BankFraudAlertBanner class

High-priority fraud warning banner.

Deliberately resists accidental dismissal:

  • No swipe-to-dismiss gesture.
  • The onDismiss button is small and positioned as a secondary action.
  • The primary action (onPrimaryAction) is the prominent call to act.

Visual treatment:

Accessibility: the entire widget is annotated as Fraud alert: $title via Semantics.

BankFraudAlertBanner(
  title: 'Suspicious transaction detected',
  body: 'A payment of £420 to an unknown recipient was attempted '
      'on your account. Did you authorise this?',
  primaryActionLabel: 'Secure My Account',
  dismissLabel: 'Not me: dismiss',
  onPrimaryAction: () => navigator.push(SecureAccountRoute()),
  onDismiss: () => bloc.add(DismissFraudAlertEvent()),
)
Inheritance

Constructors

BankFraudAlertBanner({required String title, required String body, required String primaryActionLabel, required String dismissLabel, required VoidCallback onPrimaryAction, required VoidCallback onDismiss, Key? key, EdgeInsetsGeometry? padding, BorderRadius? radius, Color? backgroundColor, Color? foregroundColor, Color? accentColor, IconData? icon, TextStyle? titleStyle, TextStyle? bodyStyle, String? semanticLabel})
const

Properties

accentColor → Color?
Accent for the left border, icon, title, and primary button. Defaults to BankTokens.danger.
final
backgroundColor → Color?
Overrides the banner background. Defaults to the accent colour at 8% alpha.
final
body → String
Detailed description of the suspected fraud.
final
bodyStyle → TextStyle?
Merged over the computed body style (BankTokens.bodySmall in BankThemeData.onSurface).
final
dismissLabel → String
Label for the dismiss action button.
final
foregroundColor → Color?
Overrides the body text colour. Defaults to BankThemeData.onSurface.
final
hashCode → int
The hash code for this object.
no setterinherited
icon → IconData?
Overrides the fraud glyph. Defaults to Icons.gpp_bad_outlined.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onDismiss → VoidCallback
Called when the user explicitly taps the dismiss button.
final
onPrimaryAction → VoidCallback
Called when the user taps the primary action (e.g. "Secure My Account").
final
padding → EdgeInsetsGeometry?
Overrides the content padding. Defaults to EdgeInsets.all of BankTokens.space4.
final
primaryActionLabel → String
Label for the primary action button.
final
radius → BorderRadius?
Overrides the banner corner radius. Defaults to BankThemeData.cardRadius.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticLabel → String?
Overrides the container semantics label. Defaults to 'Fraud alert: $title'.
final
title → String
Short title summarising the security event.
final
titleStyle → TextStyle?
Merged over the computed title style (BankTokens.labelLarge in the accent colour).
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, 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