PlaceholderModifier class

A widget that draws a box that represents where other widgets will one day be added.

This widget is useful during development to indicate that the interface is not yet complete.

By default, the placeholder is sized to fit its container. If the placeholder is in an unbounded space, it will size itself according to the given fallbackWidth and fallbackHeight.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• PlaceholderModifier

Available extensions

• ModifierTransformer

Constructors

PlaceholderModifier({Key? key, Widget? child, Key? modifierKey, Color color = const Color(0xFF455A64), double strokeWidth = 2.0, double fallbackWidth = 400.0, double fallbackHeight = 400.0})

Creates a widget which draws a box.

const

Properties

color → Color

The color to draw the placeholder box.

final

fallbackHeight → double

The height to use when the placeholder is in a situation with an unbounded height.

final

fallbackWidth → double

The width to use when the placeholder is in a situation with an unbounded width.

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

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

strokeWidth → double

The width of the lines in the placeholder box.

final

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

inherited

buildWithChild(BuildContext context, Widget? child) → Widget

A build method that receives an extra child parameter.

override

createElement() → SingleChildStatelessElement

Create a SingleChildStatelessElement

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

modified() → Modifier

Available on Widget, provided by the ModifierTransformer extension

Transform normal widget to Modifier

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