FormFactors class

Defines supported form factors (screens sizes) and provides information on current form factor.

It listens to MediaQuery and based on its data provides updated form factor data when needed.

Typically it is placed somewhere at the top of widgets hierarchy, so descendant widgets that uses form factors data, like ResponsiveLayout, could obtain those data.

For some platforms the orientationLocks parameter allows to override the screen orientation, provided by MediaQuery. For example, on web it could be convenient to consider the browser window to be always in portrait orientation.

See also:

• FormFactor
• FormFactorsData
• ResponsiveLayout

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• FormFactors

Constructors

FormFactors({Key? key, required List<FormFactor> formFactors, required Widget child, FormFactorOrientationLocks orientationLocks = const FormFactorOrientationLocks()})

Creates an instance of FormFactors widget.

const

Properties

child → Widget

The widget below this widget in the tree.

final

formFactors → List<FormFactor>

List of supported form factors.

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

orientationLocks → FormFactorOrientationLocks

Controls screen orientation on some platforms.

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}) → 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

Static Methods

of(BuildContext context) → FormFactorsData

The data from the closest FormFactors instance.