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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.
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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,), ), ],); } }
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Дух сообщества2021-12-15 15:29:02
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