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重构历史记录条数

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This commit is contained in:
David P.G
2025-10-03 13:40:06 +08:00
parent 30f6019b92
commit c1818a0c85
1 changed files with 51 additions and 42 deletions
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71
DMS.WPF/ViewModels/VariableHistoryViewModel.cs
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@@ -30,10 +30,16 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
private readonly INotificationService _notificationService;
/// <summary>
/// 历史记录条数限制
/// 加载历史记录条数限制
/// </summary>
[ObservableProperty]
private int? _historyLimit;
private int? _initHistoryLimit;
/// <summary>
/// 显示历史记录条数限制
/// </summary>
[ObservableProperty]
private int? _viewHistoryLimit;
/// <summary>
/// 历史记录开始时间
@@ -94,7 +100,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
_allVariableHistories = new List<VariableHistoryDto>();
// 初始化默认值
_historyLimit = 50; // 默认限制1000条记录
_initHistoryLimit = 50; // 默认限制1000条记录
_startTime = null;
_endTime = null;
@@ -123,13 +129,13 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
_variableHistoryList.Add(variableHistory);
// 限制历史记录数量以防止内存溢出
if (HistoryLimit.HasValue && _variableHistoryList.Count > HistoryLimit.Value)
if (ViewHistoryLimit.HasValue && _variableHistoryList.Count > ViewHistoryLimit.Value)
{
// 移除最旧的记录
_variableHistoryList.RemoveAt(0);
}
// 更新图表数据
// 更新图表数据 - 使用更高效的方法处理实时更新
UpdateChartData();
}
@@ -147,7 +153,8 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
_variableHistoryList.Clear();
var allHistories
= await _historyAppService.GetVariableHistoriesAsync(variableId, limit, startTime, endTime);
_allVariableHistories = allHistories.ToList();
_allVariableHistories = allHistories.OrderBy(v => v.Timestamp)
.ToList();
_variableHistoryList.AddRange(_allVariableHistories);
// 更新图表数据
@@ -167,7 +174,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
{
CurrentVariable = variableItem;
// 加载所有变量的历史记录
LoadAllVariableHistories(variableItem.Id, HistoryLimit, StartTime, EndTime);
LoadAllVariableHistories(variableItem.Id, InitHistoryLimit, StartTime, EndTime);
}
}
@@ -179,7 +186,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
{
if (CurrentVariable != null)
{
LoadAllVariableHistories(CurrentVariable.Id, HistoryLimit, StartTime, EndTime);
LoadAllVariableHistories(CurrentVariable.Id, InitHistoryLimit, StartTime, EndTime);
}
}
@@ -240,6 +247,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
private Axis[] _lineAxisXInstance;
private Axis[] _lineAxisYInstance;
/// <summary>
/// 更新图表数据
/// </summary>
@@ -266,35 +274,36 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
// 创建线性序列
var series = new LineSeries<DateTimePoint>
{
Name = CurrentVariable?.Name ?? "变量值",
Values = values,
Fill = null,
Stroke = new SolidColorPaint(new SKColor(41, 128, 185)) { StrokeThickness = 2 },
GeometrySize = 6, // 显示数据点，圆点大小为6
LineSmoothness = 0 // 使用直线连接点，也可以设为其他值实现曲线
};
{
Name = CurrentVariable?.Name ?? "变量值",
Values = values,
Fill = null,
Stroke = new SolidColorPaint(new SKColor(41, 128, 185)) { StrokeThickness = 2 },
GeometrySize = 6, // 显示数据点，圆点大小为6
LineSmoothness = 5 // 使用直线连接点，也可以设为其他值实现曲线
};
// 更新序列集合
LineSeriesCollection = new ISeries[] { series };
// 初始化坐标轴并保存实例引用
_lineAxisXInstance = new Axis[]
{
new Axis
{
Labeler = value => new DateTime((long)value).ToString("MM-dd HH:mm:ss")
}
};
{
new Axis
{
Labeler = value => new DateTime((long)value).ToString("MM-dd HH:mm:ss"),
// 不设置固定范围，让图表根据数据自动调整
}
};
_lineAxisYInstance = new Axis[]
{
new Axis
{
Name = CurrentVariable?.Name ?? "值",
// MinLimit = 0 // 设置Y轴从0开始
}
};
{
new Axis
{
Name = CurrentVariable?.Name ?? "值",
MinLimit = 0 // 设置Y轴从0开始
}
};
// 设置属性值
LineAxisX = _lineAxisXInstance;
@@ -314,7 +323,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
foreach (var history in _variableHistoryList)
{
// 尝试将值转换为double
values.Add(new DateTimePoint(history.Timestamp, history.NumericValue));
values.Add(new DateTimePoint(history.Timestamp, history.NumericValue));
}
// 更新当前系列
@@ -323,7 +332,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
currentSeries.Name = CurrentVariable?.Name ?? "变量值";
// 通知系列更改，但保留当前轴的缩放状态（不需要更新轴）
OnPropertyChanged(nameof(LineSeriesCollection));
// OnPropertyChanged(nameof(LineSeriesCollection));
}
}
}