feat(chart): 实现Ploss和Qfod图表真实数据加载

src/WCTDataMiner.Wpf/ViewModels/QfodChartViewModel.cs

@@ -1,8 +1,11 @@
 using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using CommunityToolkit.Mvvm.Messaging;
 using LiveChartsCore;
 using LiveChartsCore.SkiaSharpView;
 using Microsoft.Extensions.Logging;
 using WCTDataMiner.Core.Services;
+using WCTDataMiner.Wpf.Messages;
 
 namespace WCTDataMiner.Wpf.ViewModels;
 
@@ -26,6 +29,12 @@ public partial class QfodChartViewModel : ObservableObject
     [ObservableProperty]
     private Axis[] _yAxes;
 
+    [ObservableProperty]
+    private bool _isLoading;
+
+    [ObservableProperty]
+    private string _loadingMessage = "";
+
     public QfodChartViewModel(
         ScenarioService scenarioService,
         ILogger<QfodChartViewModel> logger)
@@ -39,28 +48,97 @@ public partial class QfodChartViewModel : ObservableObject
         YAxes = new Axis[] { new Axis { Name = "Q Value" } };
     }
 
+    /// <summary>
+    /// ScenarioId 属性变更时自动触发数据加载
+    /// </summary>
+    partial void OnScenarioIdChanged(Guid value)
+    {
+        if (value != Guid.Empty)
+        {
+            _ = LoadDataAsync().ContinueWith(t =>
+            {
+                if (t.Exception != null)
+                {
+                    _logger.LogError(t.Exception, "LoadDataAsync 失败: ScenarioId={ScenarioId}", value);
+                }
+            }, TaskContinuationOptions.OnlyOnFaulted);
+        }
+    }
+
+    [RelayCommand]
+    private void SwitchToTable()
+    {
+        WeakReferenceMessenger.Default.Send(new NavigateToQfodTableMessage(ScenarioId));
+    }
+
     public async Task LoadDataAsync()
     {
+        if (IsLoading) return; // 防并发
+
+        IsLoading = true;
+        LoadingMessage = "正在加载数据...";
+
         try
         {
-            // TODO: 从数据库加载 Qfod 数据并构建图表
+            var records = await _scenarioService.GetQfodRecordsByScenarioIdAsync(ScenarioId);
+
+            if (records.Count == 0)
+            {
+                Series = Array.Empty<ISeries>();
+                _logger.LogWarning("未找到 Qfod 数据: ScenarioId={ScenarioId}", ScenarioId);
+                LoadingMessage = "无数据";
+                return;
+            }
+
+            // 构建 DeltaQ、CurrentQ、RawQ 三条曲线
+            var deltaQValues = records.Select(r => (double)r.DeltaQ).ToArray();
+            var currentQValues = records.Select(r => (double)r.CurrentQ).ToArray();
+            var rawQValues = records.Select(r => (double)r.RawQ).ToArray();
+            var coilLabels = records.Select(r => $"{r.ChargerIndex}-{r.CoilIndex}").ToArray();
+
             Series = new ISeries[]
             {
                 new LineSeries<double>
                 {
                     Name = "DeltaQ",
-                    Values = new double[] { 25, 30, 28 }
+                    Values = deltaQValues,
+                    GeometrySize = 5
                 },
                 new LineSeries<double>
                 {
                     Name = "CurrentQ",
-                    Values = new double[] { 45.5, 50.2, 48.8 }
+                    Values = currentQValues,
+                    GeometrySize = 5
+                },
+                new LineSeries<double>
+                {
+                    Name = "RawQ",
+                    Values = rawQValues,
+                    GeometrySize = 5
                 }
             };
+
+            // 更新 X 轴标签
+            XAxes = new Axis[]
+            {
+                new Axis
+                {
+                    Name = "Charger-Coil Index",
+                    Labels = coilLabels
+                }
+            };
+
+            _logger.LogInformation("加载 Qfod 图表数据成功: ScenarioId={ScenarioId}, 记录数={Count}", ScenarioId, records.Count);
+            LoadingMessage = "";
         }
         catch (Exception ex)
         {
             _logger.LogError(ex, "加载 Qfod 图表数据失败: ScenarioId={ScenarioId}", ScenarioId);
+            LoadingMessage = $"加载失败: {ex.Message}";
+        }
+        finally
+        {
+            IsLoading = false;
         }
     }
-}
+}