451 lines
16 KiB
C#
451 lines
16 KiB
C#
using OxyPlot;
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using OxyPlot.Axes;
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using OxyPlot.Legends;
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using OxyPlot.Series;
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using System.Collections.ObjectModel;
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using System.Reflection;
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using System.Windows.Input;
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using System.Windows.Threading;
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using UIShare.GlobalVariable;
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using UIShare.PubEvent;
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using UIShare.ViewModelBase;
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using Prism.Mvvm;
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using Common.Attributes;
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namespace MonitorModule.ViewModels
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{
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public class MonitorViewModel : NavigateViewModelBase, IRegionMemberLifetime, IDisposable
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{
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#region 属性
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public bool KeepAlive => true;
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public ScopedContext _scopedContext { get; set; }
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public GlobalInfo _globalInfo { get; set; }
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public string TestStatus
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{
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get => _testStatus;
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set => SetProperty(ref _testStatus, value);
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}
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public PlotModel Plot { get; }
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/// <summary>已添加的监测通道列表</summary>
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public ObservableCollection<MonitorChannel> Channels { get; } = new();
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/// <summary>可添加的设备方法列表（供用户选择）</summary>
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public ObservableCollection<AvailableMethodItem> AvailableMethods { get; } = new();
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private MonitorChannel? _selectedChannel;
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public MonitorChannel? SelectedChannel
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{
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get => _selectedChannel;
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set => SetProperty(ref _selectedChannel, value);
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}
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private AvailableMethodItem? _selectedAvailableMethod;
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public AvailableMethodItem? SelectedAvailableMethod
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{
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get => _selectedAvailableMethod;
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set => SetProperty(ref _selectedAvailableMethod, value);
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}
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public string StatusMessage
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{
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get => _statusMessage;
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set => SetProperty(ref _statusMessage, value);
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}
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#endregion
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#region 命令
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public ICommand AddChannelCommand { get; }
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public ICommand DeleteChannelCommand { get; }
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public ICommand ResetViewCommand { get; }
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public ICommand RefreshDataCommand { get; }
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public ICommand RefreshCommand { get; }
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#endregion
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#region 私有字段
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private bool IsInitiated = false;
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private IScopedProvider _scope;
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private DeviceManager? _deviceManager;
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private static readonly OxyColor[] _palette =
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{
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OxyColors.SteelBlue, OxyColors.IndianRed, OxyColors.SeaGreen,
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OxyColors.DarkOrange, OxyColors.MediumPurple, OxyColors.Goldenrod,
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OxyColors.Teal, OxyColors.Crimson, OxyColors.OliveDrab
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};
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private int _colorIndex;
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private readonly DispatcherTimer _sampleTimer;
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private double _sampleTime;
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private const double _sampleInterval = 0.1; // 100ms
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private string _testStatus = string.Empty;
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private string _statusMessage = "图表已就绪，暂无监测项";
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/// <summary>反射方法缓存：Channel → (MethodInfo, DeviceInstance)</summary>
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private readonly Dictionary<MonitorChannel, (MethodInfo Method, object Device)> _methodCache = new();
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/// <summary>方法名前缀：匹配这些开头的公共方法被视为可监测项</summary>
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private static readonly string[] _methodPrefixes = { "查询", "读取", "获取", "测量" };
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#endregion
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public MonitorViewModel(IContainerExtension container) : base(container)
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{
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_globalInfo = container.Resolve<GlobalInfo>();
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Plot = BuildEmptyPlot();
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AddChannelCommand = new DelegateCommand(OnAddChannel);
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DeleteChannelCommand = new DelegateCommand(OnDeleteChannel);
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ResetViewCommand = new DelegateCommand(OnResetView);
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RefreshDataCommand = new DelegateCommand(OnRefreshData);
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RefreshCommand = new DelegateCommand(OnExpand);
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_sampleTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(_sampleInterval) };
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_sampleTimer.Tick += OnSampleTick;
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}
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public void Dispose()
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{
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_sampleTimer?.Stop();
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_scope?.Dispose();
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}
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#region PlotModel 构建
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private static PlotModel BuildEmptyPlot()
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{
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var pm = new PlotModel
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{
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Title = string.Empty,
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PlotAreaBorderColor = OxyColors.LightGray,
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Background = OxyColors.White
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};
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pm.Axes.Add(new LinearAxis
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{
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Position = AxisPosition.Bottom,
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Title = "时间 (s)",
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MajorGridlineStyle = LineStyle.Dot,
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MinorGridlineStyle = LineStyle.None
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});
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pm.Axes.Add(new LinearAxis
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{
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Position = AxisPosition.Left,
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Title = "值",
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MajorGridlineStyle = LineStyle.Dot,
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MinorGridlineStyle = LineStyle.None
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});
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pm.Legends.Add(new Legend
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{
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LegendPosition = LegendPosition.RightTop,
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LegendBackground = OxyColor.FromAColor(200, OxyColors.White),
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LegendBorder = OxyColors.LightGray
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});
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return pm;
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}
