private void AddStatisticsAnnotations(ChartArea chartArea, int channelIndex)
{RemoveExistingAnnotations(channelIndex);// 获取ChartArea的相对坐标（百分比）float chartAreaX = chartArea.Position.X; // X坐标（百分比）float chartAreaY = chartArea.Position.Y; // Y坐标（百分比）float chartAreaWidth = chartArea.Position.Width; // 宽度（百分比）float chartAreaHeight = chartArea.Position.Height; // 高度（百分比）// 设置相对偏移量（百分比）float offsetX = 10f;  // 水平偏移（百分比）float offsetY = 5f;  // 垂直偏移（百分比）// 计算注释的相对坐标（相对于整个Chart控件）float posX = chartAreaX + offsetX;float posY = chartAreaY + offsetY;// 创建并配置注释Color textColor = _channelColors[channelIndex % _channelColors.Length];// 创建包含所有统计信息的多行文本string annotationText = $"Max: - V\nAvg: - V\nMin: - V";TextAnnotation annotation = new TextAnnotation{Name = $"StatsAnnotation{channelIndex}",Text = annotationText,ForeColor = textColor,X = posX,Y = posY,Alignment = ContentAlignment.TopLeft,ClipToChartArea = chartArea.Name,IsSizeAlwaysRelative = true, // 使用相对坐标Font = new Font("Arial", 10)  // 设置合适的字体大小};chartWaveform.Annotations.Add(annotation);//Console.WriteLine($"Added {annotation.Name} at ({annotation.X}%, {annotation.Y}%)");        
}private void RemoveExistingAnnotations(int channelIndex)
{       // 移除旧的统计注释string annotationName = $"StatsAnnotation{channelIndex}";var annotation = chartWaveform.Annotations.FindByName(annotationName);if (annotation != null){chartWaveform.Annotations.Remove(annotation);}
}private void UpdateChannelStatistics(int channelIndex, List<ushort> values)
{if (values == null || values.Count == 0) return;// 计算统计值double maxAdc = values[0];double minAdc = values[0];double sumAdc = 0;foreach (var value in values){if (value > maxAdc) maxAdc = value;if (value < minAdc) minAdc = value;sumAdc += value;}double avgAdc = sumAdc / values.Count;// 转换为电压值double maxAdcValue = Math.Pow(2, adcBit) - 1;double maxVoltage = vref / 1000.0;double maxV = (maxAdc / maxAdcValue) * maxVoltage;double minV = (minAdc / maxAdcValue) * maxVoltage;double avgV = (avgAdc / maxAdcValue) * maxVoltage;// 更新单个注释的文本UpdateStatsAnnotationText(channelIndex, maxV, avgV, minV);
}private void UpdateStatsAnnotationText(int channelIndex, double maxV, double avgV, double minV)
{string annotationName = $"StatsAnnotation{channelIndex}";var annotation = chartWaveform.Annotations.FindByName(annotationName) as TextAnnotation;if (annotation != null){annotation.Text = $"Max: {maxV:F3}V\nAvg: {avgV:F3}V\nMin: {minV:F3}V";}
}  // 为每个通道添加统计注释
AddStatisticsAnnotations(chartWaveform.ChartAreas[ch], ch);
// 计算并更新统计信息
UpdateChannelStatistics(ch, channelValues[ch]);