pdf_handler 0.0.1

Compress PDF

example/lib/main.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:pdf_handler/pdf_handler.dart';
import 'package:pdf_handler/pdf_preview.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PDF Handler Example',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

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

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

class _MyHomePageState extends State<MyHomePage> {
  PDFHandler pdfHandler = PDFHandler();

  bool isProcessing = false;
  File? pdfFile;
  File? compressedPdfFile;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: const Text('PDF handler'),
      ),
      body: Container(
        padding: const EdgeInsets.all(24),
        alignment: Alignment.center,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            if (pdfFile != null) ...[
              Text('Original File path - \n${pdfFile?.path}'),
              const SizedBox(height: 16),
              ElevatedButton(
                onPressed: () async {
                  try {
                    isProcessing = true;
                    setState(() {});
                    compressedPdfFile =
                        await pdfHandler.compressPdf(pdfFile!, 100 * 1024);
                    isProcessing = false;
                    setState(() {});
                  } catch (exp) {
                    debugPrint('exp - $exp');
                  }
                },
                child: isProcessing
                    ? const SizedBox(
                        height: 16,
                        width: 16,
                        child: CircularProgressIndicator(strokeWidth: 2))
                    : const Text('Compress PDF'),
              ),
              ElevatedButton(
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => PdfPreviewScreen(
                        pdfFilePath: pdfFile!.path,
                      ),
                    ),
                  );
                },
                child: const Text('View original PDF'),
              )
            ],
            if (compressedPdfFile != null) ...[
              ElevatedButton(
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => PdfPreviewScreen(
                        pdfFilePath: compressedPdfFile!.path,
                      ),
                    ),
                  );
                },
                child: const Text('View compressed PDF'),
              )
            ],
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          pdfFile = await pdfHandler.selectPdf();
          setState(() {});
        },
        tooltip: 'Upload Pdf',
        child: const Icon(Icons.upload_file),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}