PingoraSelector<T extends Pingora, S> class
The PingoraSelector widget is a highly optimized reactive builder that listens to a specific Pingora controller and rebuilds only when a selected portion of the state changes. This helps avoid unnecessary UI rebuilds and improves performance by isolating updates to only required state slices instead of rebuilding the entire widget tree.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- PingoraSelector
Constructors
- PingoraSelector({Key? key, required T listenable(BuildContext context), required S selector(T controller), required Widget builder(BuildContext context, S value)})
-
Creates a PingoraSelector widget that listens to a specific portion
of a Pingora controller and rebuilds efficiently when the selected
state changes based on the provided selector function logic.
const
Properties
- builder → Widget Function(BuildContext context, S value)
-
A builder function that constructs the UI based on the selected value.
This function is only triggered when the selected state changes, which
improves performance by preventing unnecessary rebuilds of unchanged UI.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- listenable → T Function(BuildContext context)
-
A function that provides the instance of the Pingora controller
from the current BuildContext. This allows the selector to access
the correct scoped controller without relying on global instances.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- selector → S Function(T controller)
-
A selector function that extracts a specific piece of state from the
Pingora controller. Only the returned value is monitored for changes,
ensuring that the widget rebuilds only when this selected state changes.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< PingoraSelector< T, S> > -
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