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fix: correct the scrolling status error when adding new records to the merged record group

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This commit is contained in:
Nedifinita
2025-10-08 22:35:43 +08:00
parent cc2a495984
commit 5b3960f7d6
2 changed files with 218 additions and 217 deletions
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428
lib/screens/history_screen.dart
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@@ -1,9 +1,7 @@
import 'dart:math' as math;
import 'dart:isolate';
import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:latlong2/latlong.dart';
import 'package:geolocator/geolocator.dart';
@@ -33,6 +31,10 @@ class HistoryScreenState extends State<HistoryScreen> {
final List<Object> _displayItems = [];
bool _isLoading = true;
bool _isEditMode = false;
int? _anchorIndex;
double? _anchorOffset;
double? _oldCardHeight;
double? _oldScrollOffset;
final Set<String> _selectedRecords = {};
final Map<String, bool> _expandedStates = {};
final ScrollController _scrollController = ScrollController();
@@ -41,7 +43,6 @@ class HistoryScreenState extends State<HistoryScreen> {
late final ChatScrollObserver _chatObserver;
bool _isAtTop = true;
MergeSettings _mergeSettings = MergeSettings();
double _itemHeightCache = 0.0;
final Map<String, double> _mapOptimalZoom = {};
final Map<String, bool> _mapCalculating = {};
@@ -74,15 +75,21 @@ class HistoryScreenState extends State<HistoryScreen> {
super.initState();
_chatObserver = ChatScrollObserver(_observerController)
..toRebuildScrollViewCallback = () {
setState(() {});
if (mounted) {
setState(() {});
}
};
_scrollController.addListener(() {
if (_scrollController.position.atEdge) {
if (_scrollController.position.pixels == 0) {
if (!_isAtTop) setState(() => _isAtTop = true);
if (!_isAtTop) {
setState(() => _isAtTop = true);
}
}
} else {
if (_isAtTop) setState(() => _isAtTop = false);
if (_isAtTop) {
setState(() => _isAtTop = false);
}
}
});
WidgetsBinding.instance.addPostFrameCallback((_) {
@@ -109,17 +116,19 @@ class HistoryScreenState extends State<HistoryScreen> {
List<TrainRecord> filteredRecords = allRecords;
if ((settingsMap['hideTimeOnlyRecords'] ?? 0) == 1) {
int hiddenCount = 0;
int shownCount = 0;
filteredRecords = allRecords.where((record) {
bool isFieldMeaningful(String field) {
if (field.isEmpty) return false;
String cleaned = field.replaceAll('<NUL>', '').trim();
if (cleaned.isEmpty) return false;
if (cleaned.runes
.every((r) => r == '*'.runes.first || r == ' '.runes.first))
if (field.isEmpty) {
return false;
}
String cleaned = field.replaceAll('<NUL>', '').trim();
if (cleaned.isEmpty) {
return false;
}
if (cleaned.runes
.every((r) => r == '*'.runes.first || r == ' '.runes.first)) {
return false;
}
return true;
}
@@ -160,12 +169,6 @@ class HistoryScreenState extends State<HistoryScreen> {
hasLbjClass ||
hasTrain;
if (!shouldShow) {
hiddenCount++;
} else {
shownCount++;
}
return shouldShow;
}).toList();
}
@@ -192,7 +195,9 @@ class HistoryScreenState extends State<HistoryScreen> {
}
}
} catch (e) {
if (mounted) setState(() => _isLoading = false);
if (mounted) {
setState(() => _isLoading = false);
}
}
}
@@ -201,57 +206,7 @@ class HistoryScreenState extends State<HistoryScreen> {
final settingsMap = await DatabaseService.instance.getAllSettings() ?? {};
_mergeSettings = MergeSettings.fromMap(settingsMap);
if ((settingsMap['hideTimeOnlyRecords'] ?? 0) == 1) {
bool isFieldMeaningful(String field) {
if (field.isEmpty) return false;
String cleaned = field.replaceAll('<NUL>', '').trim();
if (cleaned.isEmpty) return false;
if (cleaned.runes
.every((r) => r == '*'.runes.first || r == ' '.runes.first))
return false;
return true;
}
final hasTrainNumber = isFieldMeaningful(newRecord.fullTrainNumber) &&
!newRecord.fullTrainNumber.contains("-----");
final hasDirection =
newRecord.direction == 1 || newRecord.direction == 3;
final hasLocoInfo = isFieldMeaningful(newRecord.locoType) ||
isFieldMeaningful(newRecord.loco);
final hasRoute = isFieldMeaningful(newRecord.route);
