* UILineChart: 增加了一种开关量曲线的显示方式

SunnyUI/Charts/UILineChart.cs

@@ -42,6 +42,7 @@
  * 2022-09-19: V3.2.4 增加鼠标可框选缩放属性MouseZoom
  * 2023-03-26: V3.3.3 自定义X轴坐标时，点数据提示显示为原始值
  * 2023-04-23: V3.3.5 打开Smooth绘制，建议数据差距不大时可平滑绘制
+ * 2023-05-12: V3.3.6 增加了一种开关量曲线的显示方式
 ******************************************************************************/
 
 using System;
@@ -95,6 +96,13 @@ namespace Sunny.UI
                     series.CalcData(this, XScale, Y2Scale);
                 else
                     series.CalcData(this, XScale, YScale);
+
+                if (series is UISwitchLineSeries lineSeries)
+                {
+                    lineSeries.YOffsetPos = series.IsY2 ?
+                        Y2Scale.CalcYPixel(lineSeries.YOffset, DrawOrigin.Y, DrawSize.Height) :
+                        YScale.CalcYPixel(lineSeries.YOffset, DrawOrigin.Y, DrawSize.Height);
+                }
             }
 
             NeedDraw = true;
@@ -481,6 +489,18 @@ namespace Sunny.UI
                 {
                     g.SetHighQuality();
 
+                    if (series is UISwitchLineSeries lineSeries)
+                    {
+                        List<PointF> points = new List<PointF>();
+                        points.Add(new PointF(lineSeries.Points[0].X, lineSeries.YOffsetPos));
+                        points.AddRange(lineSeries.Points);
+                        points.Add(new PointF(lineSeries.Points[series.Points.Count - 1].X, lineSeries.YOffsetPos));
+                        g.FillPath(color, points.ToArray().Path());
+                        g.DrawLine(color, points[0], points[points.Count - 1]);
+                        points.Clear();
+                    }
+                    else
+                    {
                         if (series.ContainsNan || !series.Smooth || series.Points.Count == 2 || ZoomAreas.Count > 5)
                         {
                             for (int i = 0; i < series.Points.Count - 1; i++)
@@ -502,6 +522,7 @@ namespace Sunny.UI
                                 }
                             }
                         }
+                    }
 
                     g.SetDefaultQuality();
                 }

SunnyUI/Charts/UILineChartOption.cs

@@ -107,6 +107,21 @@ namespace Sunny.UI
             return series;
         }
 
+        public UILineSeries AddSwitchLineSeries(string seriesName, float Offset = 0, bool isY2 = false)
+        {
+            if (seriesName.IsNullOrEmpty())
+            {
+                throw new NullReferenceException("seriesName 不能为空");
+            }
+
+            if (ExistsSeries(seriesName)) return Series[seriesName];
+
+            UISwitchLineSeries series = new UISwitchLineSeries(seriesName, isY2);
+            series.YOffset = Offset;
+            AddSeries(series);
+            return series;
+        }
+
         public bool ExistsSeries(string seriesName)
         {
             return seriesName.IsValid() && Series.ContainsKey(seriesName);
@@ -360,6 +375,31 @@ namespace Sunny.UI
 
     }
 
+    public class UISwitchLineSeries : UILineSeries
+    {
+        public UISwitchLineSeries(string name, bool isY2 = false) : base(name, isY2)
+        {
+
+        }
+
+        public UISwitchLineSeries(string name, Color color, bool isY2 = false) : base(name, color, isY2)
+        {
+
+        }
+
+        public UISwitchLineSeries(string name, double yOffset, bool isY2 = false) : base(name, isY2)
+        {
+            YOffset = yOffset;
+        }
+
+        public UISwitchLineSeries(string name, Color color, double yOffset, bool isY2 = false) : base(name, color, isY2)
+        {
+            YOffset = yOffset;
+        }
+
+        internal float YOffsetPos { get; set; }
+    }
+
     public class UILineSeries
     {
         public UILineSeries(string name, bool isY2 = false)
@@ -387,6 +427,8 @@ namespace Sunny.UI
             IsY2 = isY2;
         }
 
+        public double YOffset { get; set; } = 0;
+
         public void SetValueFormat(int xAxisDecimalPlaces, int yAxisDecimalPlaces)
         {
             XAxisDecimalPlaces = xAxisDecimalPlaces;
@@ -481,14 +523,14 @@ namespace Sunny.UI
 
         private readonly List<double> PointsY = new List<double>();
 
-        private int MaxCount = 0;
+        protected int MaxCount = 0;
 
         public void UpdateYData(int index, double value)
         {
             if (YData.Count == 0) return;
             if (index >= 0 && index < YData.Count)
             {
-                YData[index] = value;
+                YData[index] = value + YOffset;
             }
         }
 
@@ -600,7 +642,7 @@ namespace Sunny.UI
             XData.Add(x);
             if (y.IsInfinity()) y = double.NaN;
             if (y.IsNan()) ContainsNan = true;
-            YData.Add(y);
+            YData.Add(y + YOffset);
 
             if (MaxCount > 0 && XData.Count > MaxCount)
                 Remove(1);
@@ -612,7 +654,7 @@ namespace Sunny.UI
             XData.Add(t);
             if (y.IsInfinity()) y = double.NaN;
             if (y.IsNan()) ContainsNan = true;
-            YData.Add(y);
+            YData.Add(y + YOffset);
 
             if (MaxCount > 0 && XData.Count > MaxCount)
                 Remove(1);
@@ -624,7 +666,7 @@ namespace Sunny.UI
             XData.Add(cnt);
             if (y.IsInfinity()) y = double.NaN;
             if (y.IsNan()) ContainsNan = true;
-            YData.Add(y);
+            YData.Add(y + YOffset);
 
             if (MaxCount > 0 && XData.Count > MaxCount)
                 Remove(1);