect the new condition.
Inheritance

Constructors

ReactiveShow.new({Key? key, Widget elseShow = const Nothing(), bool showIf()?, required Widget builder(), Key? reactiveKey})
Creates a conditional reactive widget.

Properties

builder Widget Function()
The widget builder shown when showIf returns true.
final
elseShow Widget
The fallback widget shown when showIf returns false.
final
hashCode int
The hash code for this object.
no setterinherited
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
reactiveKey Key
The reactive key this widget listens to.
final
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
showIf bool Function()?
A predicate that determines whether builder or elseShow is rendered.
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() State<ReactiveShow>
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, 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