TextScaler class abstract

A class that describes how textual contents should be scaled for better readability.

The scale function computes the scaled font size given the original unscaled font size specified by app developers.

The == operator defines the equality of 2 TextScalers, which the framework uses to determine whether text widgets should rebuild when their TextScaler changes. Consider overriding the == operator if applicable to avoid unnecessary rebuilds.

Annotations

Constructors

TextScaler()
Creates a TextScaler.
const
TextScaler.linear(double textScaleFactor)
Creates a proportional TextScaler that scales the incoming font size by multiplying it with the given textScaleFactor.
const
factory

Properties

hashCode int
The hash code for this object.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
textScaleFactor double
The estimated number of font pixels for each logical pixel. This property exists only for backward compatibility purposes, and will be removed in a future version of Flutter.
no setter

Methods

clamp({double minScaleFactor = 0, double maxScaleFactor = double.infinity}) TextScaler
Returns a new TextScaler that restricts the scaled font size to within the range [minScaleFactor * fontSize, maxScaleFactor * fontSize].
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
scale(double fontSize) double
Computes the scaled font size (in logical pixels) with the given unscaled fontSize (in logical pixels).
toString() String
A string representation of this object.
inherited

Operators

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

Constants

noScaling → const TextScaler
A TextScaler that doesn't scale the input font size.