delta_to_pdf 0.0.6

delta_to_pdf: ^0.0.6 copied to clipboard

example/lib/main.dart

import 'dart:io';

import 'package:delta_to_pdf/delta_to_pdf.dart';
import 'package:flutter/material.dart';
import 'package:flutter_quill/flutter_quill.dart' as fq;
import 'package:open_app_file/open_app_file.dart';
import 'package:path_provider/path_provider.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;

void main() {
  runApp(const MyApp());
}

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Delta to PDF Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a blue toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final fq.QuillController _controller = fq.QuillController.basic();

  showSavedSnackbar(String downloadLocation, filename) {
    SnackBar snackBar = SnackBar(
      content:
          Text('The File has been downloaded and saved to $downloadLocation'),
      action: SnackBarAction(
          label: 'Open',
          onPressed: () {
            OpenAppFile.open('$downloadLocation/$filename');
          }),
    );
    ScaffoldMessenger.of(context).showSnackBar(snackBar);
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: const Text('Delta to PDF Demo'),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          //
          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
          // action in the IDE, or press "p" in the console), to see the
          // wireframe for each widget.
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            fq.QuillToolbar.basic(controller: _controller),
            Expanded(
              child: fq.QuillEditor.basic(
                controller: _controller,
                readOnly: false,
              ),
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          final pdf = pw.Document();
          pdf.addPage(pw.Page(
              pageFormat: PdfPageFormat.a4,
              margin: pw.EdgeInsets.zero,
              build: (pw.Context context) {
                var delta = _controller.document.toDelta().toList();
                DeltaToPDF dpdf = DeltaToPDF();
                return dpdf.deltaToPDF(delta);
              }));
          final output = await getApplicationDocumentsDirectory();
          final file = File("${output.path}/document.pdf");
          await file.writeAsBytes(await pdf.save());

          showSavedSnackbar(output.path, 'document.pdf');
        },
        tooltip: 'Export',
        child: const Text('Export'),
      ), // This trailing comma makes auto-formatting nicer for build methods.
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
    );
  }
}