git-touch-android-ios-app/lib/screens/code_theme.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_highlight/flutter_highlight.dart';
import 'package:flutter_highlight/theme_map.dart';
import 'package:git_touch/models/code.dart';
import 'package:git_touch/scaffolds/single.dart';
import 'package:git_touch/widgets/app_bar_title.dart';
import 'package:git_touch/widgets/picker.dart';
import 'package:provider/provider.dart';

class CodeThemeScreen extends StatelessWidget {
  final String code;
  final String language;

  CodeThemeScreen(this.code, this.language);

  @override
  Widget build(BuildContext context) {
    var codeProvider = Provider.of<CodeModel>(context);

    return SingleScaffold(
      title: AppBarTitle('Code theme'),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: <Widget>[
          PickerGroup(
            items: [
              PickerGroupItem(
                title: 'Syntax Highlighting',
                value: codeProvider.theme,
                items: CodeModel.themes.map((v) => PickerItem(v, text: v)),
                onChange: (value) {
                  Provider.of<CodeModel>(context).setTheme(value);
                },
              ),
              PickerGroupItem(
                title: 'Font Size',
                value: codeProvider.fontSize.toString(),
                items: CodeModel.fontSizes
                    .map((v) => PickerItem(v.toString(), text: v.toString())),
                onChange: (value) {
                  Provider.of<CodeModel>(context)
                      .setFontSize(int.tryParse(value) ?? 16);
                },
              ),
              PickerGroupItem(
                title: 'Font Family',
                value: codeProvider.fontFamily,
                items:
                    CodeModel.fontFamilies.map((v) => PickerItem(v, text: v)),
                onChange: (String value) {
                  Provider.of<CodeModel>(context).setFontFamily(value);
                },
              ),
            ],
          ),
          SingleChildScrollView(
            scrollDirection: Axis.horizontal,
            child: HighlightView(
              code,
              language: language,
              theme: themeMap[codeProvider.theme],
              textStyle: TextStyle(
                fontSize: codeProvider.fontSize.toDouble(),
                fontFamily: codeProvider.fontFamilyUsed,
              ),
              padding: const EdgeInsets.all(10),
            ),
          )
        ],
      ),
    );
  }
}