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windows : Flutter. How do I change the scroll speed in a ListView on a mouse roller?

I am a beginner. I am writing a Flutter application for Windows. The problem is that the text in the ListView is scrolling too slowly with the mouse roller. I tried overriding ScrollPhysics but it didn't work. Please give me a working way to change the scrolling speed.

Please clarify your specific problem or provide more detailed information on what exactly you need. As it stands, it is difficult to understand exactly what you are asking.

Дух сообщества2021-12-15 00:05:04
windows flutter desktop
  • Answer # 1

    Got an answer on english stackoverflow. I'm copying here, maybe anyone will need it.

    import 'dart: math';
import 'package: flutter /material.dart';
import 'package: flutter /rendering.dart';
void main () {
  runApp (const MyApp ());
}
class MyApp extends StatefulWidget {
  const MyApp ({Key? key}): super (key: key);
  @override
  _MyAppState createState ()= >
 _MyAppState ();
}
class _MyAppState extends State <
MyApp >
 {
  @override
  Widget build (BuildContext context) {
    return MaterialApp (
      home: Scaffold (
        backgroundColor: Colors.black,
        body: ScrollViewTest (),
      ),
    );
  }
}
class ScrollViewTest extends StatelessWidget {
  static const _extraScrollSpeed ​​= 1000; //your "extra" scroll speed
  final ScrollController _scrollController= ScrollController ();
  //Constructor
  ScrollViewTest ({Key? Key}): super (key: key)
  {
    _scrollController.addListener (() {
      ScrollDirection scrollDirection= _scrollController.position.userScrollDirection;
      if (scrollDirection!= ScrollDirection.idle)
      {
        double scrollEnd= _scrollController.offset + (scrollDirection== ScrollDirection.reverse
            ? _extraScrollSpeed
            : -_extraScrollSpeed);
        scrollEnd= min (
            _scrollController.position.maxScrollExtent,
            max (_scrollController.position.minScrollExtent, scrollEnd));
        _scrollController.jumpTo (scrollEnd);
      }
    });
  }
  @override
  Widget build (BuildContext context)
  {
    return ListView (
      controller: _scrollController,
      children: [Text (
        '' '
        one
        2
        3
        4
        5
        6
        7
        eight
        9
        10
        eleven
        12
        thirteen
        14
        15
        sixteen
        17
        eighteen
        nineteen
        twenty
        21
        22
        23
        24
        25
        26
        27
        28
        29
        thirty
        31
        32
        33
        34
        35
        36
        37
        38
        39
        40
        41
        42
        43
        44
        45
        46
        47
        48
        49
        50
        '' ',
        style: TextStyle (color: Colors.white, fontSize: 30,),
      ),
    ],);
  }
}

    As it stands, your answer is incomprehensible. Please click edit below the post to add more details to help others understand how he answers the question. You can find more information on how to write good answers in the Help.

    Дух сообщества2021-12-15 15:29:02