Feature request: ability to set scroll physics

[ricardoboss]

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I briefly looked at the code and to achieve setting scroll physics, a major rewrite would be required. You are currently using InteractiveViewer, which doesn't have a physics property or the concept of scrolling (just panning, which is scrolling in all directions, basically).

My experience with Dart and Flutter are limited, but I think the InteractiveViewer would need to be replaced with something like a ListView, which does support just setting physics.

Let me know what you think.

[espresso3389]

Basically, InteractiveViewer is vital to support zooming feature and it takes considerable (I don't know actually) time to implement physics with it.

But, for your purpose, you can simply use List.builder; the following fragment is from Multi-page view using ListView.builder:

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('Pdf_render example app'),
        ),
        backgroundColor: Colors.grey,
        body: Center(
          child: PdfDocumentLoader.openAsset(
            'assets/hello.pdf',
            documentBuilder: (context, pdfDocument, pageCount) => LayoutBuilder(
              builder: (context, constraints) => ListView.builder(
                itemCount: pageCount,
                itemBuilder: (context, index) => Container(
                  margin: EdgeInsets.all(margin),
                  padding: EdgeInsets.all(padding),
                  color: Colors.black12,
                  child: PdfPageView(
                    pdfDocument: pdfDocument,
                    pageNumber: index + 1,
                  )
                )
              )
            ),
          )
        )
      ),
    );
  }

[espresso3389]

Related: InteractiveViewer should allow us to easily customize the inertia physics #71676 flutter/flutter

[ricardoboss]

That let's me achieve the scroll physics I want, but it disables zooming in. I tried re-adding it using InteractiveViewer, but as I said, I'm not an experienced Flutter dev, so I was not able to get it to work... Any idea?

[espresso3389]

@ricardoboss It's not so easy task for any developer to implement such mechanism to InteractiveViewer :(