Text class
A run of text with a single style.
The Text widget displays a string of text with single style. The string might break across multiple lines or might all be displayed on the same line depending on the layout constraints.
The style argument is optional. When omitted, the text will use the style from the closest enclosing DefaultTextStyle. If the given style's TextStyle.inherit property is true (the default), the given style will be merged with the closest enclosing DefaultTextStyle. This merging behavior is useful, for example, to make the text bold while using the default font family and size.
Text(
'Hello, $_name! How are you?',
textAlign: TextAlign.center,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontWeight: FontWeight.bold),
)
Using the Text.rich constructor, the Text widget can display a paragraph with differently styled TextSpans. The sample that follows displays "Hello beautiful world" with different styles for each word.
const Text.rich(
TextSpan(
text: 'Hello', // default text style
children: <TextSpan>[
TextSpan(text: ' beautiful ', style: TextStyle(fontStyle: FontStyle.italic)),
TextSpan(text: 'world', style: TextStyle(fontWeight: FontWeight.bold)),
],
),
)
Interactivity
To make Text react to touch events, wrap it in a GestureDetector widget with a GestureDetector.onTap handler.
In a material design application, consider using a FlatButton instead, or if that isn't appropriate, at least using an InkWell instead of GestureDetector.
To make sections of the text interactive, use RichText and specify a TapGestureRecognizer as the TextSpan.recognizer of the relevant part of the text.
See also:
- RichText, which gives you more control over the text styles.
- DefaultTextStyle, which sets default styles for Text widgets.
- Inheritance
Constructors
- Text(String data, { Key key, TextStyle style, TextAlign textAlign, TextDirection textDirection, Locale locale, bool softWrap, TextOverflow overflow, double textScaleFactor, int maxLines, String semanticsLabel })
-
Creates a text widget. [...]
const
- Text.rich(TextSpan textSpan, { Key key, TextStyle style, TextAlign textAlign, TextDirection textDirection, Locale locale, bool softWrap, TextOverflow overflow, double textScaleFactor, int maxLines, String semanticsLabel })
-
Creates a text widget with a TextSpan.
const
Properties
- data → String
-
The text to display. [...]
final
- 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
- semanticsLabel → String
-
An alternative semantics label for this text. [...]
final
- softWrap → bool
-
Whether the text should break at soft line breaks. [...]
final
- style → TextStyle
-
If non-null, the style to use for this text. [...]
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
- textSpan → TextSpan
-
The text to display as a TextSpan. [...]
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
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget. [...]
override
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
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. [...]
@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 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