final hasPosition = isFieldMeaningful(newRecord.position);
final hasSpeed =
isFieldMeaningful(newRecord.speed) && newRecord.speed != "NUL";
final hasPositionInfo = isFieldMeaningful(newRecord.positionInfo);
final hasTrainType = isFieldMeaningful(newRecord.trainType) &&
newRecord.trainType != "未知";
final hasLbjClass =
isFieldMeaningful(newRecord.lbjClass) && newRecord.lbjClass != "NA";
final hasTrain = isFieldMeaningful(newRecord.train) &&
!newRecord.train.contains("-----");
if (!hasTrainNumber &&
!hasDirection &&
!hasLocoInfo &&
!hasRoute &&
!hasPosition &&
!hasSpeed &&
!hasPositionInfo &&
!hasTrainType &&
!hasLbjClass &&
!hasTrain) {
return;
}
}
if ((settingsMap['hideTimeOnlyRecords'] ?? 0) == 1) {}
final isNewRecord = !_displayItems.any((item) {
if (item is TrainRecord) {
@@ -261,32 +216,132 @@ class HistoryScreenState extends State<HistoryScreen> {
}
return false;
});
if (!isNewRecord) return;
final allRecords = await DatabaseService.instance.getAllRecords();
final items = MergeService.getMixedList(allRecords, _mergeSettings);
if (mounted) {
if (!_isAtTop) {
_chatObserver.standby();
}
final hasDataChanged = _hasDataChanged(items);
if (hasDataChanged) {
if (_isAtTop) {
setState(() {
_displayItems.clear();
_displayItems.addAll(items);
bool isMerge = false;
Object? mergeResult;
if (_displayItems.isNotEmpty) {
final firstItem = _displayItems.first;
List<TrainRecord> tempRecords = [newRecord];
if (firstItem is MergedTrainRecord) {
tempRecords.addAll(firstItem.records);
} else if (firstItem is TrainRecord) {
tempRecords.add(firstItem);
}
final mergeCheckResult =
MergeService.getMixedList(tempRecords, _mergeSettings);
if (mergeCheckResult.length == 1 &&
mergeCheckResult.first is MergedTrainRecord) {
isMerge = true;
mergeResult = mergeCheckResult.first;
}
}
if (isMerge) {
_displayItems[0] = mergeResult!;
} else {
_displayItems.insert(0, newRecord);
}
});
if (_scrollController.hasClients) {
_scrollController.jumpTo(0.0);
}
return;
}
if (_isAtTop && _scrollController.hasClients) {
_scrollController.jumpTo(0.0);
final anchorModel = _observerController.observeFirstItem();
if (anchorModel == null) {
return;
}
_anchorIndex = anchorModel.index;
if (_anchorIndex! > 0) {
_anchorOffset = anchorModel.layoutOffset;
} else {
_oldCardHeight = anchorModel.size.height;
_oldScrollOffset = _scrollController.offset;
}
bool isMerge = false;
Object? mergeResult;
final firstItem = _displayItems.first;
List<TrainRecord> tempRecords = [newRecord];
if (firstItem is MergedTrainRecord) {
tempRecords.addAll(firstItem.records);
} else if (firstItem is TrainRecord) {
tempRecords.add(firstItem);
}
final mergeCheckResult =
MergeService.getMixedList(tempRecords, _mergeSettings);
if (mergeCheckResult.length == 1 &&
mergeCheckResult.first is MergedTrainRecord) {
isMerge = true;
mergeResult = mergeCheckResult.first;
}
setState(() {
if (isMerge) {
_displayItems[0] = mergeResult!;
} else {
_displayItems.insert(0, newRecord);
}
});
WidgetsBinding.instance.addPostFrameCallback((_) {
if (!mounted || _anchorIndex == null) return;
if (_anchorIndex! > 0) {
final newAnchorIndex = isMerge ? _anchorIndex! : _anchorIndex! + 1;
final newAnchorModel =
_observerController.observeItem(index: newAnchorIndex);
if (newAnchorModel != null && _anchorOffset != null) {
final newOffset = newAnchorModel.layoutOffset;
final delta = newOffset - _anchorOffset!;
if (delta.abs() > 0.1) {
_scrollController.jumpTo(_scrollController.offset + delta);
}
}
} else {
final newAnchorModel = _observerController.observeItem(index: 0);
if (newAnchorModel != null &&
_oldCardHeight != null &&
_oldScrollOffset != null) {
final newHeight = newAnchorModel.size.height;
final heightDelta = newHeight - _oldCardHeight!;
if (heightDelta.abs() > 0.1) {
_scrollController.jumpTo(_oldScrollOffset! + heightDelta);
}
}
}
_anchorIndex = null;
_anchorOffset = null;
_oldCardHeight = null;
_oldScrollOffset = null;
});
}
} catch (e) {}
}
String _getGroupKeyForRecord(TrainRecord record, MergeSettings settings) {
switch (settings.groupBy) {
case GroupBy.trainOnly:
