MessageListener<T extends MessageNotifierMixin> class

A listener for ChangeNotifier that extends MessageNotifierMixin mixin Wrapping a widget with MessageListener will use Scaffold.context to show Snackbars called from the ChangeNotifier class with notifyError or notifyInfo methods Useful to display error or information messages

As an example:

ChangeNotifierProvider.value(
  value: _model,
  child: Scaffold(
   appBar: AppBar(),
   body: MessageListener<Model>(
      child: ListView()
   )
  )
);
Inheritance

Constructors

MessageListener({Key? key, required Widget child, required void showError(String error), required void showInfo(String info)})
const

Properties

child → Widget
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showError → void Function(String error)
Additional function that can be called when an error message occur
final
showInfo → void Function(String info)
Additional function that can be called when an info message occur
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
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