mirror of
https://github.com/HChaZZY/PiliPlus.git
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5f8313901b
* opt: unused layout * mod: semantics * opt: DanmakuMsg type * opt: avoid cast * opt: unnecessary_lambdas * opt: use isEven * opt: logger * opt: invalid common page * tweak * opt: unify DynController
98 lines
3.2 KiB
Dart
98 lines
3.2 KiB
Dart
import 'dart:async';
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import 'package:PiliPlus/pages/common/common_controller.dart';
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import 'package:PiliPlus/pages/home/controller.dart';
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import 'package:PiliPlus/pages/main/controller.dart';
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import 'package:PiliPlus/utils/storage_pref.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:get/get.dart';
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abstract class CommonPageState<
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T extends StatefulWidget,
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R extends CommonController
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>
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extends State<T> {
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R get controller;
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StreamController<bool>? mainStream;
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StreamController<bool>? searchBarStream;
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// late double _downScrollCount = 0.0; // 向下滚动计数器
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late double _upScrollCount = 0.0; // 向上滚动计数器
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double? _lastScrollPosition; // 记录上次滚动位置
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final _enableScrollThreshold = Pref.enableScrollThreshold;
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late final double _scrollThreshold = Pref.scrollThreshold; // 滚动阈值
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@override
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void initState() {
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super.initState();
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try {
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mainStream = Get.find<MainController>().bottomBarStream;
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searchBarStream = Get.find<HomeController>().searchBarStream;
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} catch (_) {}
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if (mainStream != null || searchBarStream != null) {
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controller.scrollController.addListener(listener);
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}
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}
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void listener() {
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final scrollController = controller.scrollController;
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final direction = scrollController.position.userScrollDirection;
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if (!_enableScrollThreshold) {
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if (direction == ScrollDirection.forward) {
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mainStream?.add(true);
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searchBarStream?.add(true);
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} else if (direction == ScrollDirection.reverse) {
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mainStream?.add(false);
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searchBarStream?.add(false);
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}
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return;
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}
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final double currentPosition = scrollController.position.pixels;
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// 初始化上次位置
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_lastScrollPosition ??= currentPosition;
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// 计算滚动距离
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final double scrollDelta = currentPosition - _lastScrollPosition!;
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if (direction == ScrollDirection.reverse) {
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mainStream?.add(false);
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searchBarStream?.add(false); // // 向下滚动，累加向下滚动距离，重置向上滚动计数器
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_upScrollCount = 0.0; // 重置向上滚动计数器
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// if (scrollDelta > 0) {
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// _downScrollCount += scrollDelta;
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// // _upScrollCount = 0.0; // 重置向上滚动计数器
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// // 当累计向下滚动距离超过阈值时，隐藏顶底栏
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// if (_downScrollCount >= _scrollThreshold) {
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// mainStream?.add(false);
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// searchBarStream?.add(false);
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// }
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// }
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} else if (direction == ScrollDirection.forward) {
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// 向上滚动，累加向上滚动距离，重置向下滚动计数器
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if (scrollDelta < 0) {
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_upScrollCount += (-scrollDelta); // 使用绝对值
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// _downScrollCount = 0.0; // 重置向下滚动计数器
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// 当累计向上滚动距离超过阈值时，显示顶底栏
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if (_upScrollCount >= _scrollThreshold) {
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mainStream?.add(true);
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searchBarStream?.add(true);
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}
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}
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}
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// 更新上次位置
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_lastScrollPosition = currentPosition;
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}
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@override
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void dispose() {
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controller.scrollController.removeListener(listener);
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super.dispose();
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}
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}
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