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
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ReactiveShow
Constructors
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