AdaptiveTextScale class

will apply a ChainedTextScaler to his subtree.

if the parent tree already has an ChainedTextScaler in its MediaQuery, the ChainedTextScaler.sourceScaler is inherited.

This avoids multiplying text scaler and allows to correctly show different manual scale factor with the same source scaler.

Example: This nesting does not multiply 2 x 1.5 x 4 but overrides the child to x4

AdaptiveTextScale.linear(
  scaleFactor: 2,
  child: AdaptiveTextScale.linear(
    scaleFactor: 1.5,
    child: AdaptiveTextScale.linear(
      scaleFactor: 4,
      child: SizedBox.shrink()
    )
  )
)

This is useful, if you want your users to allow customizing the in-app text scale while also applying the SystemTextScaler (which is delivered for Accessibility)

Inheritance

Constructors

AdaptiveTextScale({Key? key, required TextScaler scaler, bool? merge, required Widget child})
const
AdaptiveTextScale.linear({Key? key, double? scaleFactor, bool? merge, required Widget child})

Properties

child → Widget
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
merge → bool
if true (the default), we inherit the ancestor ChainedTextScaler.sourceScaler.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scaler → TextScaler
final

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