return record.train.trim();
case GroupBy.locoOnly:
return record.loco.trim();
case GroupBy.trainAndLoco:
return '${record.train.trim()}-${record.loco.trim()}';
case GroupBy.trainOrLoco:
final train = record.train.trim();
if (train.isNotEmpty) return train;
final loco = record.loco.trim();
if (loco.isNotEmpty) return loco;
return '';
}
}
bool _hasDataChanged(List<Object> newItems) {
if (_displayItems.length != newItems.length) return true;
@@ -303,7 +358,6 @@ class HistoryScreenState extends State<HistoryScreen> {
if (oldItem.records.length != newItem.records.length) return true;
}
}
return false;
}
@@ -346,6 +400,7 @@ class HistoryScreenState extends State<HistoryScreen> {
mergedRecord.records.any((r) => _selectedRecords.contains(r.uniqueId));
final isExpanded = _expandedStates[mergedRecord.groupKey] ?? false;
return Card(
key: ValueKey(mergedRecord.groupKey),
color: isSelected && _isEditMode
? const Color(0xFF2E2E2E)
: const Color(0xFF1E1E1E),
@@ -389,7 +444,9 @@ class HistoryScreenState extends State<HistoryScreen> {
}
},
onLongPress: () {
if (!_isEditMode) setEditMode(true);
if (!_isEditMode) {
setEditMode(true);
}
setState(() {
final allIdsInGroup =
mergedRecord.records.map((r) => r.uniqueId).toSet();
@@ -488,10 +545,8 @@ class HistoryScreenState extends State<HistoryScreen> {
TrainRecord record, TrainRecord latest, GroupBy groupBy) {
final train = record.train.trim();
final loco = record.loco.trim();
final locoType = record.locoType.trim();
final latestTrain = latest.train.trim();
final latestLoco = latest.loco.trim();
final latestLocoType = latest.locoType.trim();
switch (groupBy) {
case GroupBy.trainOnly:
@@ -530,77 +585,14 @@ class HistoryScreenState extends State<HistoryScreen> {
}
}
double _calculateOptimalZoom(List<LatLng> positions,
{double containerWidth = 400, double containerHeight = 220}) {
if (positions.length == 1) return 17.0;
double minLat = positions[0].latitude;
double maxLat = positions[0].latitude;
double minLng = positions[0].longitude;
double maxLng = positions[0].longitude;
for (final pos in positions) {
minLat = math.min(minLat, pos.latitude);
maxLat = math.max(maxLat, pos.latitude);
minLng = math.min(minLng, pos.longitude);
maxLng = math.max(maxLng, pos.longitude);
}
double latToY(double lat) {
final latRad = lat * math.pi / 180.0;
return math.log(math.tan(latRad) + 1.0 / math.cos(latRad));
}
double lngToX(double lng) {
return lng * math.pi / 180.0;
}
final minX = lngToX(minLng);
final maxX = lngToX(maxLng);
final minY = latToY(minLat);
final maxY = latToY(maxLat);
const worldSize = 2.0 * math.pi;
final widthWorld = (maxX - minX) / worldSize;
final heightWorld = (maxY - minY) / worldSize;
const paddingRatio = 0.8;
final widthZoom =
math.log((containerWidth * paddingRatio) / (widthWorld * 256.0)) /
math.log(2.0);
final heightZoom =
math.log((containerHeight * paddingRatio) / (heightWorld * 256.0)) /
math.log(2.0);
final optimalZoom = math.min(widthZoom, heightZoom);
return math.max(1.0, math.min(20.0, optimalZoom));
}
double _calculateDistance(LatLng pos1, LatLng pos2) {
const earthRadius = 6371000;
final lat1 = pos1.latitude * math.pi / 180;
final lat2 = pos2.latitude * math.pi / 180;
final deltaLat = (pos2.latitude - pos1.latitude) * math.pi / 180;
final deltaLng = (pos2.longitude - pos1.longitude) * math.pi / 180;
final a = math.sin(deltaLat / 2) * math.sin(deltaLat / 2) +
math.cos(lat1) *
math.cos(lat2) *
math.sin(deltaLng / 2) *
math.sin(deltaLng / 2);
final c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a));
return earthRadius * c;
}
String _getLocationInfo(TrainRecord record) {
List<String> parts = [];
if (record.route.isNotEmpty && record.route != "<NUL>")
if (record.route.isNotEmpty && record.route != "<NUL>") {
parts.add(record.route);
if (record.direction != 0) parts.add(record.direction == 1 ? "下" : "上");
}
if (record.direction != 0) {
parts.add(record.direction == 1 ? "下" : "上");
}
if (record.position.isNotEmpty && record.position != "<NUL>") {
final position = record.position;
final cleanPosition = position.endsWith('.')
