MessageSnackbarListener<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
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- MessageSnackbarListener
Constructors
- MessageSnackbarListener({Key? key, required Widget child, void onError(String error)?, void onErrorTap()?, String errorActionLabel = 'Segnala', Color errorActionLabelColor = Colors.white, Color errorBackgroundColor = Colors.red, Widget errorLeading = const Icon(Icons.error, color: Colors.white), void onInfo(String info)?, void onInfoTap()?, String infoActionLabel = 'Info', Color infoActionLabelColor = Colors.white, Color infoBackgroundColor = Colors.lightBlue, Widget infoLeading = const Icon(Icons.info, color: Colors.white), Duration snackBarDisplayTime = const Duration(milliseconds: 4000)})
-
const
Properties
- child → Widget
-
final
- errorActionLabel → String
-
Customize error SnackBar action label
final
- errorActionLabelColor → Color
-
Customize error SnackBar action color
final
- errorBackgroundColor → Color
-
Customize error SnackBar background color
default to Colors.red
600
final - errorLeading → Widget
-
Customize error SnackBar leading icon
default to Icons.error
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- infoActionLabel → String
-
Customize info SnackBar action label
final
- infoActionLabelColor → Color
-
Customize info SnackBar action color
final
- infoBackgroundColor → Color
-
Customize info SnackBar background color
default to Colors.lightBlue
final
- infoLeading → Widget
-
Customize info SnackBar leading
default to Icons.info
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onError → (void Function(String error)?)
-
Additional function that can be called when an error message occur
final
- onErrorTap → (void Function()?)
-
if onErrorTap is not null an action will be added to the SnackBar when an error message occur
final
- onInfo → (void Function(String info)?)
-
Additional function that can be called when an info message occur
final
- onInfoTap → (void Function()?)
-
if onInfoTap is not null an action will be added to the SnackBar when an info message occur
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- snackBarDisplayTime → Duration
-
SnackBar duration
default is Duration(milliseconds: 4000)
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