290 lines
9.6 KiB
C#
290 lines
9.6 KiB
C#
using System.Windows.Media;
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using AutoMapper;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using DMS.Application.DTOs;
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using DMS.Application.Interfaces;
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using DMS.Application.Interfaces.Database;
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using DMS.Core.Events;
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using DMS.WPF.Interfaces;
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using DMS.WPF.ViewModels.Items;
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using LiveChartsCore;
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using LiveChartsCore.Defaults;
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using LiveChartsCore.SkiaSharpView;
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using LiveChartsCore.SkiaSharpView.Painting;
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using LiveChartsCore.SkiaSharpView.WPF;
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using ObservableCollections;
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using SkiaSharp;
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namespace DMS.WPF.ViewModels;
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partial class VariableHistoryViewModel : ViewModelBase, INavigatable
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{
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private readonly IMapper _mapper;
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private readonly IDialogService _dialogService;
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private readonly IHistoryAppService _historyAppService;
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private readonly IWPFDataService _wpfDataService;
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private readonly IDataStorageService _dataStorageService;
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private readonly IEventService _eventService;
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private readonly INotificationService _notificationService;
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/// <summary>
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/// 历史记录条数限制
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/// </summary>
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[ObservableProperty]
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private int? _historyLimit;
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/// <summary>
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/// 历史记录开始时间
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/// </summary>
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[ObservableProperty]
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private DateTime? _startTime;
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/// <summary>
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/// 历史记录结束时间
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/// </summary>
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[ObservableProperty]
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private DateTime? _endTime;
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/// <summary>
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/// 选中的变量历史记录
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/// </summary>
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[ObservableProperty]
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private VariableItemViewModel _currentVariable;
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/// <summary>
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/// 变量历史记录列表
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/// </summary>
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public NotifyCollectionChangedSynchronizedViewList<VariableHistoryDto> VariableHistories { get; }
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// 折线图相关属性
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public ISeries[] LineSeriesCollection { get; set; }
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[ObservableProperty]
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private Axis[] _lineAxisX;
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[ObservableProperty]
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private Axis[] _lineAxisY;
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private readonly ObservableList<VariableHistoryDto> _variableHistoryList;
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private readonly ISynchronizedView<VariableHistoryDto, VariableHistoryDto> _variableHistorySynchronizedView;
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/// <summary>
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/// 所有变量的缓存列表，用于搜索
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/// </summary>
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private List<VariableHistoryDto> _allVariableHistories;
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public VariableHistoryViewModel(IMapper mapper, IDialogService dialogService, IHistoryAppService historyAppService,
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IWPFDataService wpfDataService, IDataStorageService dataStorageService,
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IEventService eventService,
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INotificationService notificationService)
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{
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_mapper = mapper;
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_dialogService = dialogService;
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_historyAppService = historyAppService;
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_wpfDataService = wpfDataService;
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_dataStorageService = dataStorageService;
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_eventService = eventService;
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_notificationService = notificationService;
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_variableHistoryList = new ObservableList<VariableHistoryDto>();
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_variableHistorySynchronizedView = _variableHistoryList.CreateView(v => v);
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VariableHistories = _variableHistorySynchronizedView.ToNotifyCollectionChanged();
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_allVariableHistories = new List<VariableHistoryDto>();
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// 初始化默认值
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_historyLimit = 50; // 默认限制1000条记录
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_startTime = null;
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_endTime = null;
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// 初始化图表属性
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LineAxisX = new Axis[] { new Axis() };
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LineAxisY = new Axis[] { new Axis() };
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LineSeriesCollection = new ISeries[0];
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_eventService.OnVariableValueChanged += OnVariableValueChanged;
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}
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private void OnVariableValueChanged(object? sender, VariableValueChangedEventArgs e)
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{
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if (e.VariableId != CurrentVariable.Id)
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{
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return;
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}
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var variableHistory = new VariableHistoryDto()
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{
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VariableId = CurrentVariable.Id,
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Timestamp = DateTime.Now,
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Value = e.NewValue
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};
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_variableHistoryList.Add(variableHistory);
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// 更新图表数据
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UpdateChartData();
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}
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/// <summary>
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/// 加载所有变量的历史记录
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/// </summary>
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/// <param name="limit">返回记录的最大数量，null表示无限制</param>
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/// <param name="startTime">开始时间，null表示无限制</param>
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/// <param name="endTime">结束时间，null表示无限制</param>
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private async void LoadAllVariableHistories(int variableId, int? limit = null, DateTime? startTime = null,
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DateTime? endTime = null)
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{
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try
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{
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_variableHistoryList.Clear();
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var allHistories
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= await _historyAppService.GetVariableHistoriesAsync(variableId, limit, startTime, endTime);
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_allVariableHistories = allHistories.ToList();
