RichText class

A paragraph of rich text.

The RichText widget displays text that uses multiple different styles. The text to display is described using a tree of TextSpan objects, each of which has an associated style that is used for that subtree. The text might break across multiple lines or might all be displayed on the same line depending on the layout constraints.

Text displayed in a RichText widget must be explicitly styled. When picking which style to use, consider using DefaultTextStyle.of the current BuildContext to provide defaults. For more details on how to style text in a RichText widget, see the documentation for TextStyle.

Consider using the Text widget to integrate with the DefaultTextStyle automatically. When all the text uses the same style, the default constructor is less verbose. The Text.rich constructor allows you to style multiple spans with the default text style while still allowing specified styles per span.

RichText(
  text: TextSpan(
    text: 'Hello ',
    style: DefaultTextStyle.of(context).style,
    children: <TextSpan>[
      TextSpan(text: 'bold', style: TextStyle(fontWeight: FontWeight.bold)),
      TextSpan(text: ' world!'),
    ],
  ),
)

Constructors

RichText({Key key, @required TextSpan text, TextAlign textAlign: TextAlign.start, TextDirection textDirection, bool softWrap: true, TextOverflow overflow: TextOverflow.clip, double textScaleFactor: 1.0, int maxLines, Locale locale, StrutStyle strutStyle }): Creates a paragraph of rich text. [...]
const

Properties

locale → Locale: Used to select a font when the same Unicode character can be rendered differently, depending on the locale. [...]
final
maxLines → int: An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow. [...]
final
overflow → TextOverflow: How visual overflow should be handled.
final
softWrap → bool: Whether the text should break at soft line breaks. [...]
final
strutStyle → StrutStyle: The strut style to use. Strut style defines the strut, which sets minimum vertical layout metrics. [...]
final
text → TextSpan: The text to display in this widget.
final
textAlign → TextAlign: How the text should be aligned horizontally.
final
textDirection → TextDirection: The directionality of the text. [...]
final
textScaleFactor → double: The number of font pixels for each logical pixel. [...]
final
hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited

Methods

createRenderObject(BuildContext context) → RenderParagraph: Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget. [...]
override
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node. [...]
override
updateRenderObject(BuildContext context, covariant RenderParagraph 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
createElement() → LeafRenderObjectElement: RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
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, inherited
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.debug }) → String: Returns 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 ==(dynamic other) → bool: The equality operator. [...]
inherited

widgets library

RichText class

Constructors

Properties

Methods

Operators