DecoratedBox class

A widget that paints a Decoration either before or after its child paints.

Container insets its child by the widths of the borders; this widget does not.

Commonly used with BoxDecoration.

The child is not clipped. To clip a child to the shape of a particular ShapeDecoration, consider using a ClipPath widget.

{@tool snippet}

This sample shows a radial gradient that draws a moon on a night sky:

const DecoratedBox(
  decoration: BoxDecoration(
    gradient: RadialGradient(
      center: Alignment(-0.5, -0.6),
      radius: 0.15,
      colors: <Color>[
        Color(0xFFEEEEEE),
        Color(0xFF111133),
      ],
      stops: <double>[0.9, 1.0],
    ),
  ),
)

{@end-tool}

See also:

• Ink, which paints a Decoration on a Material, allowing InkResponse and InkWell splashes to paint over them.
• DecoratedBoxTransition, the version of this class that animates on the decoration property.
• Decoration, which you can extend to provide other effects with DecoratedBox.
• CustomPaint, another way to draw custom effects from the widget layer.
• DecoratedSliver, which applies a Decoration to a sliver.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• DecoratedBox

Constructors

DecoratedBox({Key? key, required Decoration decoration, DecorationPosition position = DecorationPosition.background, Widget? child})

Creates a widget that paints a Decoration.

const

Properties

child → Widget?

The widget below this widget in the tree.

final

decoration → Decoration

What decoration to paint.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

position → DecorationPosition

Whether to paint the box decoration behind or in front of the child.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

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