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_variableHistoryList.AddRange(_allVariableHistories);
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// 更新图表数据
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UpdateChartData();
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}
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catch (Exception ex)
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{
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// 记录更详细的错误信息
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_notificationService.ShowError($"加载变量历史记录失败: {ex.Message}", ex);
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}
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}
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public async Task OnNavigatedToAsync(MenuItemViewModel menu)
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{
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if (_dataStorageService.Variables.TryGetValue(menu.TargetId, out VariableItemViewModel variableItem))
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{
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CurrentVariable = variableItem;
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// 加载所有变量的历史记录
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LoadAllVariableHistories(variableItem.Id, HistoryLimit, StartTime, EndTime);
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}
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}
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/// <summary>
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/// 重新加载历史记录命令
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/// </summary>
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[RelayCommand]
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private void Reload()
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{
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if (CurrentVariable != null)
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{
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LoadAllVariableHistories(CurrentVariable.Id, HistoryLimit, StartTime, EndTime);
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}
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}
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/// <summary>
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/// 根据搜索文本过滤历史记录
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/// </summary>
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/// <param name="searchText"></param>
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private void FilterHistoriesBySearchText(string searchText)
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{
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if (string.IsNullOrWhiteSpace(searchText))
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{
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// 如果搜索文本为空，显示所有历史记录
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_variableHistoryList.Clear();
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_variableHistoryList.AddRange(_allVariableHistories);
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}
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else
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{
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// 根据搜索文本过滤历史记录
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var filteredHistories = _allVariableHistories
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.Where(h =>
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h.VariableName?.Contains(
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searchText, StringComparison.OrdinalIgnoreCase) == true)
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.ToList();
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_variableHistoryList.Clear();
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_variableHistoryList.AddRange(filteredHistories);
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}
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}
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/// <summary>
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/// 根据变量ID加载历史记录
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/// </summary>
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/// <param name="variableId">变量ID</param>
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/// <param name="limit">返回记录的最大数量，null表示无限制</param>
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/// <param name="startTime">开始时间，null表示无限制</param>
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/// <param name="endTime">结束时间，null表示无限制</param>
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public async Task LoadVariableHistoriesAsync(int variableId, int? limit = null, DateTime? startTime = null,
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DateTime? endTime = null)
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{
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try
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{
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_variableHistoryList.Clear();
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var histories = await _historyAppService.GetVariableHistoriesAsync(variableId, limit, startTime, endTime);
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_variableHistoryList.AddRange(histories);
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// 更新图表数据
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UpdateChartData();
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}
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catch (Exception ex)
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{
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// 记录更详细的错误信息
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_notificationService.ShowError($"加载变量历史记录失败: {ex.Message}", ex);
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}
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}
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/// <summary>
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/// 更新图表数据
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/// </summary>
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private void UpdateChartData()
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{
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if (_variableHistoryList == null || _variableHistoryList.Count == 0)
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{
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// 清空图表数据
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LineSeriesCollection = new ISeries[0];
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OnPropertyChanged(nameof(LineSeriesCollection));
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return;
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}
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// 创建数值点集合
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var values = new List<DateTimePoint>();
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foreach (var history in _variableHistoryList)
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{
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// 尝试将值转换为double
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if (double.TryParse(history.Value, out double value))
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{
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values.Add(new DateTimePoint(history.Timestamp, value));
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}
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}
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// 创建线性序列
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var series = new LineSeries<DateTimePoint>
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{
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Name = "变量值",
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Values = values,
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Fill = null,
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Stroke = new SolidColorPaint(new SKColor(41, 128, 185)) { StrokeThickness = 2 },
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GeometrySize = 0 // 不显示数据点，只显示线条
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};
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// 更新序列集合
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LineSeriesCollection = new ISeries[] { series };
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// 更新坐标轴
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LineAxisX = new Axis[]
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{
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new Axis
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{
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Labeler = value => new DateTime((long)value).ToString("MM-dd HH:mm:ss")
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}
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};
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LineAxisY = new Axis[]
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{
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new Axis
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{
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Name = "值"
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}
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};
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// 通知属性更改
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OnPropertyChanged(nameof(LineSeriesCollection));
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OnPropertyChanged(nameof(LineAxisX));
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OnPropertyChanged(nameof(LineAxisY));
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}
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} |