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.)

See also:

Inheritance

Constructors

Creates a banner. [...]
const

Properties

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 corder).
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

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
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

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited