FontFeature.contextualAlternates constructor Null safety

const FontFeature.contextualAlternates()

Enable contextual alternates. (calt)

With this feature enabled, specific glyphs may be replaced by alternatives based on nearby text.

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The Barriecito font supports the calt feature. It causes some letters in close proximity to other instances of themselves to use different glyphs, to give the appearance of more variation in the glyphs, rather than having each letter always use a particular glyph.

To create a local project with this code sample, run:
flutter create --sample=dart.dart_ui.FontFeature.contextualAlternates.1 mysample 
import 'dart:ui';

import 'package:flutter/widgets.dart';

void main() => runApp(const ExampleApp());

class ExampleApp extends StatelessWidget {
  const ExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return WidgetsApp(
      builder: (BuildContext context, Widget? navigator) =>
          const ExampleWidget(),
      color: const Color(0xffffffff),
    );
  }
}

class ExampleWidget extends StatelessWidget {
  const ExampleWidget({super.key});

  @override
  Widget build(BuildContext context) {
    // The Barriecito font can be downloaded from Google Fonts (https://www.google.com/fonts).
    return const Text(
      "Ooohh, we weren't going to tell him that.",
      style: TextStyle(
        fontFamily: 'Barriecito',
        fontFeatures: <FontFeature>[
          FontFeature.contextualAlternates(),
        ],
      ),
    );
  }
}

See also:

Implementation

const FontFeature.contextualAlternates() : feature = 'calt', value = 1;