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:
- CheckedModeBanner, which the WidgetsApp widget includes by default in debug mode, to show a banner that says "DEBUG".
- Inheritance
Constructors
- Banner({Key? key, Widget? child, required String message, TextDirection? textDirection, required BannerLocation location, TextDirection? layoutDirection, Color color = _kColor, TextStyle textStyle = _kTextStyle, BoxShadow shadow = _kShadow})
-
Creates a banner.
const
Properties
- child → Widget?
-
The widget to show behind the banner.
final
- color → Color
-
The color of the banner.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- 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
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- shadow → BoxShadow
-
The shadow properties for the banner.
final
- textDirection → TextDirection?
-
The directionality of the text.
final
- textStyle → TextStyle
-
The style of the text shown on the banner.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< Banner> -
Creates the mutable state for this widget at a given location in the tree.
override
-
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