[native_pdf_view] in web mode, it's very hard to scroll

[christophemacabiau]

Describe the bug
Scrolling the document is very slow, almost unusable.

To Reproduce

import 'package:flutter/material.dart';
import 'package:native_pdf_view/native_pdf_view.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int _actualPageNumber = 1, _allPagesCount = 0;
  bool isSampleDoc = true;
  PdfController _pdfController;

  @override
  void initState() {
    _pdfController = PdfController(
      document: PdfDocument.openAsset('assets/sample.pdf'),
    );
    super.initState();
  }

  @override
  void dispose() {
    _pdfController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) => MaterialApp(
        theme: ThemeData(primaryColor: Colors.white),
        home: Scaffold(
          appBar: AppBar(
            title: Text('PdfView example'),
            actions: <Widget>[
              IconButton(
                icon: Icon(Icons.navigate_before),
                onPressed: () {
                  _pdfController.previousPage(
                    curve: Curves.ease,
                    duration: Duration(milliseconds: 100),
                  );
                },
              ),
              Container(
                alignment: Alignment.center,
                child: Text(
                  '$_actualPageNumber/$_allPagesCount',
                  style: TextStyle(fontSize: 22),
                ),
              ),
              IconButton(
                icon: Icon(Icons.navigate_next),
                onPressed: () {
                  _pdfController.nextPage(
                    curve: Curves.ease,
                    duration: Duration(milliseconds: 100),
                  );
                },
              ),
              IconButton(
                icon: Icon(Icons.refresh),
                onPressed: () {
                  if (isSampleDoc) {
                    _pdfController.loadDocument(
                        PdfDocument.openAsset('assets/dummy.pdf'));
                  } else {
                    _pdfController.loadDocument(
                        PdfDocument.openAsset('assets/sample.pdf'));
                  }
                  isSampleDoc = !isSampleDoc;
                },
              )
            ],
          ),
          body: PdfView(
            pageSnapping: false,
            scrollDirection: Axis.vertical,
            documentLoader: Center(child: CircularProgressIndicator()),
            pageLoader: Center(child: CircularProgressIndicator()),
            controller: _pdfController,
            onDocumentLoaded: (document) {
              setState(() {
                _actualPageNumber = 1;
                _allPagesCount = document.pagesCount;
              });
            },
          ),
        ),
      );
}

dependencies:
  native_pdf_view: ^3.9.0
  flutter:
    sdk: flutter

dependency_overrides:
  extended_image: 1.5.0-dev

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, 1.24.0-10.2.pre, on Linux, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[✓] Chrome - develop for the web
[✓] Android Studio
[✓] VS Code (version 1.53.0)

[JAICHANGPARK]

I had same problem

[gowtham-xseed]

+1

[SergeShkurko]

See #6 (comment)