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#endregion
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#region 设备方法发现
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/// <summary>
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/// 扫描 DeviceManager.DeviceMap 中所有设备，反射找出可监测的方法。
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/// </summary>
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private void DiscoverAvailableMethods()
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{
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AvailableMethods.Clear();
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if (_deviceManager?.DeviceMap == null || _deviceManager.DeviceMap.Count == 0)
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{
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StatusMessage = "当前工位无可用设备";
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return;
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}
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foreach (var kvp in _deviceManager.DeviceMap)
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{
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string deviceName = kvp.Key;
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var device = kvp.Value;
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var deviceType = device.GetType();
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// 核心优化：直接通过特性和参数过滤方法
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var methods = deviceType.GetMethods(BindingFlags.Public | BindingFlags.Instance)
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.Where(m =>
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{
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// 1. 核心过滤：必须包含 [Monitorable] 特性
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var attribute = m.GetCustomAttribute<MonitorableAttribute>();
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if (attribute == null) return false;
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// 2. 返回类型校验（如果强制要求是 Task<string>）
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if (m.ReturnType != typeof(Task<string>)) return false;
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// 3. 参数校验：只取无参或仅有 CancellationToken 参数的方法
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var parms = m.GetParameters();
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bool validParams = parms.Length == 0 ||
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(parms.Length == 1 && parms[0].ParameterType == typeof(CancellationToken));
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return validParams;
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});
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foreach (var method in methods)
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{
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// 如果你在特性里写了 Description，这里可以拿出来赋给 DisplayName
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var attr = method.GetCustomAttribute<MonitorableAttribute>();
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string displayName = !string.IsNullOrEmpty(attr?.Description)
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? $"{deviceName}.{attr.Description}"
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: $"{deviceName}.{method.Name}";
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var item = new AvailableMethodItem
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{
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DeviceName = deviceName,
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MethodName = method.Name,
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DisplayName = displayName, // 优先使用特性的中文描述
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MethodInfo = method,
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Device = device
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};
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AvailableMethods.Add(item);
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}
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}
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StatusMessage = AvailableMethods.Count > 0
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? $"发现 {AvailableMethods.Count} 个可监测项"
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: "未发现可监测的设备方法";
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}
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#endregion
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#region 命令处理
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private void OnAddChannel()
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{
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var method = SelectedAvailableMethod;
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if (method == null)
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{
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StatusMessage = "请先在列表中选择一个监测项";
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return;
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}
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// 防止重复添加同一设备方法
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if (Channels.Any(c => c.DeviceName == method.DeviceName && c.MethodName == method.MethodName))
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{
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StatusMessage = $"监测项 [{method.DisplayName}] 已存在";
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return;
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}
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var color = _palette[_colorIndex % _palette.Length];
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_colorIndex++;
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var channel = new MonitorChannel
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{
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DeviceName = method.DeviceName,
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MethodName = method.MethodName,
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DisplayName = method.DisplayName,
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Color = color,
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IsMonitored = true,
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IsDisplayed = true
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};
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// 创建 Series 并加入 Plot
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channel.Series = new LineSeries
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{
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Title = channel.DisplayName,
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Color = color,
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StrokeThickness = 1.5
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};
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Plot.Series.Add(channel.Series);
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// 缓存反射信息
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_methodCache[channel] = (method.MethodInfo, method.Device);
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// 订阅属性变化：IsDisplayed 控制显示/隐藏，MathExpression 控制数学变换
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channel.PropertyChanged += (s, e) =>
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{
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if (e.PropertyName == nameof(MonitorChannel.IsDisplayed))
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OnChannelDisplayChanged(channel);
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else if (e.PropertyName == nameof(MonitorChannel.MathExpression))
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OnChannelMathChanged(channel);
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};
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Channels.Add(channel);
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SelectedChannel = channel;
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Plot.InvalidatePlot(true);
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StatusMessage = $"已添加监测项 [{channel.DisplayName}]，当前共 {Channels.Count} 项";
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}
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private void OnDeleteChannel()
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{
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var target = SelectedChannel ?? Channels.LastOrDefault();
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if (target == null)
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{
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StatusMessage = "无可删除的监测项";
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return;
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}
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if (target.Series != null)
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{
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Plot.Series.Remove(target.Series);
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}
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_methodCache.Remove(target);
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Channels.Remove(target);
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SelectedChannel = Channels.LastOrDefault();
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Plot.InvalidatePlot(true);
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StatusMessage = $"已删除监测项 [{target.DisplayName}]，剩余 {Channels.Count} 项";
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}
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private void OnResetView()
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{
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Plot.ResetAllAxes();
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Plot.InvalidatePlot(false);
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StatusMessage = "视图已按数据范围复原";
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}
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private void OnRefreshData()
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{
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Plot.InvalidatePlot(true);
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StatusMessage = $"已刷新（{DateTime.Now:HH:mm:ss}）";
