Banner class

Displays a diagonal message above the corner of another widget.

Useful for showing the execution mode of an app (e.g., that asserts are enabled.)

Constructors

Banner({Key key, Widget child, @required String message, TextDirection textDirection, @required BannerLocation location, TextDirection layoutDirection, Color color: _kColor, TextStyle textStyle: _kTextStyle }): Creates a banner. [...]
const

child → Widget: The widget to show behind the banner. [...]
final
color → Color: The color of the banner.
final
layoutDirection → TextDirection: The directionality of the layout. [...]
final
location → BannerLocation: Where to show the banner (e.g., the upper right corner).
final
message → String: The message to show in the banner.
final
textDirection → TextDirection: The directionality of the text. [...]
final
textStyle → TextStyle: The style of the text shown on the banner.
final
hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget. [...]
override
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node. [...]
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. [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent 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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns 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