ResponsiveText class

A text widget with automatic responsive font sizing.

Eliminates the need to manually call context.fontSize() on every TextStyle. Supports both breakpoint-based scaling and design-proportional scaling, with optional min/max font size bounds.

// Breakpoint-based scaling (default)
ResponsiveText('Hello World', baseFontSize: 16)

// Design-proportional scaling (like screenutil's .sp)
ResponsiveText('Hello World', baseFontSize: 16, useDesignScale: true)

// With min/max bounds
ResponsiveText('Hello World', baseFontSize: 16, minFontSize: 12, maxFontSize: 24)
Inheritance
Available extensions

Constructors

ResponsiveText(String text, {Key? key, double baseFontSize = 14, double? minFontSize, double? maxFontSize, TextStyle? style, TextAlign? textAlign, int? maxLines, TextOverflow? overflow, bool useDesignScale = false})
const

Properties

baseFontSize → double
The base font size at design time. This is the font size you'd use in your design mockup. It will be scaled based on device type.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxFontSize → double?
Maximum font size ceiling. The computed size will never exceed this.
final
maxLines → int?
Maximum number of lines.
final
minFontSize → double?
Minimum font size floor. The computed size will never go below this.
final
overflow → TextOverflow?
Text overflow behavior.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
style → TextStyle?
Additional text styling. The fontSize in this style is overridden by the responsive calculation.
final
text → String
The text to display.
final
textAlign → TextAlign?
Text alignment.
final
useDesignScale → bool
If true, uses design-proportional scaling via context.sp(). If false (default), uses breakpoint-based scaling via context.fontSize().
final

Methods

adaptiveConstrained(BuildContext context) → Widget

Available on Widget, provided by the ResponsiveConstraints extension

Responsive constraint based on device type, using config-driven max widths.
build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
constrained({double maxWidth = 800}) → Widget

Available on Widget, provided by the ResponsiveConstraints extension

Centers the widget and ensures its width does not exceed maxWidth.
constrainedBoth({double maxWidth = 800, double maxHeight = 600}) → Widget

Available on Widget, provided by the ResponsiveConstraints extension

Constrains widget with both max width and height.
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