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}
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private void OnExpand()
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{
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if (string.IsNullOrEmpty(TestStatus)) return;
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_globalInfo.CurrentScope = TestStatus;
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_eventAggregator.GetEvent<ExpandViewEvent>().Publish(TestStatus);
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}
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#endregion
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#region 显示/隐藏切换
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/// <summary>
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/// 当 Channel.IsDisplayed 变化时调用：控制 Series 的创建/移除
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/// </summary>
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public void OnChannelDisplayChanged(MonitorChannel channel)
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{
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if (channel.IsDisplayed)
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{
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// 从 false → true：创建 Series，回填最近数据
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if (channel.Series == null)
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{
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channel.Series = new LineSeries
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{
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Title = channel.DisplayName,
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Color = channel.Color,
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StrokeThickness = 1.5
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};
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// 回填最近 200 个数据点
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var recent = channel.DataPoints.ToArray();
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var startIdx = Math.Max(0, recent.Length - 200);
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for (int i = startIdx; i < recent.Length; i++)
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{
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channel.Series.Points.Add(new DataPoint(recent[i].Time, recent[i].DisplayValue));
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}
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Plot.Series.Add(channel.Series);
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Plot.InvalidatePlot(true);
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}
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}
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else
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{
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// 从 true → false：移除 Series，数据继续记录
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if (channel.Series != null)
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{
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Plot.Series.Remove(channel.Series);
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channel.Series = null;
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Plot.InvalidatePlot(true);
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}
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}
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}
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/// <summary>
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/// 当 Channel.MathExpression 变化时调用：重新计算所有已记录数据点的 DisplayValue
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/// </summary>
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public void OnChannelMathChanged(MonitorChannel channel)
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{
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if (channel.Series == null) return;
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// 用新表达式重算 Series 中的点
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var points = channel.DataPoints.ToArray();
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channel.Series.Points.Clear();
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var startIdx = Math.Max(0, points.Length - 200);
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for (int i = startIdx; i < points.Length; i++)
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{
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channel.Series.Points.Add(new DataPoint(points[i].Time, points[i].DisplayValue));
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}
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Plot.InvalidatePlot(true);
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}
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#endregion
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#region 采样定时器
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private async void OnSampleTick(object? sender, EventArgs e)
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{
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_sampleTime += _sampleInterval;
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if (Channels.Count == 0 || _methodCache.Count == 0) return;
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foreach (var channel in Channels)
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{
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if (!channel.IsMonitored) continue;
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if (!_methodCache.TryGetValue(channel, out var entry)) continue;
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try
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{
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var (method, device) = entry;
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// 调用设备方法获取返回值
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var task = (Task<string>)method.Invoke(device, null)!;
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var raw = await task.ConfigureAwait(true);
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// 尝试解析为 double
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if (double.TryParse(raw, out double value))
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{
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channel.Record(_sampleTime, value);
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}
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}
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catch
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{
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// 设备读取失败时跳过该通道本次采样
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}
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}
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// 让 X 轴跟随最新数据滚动
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var xAxis = Plot.Axes.FirstOrDefault(a => a.Position == AxisPosition.Bottom);
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if (xAxis != null)
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{
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double window = 200 * _sampleInterval;
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xAxis.Minimum = Math.Max(0, _sampleTime - window);
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xAxis.Maximum = _sampleTime + 0.5;
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}
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Plot.InvalidatePlot(true);
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}
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#endregion
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#region 重写
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public override void OnNavigatedTo(NavigationContext navigationContext)
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{
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base.OnNavigatedTo(navigationContext);
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if (!IsInitiated && navigationContext.Parameters.ContainsKey("Name"))
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{
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TestStatus = navigationContext.Parameters.GetValue<string>("Name");
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Plot.Title = $"监控 - {TestStatus}";
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Plot.InvalidatePlot(false);
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_scope = _globalInfo.ScopeDic[TestStatus];
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_scopedContext = _scope.Resolve<ScopedContext>();
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_deviceManager = _scope.Resolve<DeviceManager>();
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IsInitiated = true;
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// 扫描可用监测项
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DiscoverAvailableMethods();
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// 启动采样定时器
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_sampleTimer.Start();
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}
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}
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#endregion
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}
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/// <summary>
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/// 可用设备方法项（供用户选择添加为监测通道）
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/// </summary>
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public class AvailableMethodItem
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{
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public string DeviceName { get; set; } = string.Empty;
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public string MethodName { get; set; } = string.Empty;
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public string DisplayName { get; set; } = string.Empty;
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public MethodInfo MethodInfo { get; set; } = null!;
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public object Device { get; set; } = null!;
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}
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}
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