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Add configurable scroll threshold (#910)

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* Add configurable scroll threshold

* update

---------

Co-authored-by: bggRGjQaUbCoE <githubaccount56556@proton.me>
This commit is contained in:
Tong xuewen
2025-07-29 23:02:05 +08:00
committed by GitHub
parent cf403aaf78
commit 3eb9c5b8ba
8 changed files with 191 additions and 103 deletions
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65
lib/pages/common/common_page.dart
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@@ -3,6 +3,7 @@ import 'dart:async';
import 'package:PiliPlus/pages/common/common_controller.dart';
import 'package:PiliPlus/pages/home/controller.dart';
import 'package:PiliPlus/pages/main/controller.dart';
import 'package:PiliPlus/utils/storage_pref.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:get/get.dart';
@@ -16,6 +17,11 @@ abstract class CommonPageState<T extends CommonPage, R extends CommonController>
R get controller;
StreamController<bool>? mainStream;
StreamController<bool>? searchBarStream;
// late double _downScrollCount = 0.0; // 向下滚动计数器
late double _upScrollCount = 0.0; // 向上滚动计数器
double? _lastScrollPosition; // 记录上次滚动位置
final _enableScrollThreshold = Pref.enableScrollThreshold;
late final double _scrollThreshold = Pref.scrollThreshold; // 滚动阈值
@override
void initState() {
@@ -30,15 +36,58 @@ abstract class CommonPageState<T extends CommonPage, R extends CommonController>
}
void listener() {
final ScrollDirection direction =
controller.scrollController.position.userScrollDirection;
if (direction == ScrollDirection.forward) {
mainStream?.add(true);
searchBarStream?.add(true);
} else if (direction == ScrollDirection.reverse) {
mainStream?.add(false);
searchBarStream?.add(false);
final scrollController = controller.scrollController;
final direction = scrollController.position.userScrollDirection;
if (!_enableScrollThreshold) {
if (direction == ScrollDirection.forward) {
mainStream?.add(true);
searchBarStream?.add(true);
} else if (direction == ScrollDirection.reverse) {
mainStream?.add(false);
searchBarStream?.add(false);
}
return;
}
final double currentPosition = scrollController.position.pixels;
// 初始化上次位置
_lastScrollPosition ??= currentPosition;
// 计算滚动距离
final double scrollDelta = currentPosition - _lastScrollPosition!;
if (direction == ScrollDirection.reverse) {
mainStream?.add(false);
searchBarStream?.add(false); // // 向下滚动，累加向下滚动距离，重置向上滚动计数器
_upScrollCount = 0.0; // 重置向上滚动计数器
// if (scrollDelta > 0) {
// _downScrollCount += scrollDelta;
// // _upScrollCount = 0.0; // 重置向上滚动计数器
// // 当累计向下滚动距离超过阈值时，隐藏顶底栏
// if (_downScrollCount >= _scrollThreshold) {
// mainStream?.add(false);
// searchBarStream?.add(false);
// }
// }
} else if (direction == ScrollDirection.forward) {
// 向上滚动，累加向上滚动距离，重置向下滚动计数器
if (scrollDelta < 0) {
_upScrollCount += (-scrollDelta); // 使用绝对值
// _downScrollCount = 0.0; // 重置向下滚动计数器
// 当累计向上滚动距离超过阈值时，显示顶底栏
if (_upScrollCount >= _scrollThreshold) {
mainStream?.add(true);
searchBarStream?.add(true);
}
}
}
// 更新上次位置
_lastScrollPosition = currentPosition;
}
@override