@@ -616,7 +608,9 @@ class HistoryScreenState extends State<HistoryScreen> {
.map((record) => _parsePosition(record.positionInfo))
.whereType<LatLng>()
.toList();
if (positions.isEmpty) return const SizedBox.shrink();
if (positions.isEmpty) {
return const SizedBox.shrink();
}
final mapId = records.map((r) => r.uniqueId).join('_');
final bounds = LatLngBounds.fromPoints(positions);
@@ -674,12 +668,6 @@ class HistoryScreenState extends State<HistoryScreen> {
]);
}
double _getDefaultZoom(List<LatLng> positions) {
if (positions.length == 1) return 15.0;
if (positions.length < 10) return 12.0;
return 10.0;
}
Future<void> _requestLocationPermission() async {
bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
if (!serviceEnabled) {
@@ -695,23 +683,30 @@ class HistoryScreenState extends State<HistoryScreen> {
return;
}
setState(() {
_isLocationPermissionGranted = true;
});
if (mounted) {
setState(() {
_isLocationPermissionGranted = true;
});
}
_getCurrentLocation();
}
Future<void> _getCurrentLocation() async {
try {
final locationSettings = AndroidSettings(
accuracy: LocationAccuracy.high,
forceLocationManager: true,
);
Position position = await Geolocator.getCurrentPosition(
desiredAccuracy: LocationAccuracy.high,
forceAndroidLocationManager: true,
locationSettings: locationSettings,
);
setState(() {
_currentUserLocation = LatLng(position.latitude, position.longitude);
});
if (mounted) {
setState(() {
_currentUserLocation = LatLng(position.latitude, position.longitude);
});
}
} catch (e) {}
}
@@ -731,10 +726,8 @@ class HistoryScreenState extends State<HistoryScreen> {
final isExpanded =
!isSubCard && (_expandedStates[record.uniqueId] ?? false);
final GlobalKey itemKey = GlobalKey();
final Widget card = Card(
key: key ?? itemKey,
return Card(
key: key,
color: isSelected && _isEditMode
? const Color(0xFF2E2E2E)
: const Color(0xFF1E1E1E),
@@ -762,7 +755,9 @@ class HistoryScreenState extends State<HistoryScreen> {
}
},
onLongPress: () {
if (!_isEditMode) setEditMode(true);
if (!_isEditMode) {
setEditMode(true);
}
setState(() {
_selectedRecords.add(record.uniqueId);
widget.onSelectionChanged();
@@ -778,21 +773,6 @@ class HistoryScreenState extends State<HistoryScreen> {
_buildLocoInfo(record),
if (isExpanded) _buildExpandedContent(record),
]))));
WidgetsBinding.instance.addPostFrameCallback((_) {
if (_itemHeightCache <= 0 && itemKey.currentContext != null) {
final RenderBox renderBox =
itemKey.currentContext!.findRenderObject() as RenderBox;
final double realHeight = renderBox.size.height;
if (realHeight > 0) {
setState(() {
_itemHeightCache = realHeight;
});
}
}
});
return card;
}
Widget _buildRecordHeader(TrainRecord record, {bool isMerged = false}) {
@@ -885,7 +865,9 @@ class HistoryScreenState extends State<HistoryScreen> {
Widget _buildLocoInfo(TrainRecord record) {
final locoInfo = record.locoInfo;
if (locoInfo == null || locoInfo.isEmpty) return const SizedBox.shrink();
if (locoInfo == null || locoInfo.isEmpty) {
return const SizedBox.shrink();
}
return Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
const SizedBox(height: 4),
Text(locoInfo,
@@ -910,8 +892,9 @@ class HistoryScreenState extends State<HistoryScreen> {
.every((r) => r == '*'.runes.first || r == '-'.runes.first) &&
speed != "NUL" &&
speed != "<NUL>";
