DecoratedBox class Null safety

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.

link
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],
    ),
  ),
)

See also:

Inheritance

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.
finalinherited
decoration → Decoration
What decoration to paint.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
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.
read-onlyinherited

Methods

createElement() → SingleChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderDecoratedBox
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
override
didUnmountRenderObject(covariant RenderObject renderObject) → void
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
protected">@protectedinherited
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 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}) → 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
updateRenderObject(BuildContext context, covariant RenderDecoratedBox renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

operator ==(Object other) → bool
The equality operator.
nonVirtual">@nonVirtualinherited