VitalApp/lib/components/android_scroll_wrapper/android_global_scroll_fix.dart

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:fis_common/env/env.dart';
import 'package:flutter/rendering.dart';
import 'package:vitalapp/architecture/app_parameters.dart';

// 用于修正工作站 鼠标滚动速度过慢的问题
class AndroidGlobalScrollFix extends StatefulWidget {
  const AndroidGlobalScrollFix({
    super.key,
    required this.child,
    this.scrollSpeed = 40.0,
  });
  final Widget child;
  final double scrollSpeed;

  @override
  State<AndroidGlobalScrollFix> createState() => _AndroidGlobalScrollFixState();
}

class _AndroidGlobalScrollFixState extends State<AndroidGlobalScrollFix> {
  FPlatformEnum get platform => FPlatform.current;

  @override
  void initState() {
    super.initState();
  }

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

  // 监听全局滚动 通过 BuildContext  来访问到当前激活的ScrollController
  @override
  Widget build(BuildContext context) {
    // return widget.child;

    if (platform == FPlatformEnum.android &&
        AppParameters.data.isLocalStation) {
      //  如果是安卓，需要监听滚动事件，加速安卓上鼠标的滚动
      return NotificationListener<ScrollNotification>(
        onNotification: (ScrollNotification notification) {
          if (notification is ScrollUpdateNotification) {
            final detail = notification.dragDetails;
            if (detail != null) {
              return true;
            }
            if (notification.context != null) {
              ScrollController? scrollController =
                  Scrollable.of(notification.context!).widget.controller;
              if (scrollController != null) {
                ScrollDirection scrollDirection =
                    scrollController.position.userScrollDirection;
                if (scrollDirection != ScrollDirection.idle) {
                  double scrollEnd = scrollController.offset +
                      (scrollDirection == ScrollDirection.reverse
                          ? widget.scrollSpeed
                          : -widget.scrollSpeed);
                  scrollEnd = min(
                      scrollController.position.maxScrollExtent,
                      max(scrollController.position.minScrollExtent,
                          scrollEnd));
                  scrollController.jumpTo(scrollEnd);
                }
              }
            }
          }
          return true;
        },
        child: widget.child,
      );
    } else {
      return widget.child;
    }
  }
}