if (!isValidRoute && !isValidPosition && !isValidSpeed)
if (!isValidRoute && !isValidPosition && !isValidSpeed) {
return const SizedBox.shrink();
}
return Padding(
padding: const EdgeInsets.only(top: 4.0),
child:
@@ -1002,8 +985,11 @@ class HistoryScreenState extends State<HistoryScreen> {
}
LatLng? _parsePosition(String? positionInfo) {
if (positionInfo == null || positionInfo.isEmpty || positionInfo == '<NUL>')
if (positionInfo == null ||
positionInfo.isEmpty ||
positionInfo == '<NUL>') {
return null;
}
try {
final parts = positionInfo.trim().split(RegExp(r'\s+'));
if (parts.length >= 2) {
@@ -1022,14 +1008,22 @@ class HistoryScreenState extends State<HistoryScreen> {
double? _parseDmsCoordinate(String dmsStr) {
try {
final degreeIndex = dmsStr.indexOf('°');
if (degreeIndex == -1) return null;
if (degreeIndex == -1) {
return null;
}
final degrees = double.tryParse(dmsStr.substring(0, degreeIndex));
if (degrees == null) return null;
if (degrees == null) {
return null;
}
final minuteIndex = dmsStr.indexOf('′');
if (minuteIndex == -1) return degrees;
if (minuteIndex == -1) {
return degrees;
}
final minutes =
double.tryParse(dmsStr.substring(degreeIndex + 1, minuteIndex));
if (minutes == null) return degrees;
if (minutes == null) {
return degrees;
}
return degrees + (minutes / 60.0);
} catch (e) {
return null;
@@ -1140,12 +1134,12 @@ class _DelayedMapWithMarker extends StatefulWidget {
final LatLng? currentUserLocation;
const _DelayedMapWithMarker({
Key? key,
super.key,
required this.position,
required this.zoom,
required this.recordId,
this.currentUserLocation,
}) : super(key: key);
});
@override
State<_DelayedMapWithMarker> createState() => _DelayedMapWithMarkerState();
@@ -1175,13 +1169,17 @@ class _DelayedMapWithMarkerState extends State<_DelayedMapWithMarker> {
_mapController.rotate(savedState.bearing);
}
}
setState(() {
_isInitializing = false;
});
if (mounted) {
setState(() {
_isInitializing = false;
});
}
}
void _onCameraMove() {
if (_isInitializing) return;
if (_isInitializing) {
return;
}
final camera = _mapController.camera;
final state = MapState(
@@ -1280,13 +1278,13 @@ class _DelayedMultiMarkerMap extends StatefulWidget {
final LatLng? currentUserLocation;
const _DelayedMultiMarkerMap({
Key? key,
super.key,
required this.positions,
required this.center,
required this.zoom,
required this.groupKey,
this.currentUserLocation,
}) : super(key: key);
});
@override
State<_DelayedMultiMarkerMap> createState() => _DelayedMultiMarkerMapState();
@@ -1318,13 +1316,17 @@ class _DelayedMultiMarkerMapState extends State<_DelayedMultiMarkerMap> {
} else if (mounted) {
_mapController.move(widget.center, widget.zoom);
}
setState(() {
_isInitializing = false;
});
if (mounted) {
setState(() {
_isInitializing = false;
});
}
}
void _onCameraMove() {
if (_isInitializing) return;
if (_isInitializing) {
return;
}
final camera = _mapController.camera;
final state = MapState(
@@ -1352,7 +1354,7 @@ class _DelayedMultiMarkerMapState extends State<_DelayedMultiMarkerMap> {
height: 24,
child: Container(
decoration: BoxDecoration(
color: Colors.red.withOpacity(0.8),
color: Colors.red.withAlpha((255 * 0.8).round()),
shape: BoxShape.circle,
border: Border.all(color: Colors.white, width: 1.5)),
child: const Icon(Icons.train, color: Colors.white, size: 12)))),