WidgetStateTextStyle class abstract

Defines a TextStyle that is also a WidgetStateProperty.

This class exists to enable widgets with TextStyle valued properties to also accept WidgetStateProperty<TextStyle> values. A widget state text style property represents a text style which depends on a widget's "interactive state". This state is represented as a Set of WidgetStates, like WidgetState.pressed, WidgetState.focused and WidgetState.hovered.

WidgetStateTextStyle should only be used with widgets that document their support, like InputDecoration.labelStyle.

To use a WidgetStateTextStyle, you can either:

  1. Create a subclass of WidgetStateTextStyle and implement the abstract resolve method.
  2. Use WidgetStateTextStyle.resolveWith and pass in a callback that will be used to resolve the color in the given states.

If a WidgetStateTextStyle is used for a property or a parameter that doesn't support resolving WidgetStateProperty<TextStyle>s, then its default color value will be used for all states.

To define a const WidgetStateTextStyle, you'll need to extend WidgetStateTextStyle and override its resolve method. You'll also need to provide a defaultValue to the super constructor, so that we can know at compile-time what its default color is. See also:

Inheritance
Implemented types

Constructors

WidgetStateTextStyle()
Abstract const constructor. This constructor enables subclasses to provide const constructors so that they can be used in const expressions.
const
WidgetStateTextStyle.resolveWith(WidgetPropertyResolver<TextStyle> callback)
Creates a WidgetStateTextStyle from a WidgetPropertyResolver<TextStyle> callback function.
const
factory

Properties

background → Paint?
The paint drawn as a background for the text.
finalinherited
backgroundColor → Color?
The color to use as the background for the text.
finalinherited
color → Color?
The color to use when painting the text.
finalinherited
debugLabel → String?
A human-readable description of this text style.
finalinherited
decoration → TextDecoration?
The decorations to paint near the text (e.g., an underline).
finalinherited
decorationColor → Color?
The color in which to paint the text decorations.
finalinherited
decorationStyle → TextDecorationStyle?
The style in which to paint the text decorations (e.g., dashed).
finalinherited
decorationThickness → double?
The thickness of the decoration stroke as a multiplier of the thickness defined by the font.
finalinherited
fontFamily → String?
The name of the font to use when painting the text (e.g., Roboto).
finalinherited
fontFamilyFallback → List<String>?
The ordered list of font families to fall back on when a glyph cannot be found in a higher priority font family.
no setterinherited
fontFeatures → List<FontFeature>?
A list of FontFeatures that affect how the font selects glyphs.
finalinherited
fontSize → double?
The size of fonts (in logical pixels) to use when painting the text.
finalinherited
fontStyle → FontStyle?
The typeface variant to use when drawing the letters (e.g., italics).
finalinherited
fontVariations → List<FontVariation>?
A list of FontVariations that affect how a variable font is rendered.
finalinherited
fontWeight → FontWeight?
The typeface thickness to use when painting the text (e.g., bold).
finalinherited
foreground → Paint?
The paint drawn as a foreground for the text.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
height → double?
The height of this text span, as a multiple of the font size.
finalinherited
inherit → bool
Whether null values in this TextStyle can be replaced with their value in another TextStyle using merge.
finalinherited
leadingDistribution → TextLeadingDistribution?
How the vertical space added by the height multiplier should be distributed over and under the text.
finalinherited
letterSpacing → double?
The amount of space (in logical pixels) to add between each letter. A negative value can be used to bring the letters closer.
finalinherited
locale → Locale?
The locale used to select region-specific glyphs.
finalinherited
overflow → TextOverflow?
How visual text overflow should be handled.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
shadows → List<Shadow>?
A list of Shadows that will be painted underneath the text.
finalinherited
textBaseline → TextBaseline?
The common baseline that should be aligned between this text span and its parent text span, or, for the root text spans, with the line box.
finalinherited
wordSpacing → double?
The amount of space (in logical pixels) to add at each sequence of white-space (i.e. between each word). A negative value can be used to bring the words closer.
finalinherited

Methods

apply({Color? color, Color? backgroundColor, TextDecoration? decoration, Color? decorationColor, TextDecorationStyle? decorationStyle, double decorationThicknessFactor = 1.0, double decorationThicknessDelta = 0.0, String? fontFamily, List<String>? fontFamilyFallback, double fontSizeFactor = 1.0, double fontSizeDelta = 0.0, int fontWeightDelta = 0, FontStyle? fontStyle, double letterSpacingFactor = 1.0, double letterSpacingDelta = 0.0, double wordSpacingFactor = 1.0, double wordSpacingDelta = 0.0, double heightFactor = 1.0, double heightDelta = 0.0, TextBaseline? textBaseline, TextLeadingDistribution? leadingDistribution, Locale? locale, List<Shadow>? shadows, List<FontFeature>? fontFeatures, List<FontVariation>? fontVariations, String? package, TextOverflow? overflow}) → TextStyle
Creates a copy of this text style replacing or altering the specified properties.
inherited
compareTo(TextStyle other) → RenderComparison
Describe the difference between this style and another, in terms of how much damage it will make to the rendering.
inherited
copyWith({bool? inherit, Color? color, Color? backgroundColor, double? fontSize, FontWeight? fontWeight, FontStyle? fontStyle, double? letterSpacing, double? wordSpacing, TextBaseline? textBaseline, double? height, TextLeadingDistribution? leadingDistribution, Locale? locale, Paint? foreground, Paint? background, List<Shadow>? shadows, List<FontFeature>? fontFeatures, List<FontVariation>? fontVariations, TextDecoration? decoration, Color? decorationColor, TextDecorationStyle? decorationStyle, double? decorationThickness, String? debugLabel, String? fontFamily, List<String>? fontFamilyFallback, String? package, TextOverflow? overflow}) → TextStyle
Creates a copy of this text style but with the given fields replaced with the new values.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties, {String prefix = ''}) → void
Adds all properties prefixing property names with the optional prefix.
inherited
getParagraphStyle({TextAlign? textAlign, TextDirection? textDirection, TextScaler textScaler = TextScaler.noScaling, String? ellipsis, int? maxLines, TextHeightBehavior? textHeightBehavior, Locale? locale, String? fontFamily, double? fontSize, FontWeight? fontWeight, FontStyle? fontStyle, double? height, StrutStyle? strutStyle}) → ParagraphStyle
The style information for paragraphs, encoded for use by dart:ui.
inherited
getTextStyle({double textScaleFactor = 1.0, TextScaler textScaler = TextScaler.noScaling}) → TextStyle
The style information for text runs, encoded for use by dart:ui.
inherited
merge(TextStyle? other) → TextStyle
Returns a new text style that is a combination of this style and the given other style.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
resolve(Set<WidgetState> states) → TextStyle
Returns a TextStyle that's to be used when a component is in the specified state.
override
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
toStringShort() → String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited