1 files changed, 110 insertions, 0 deletions
diff --git a/Software/Visual_Studio/SideChains/RealTimeGraphX/Renderers/GraphEraseRenderer.cs b/Software/Visual_Studio/SideChains/RealTimeGraphX/Renderers/GraphEraseRenderer.cs
new file mode 100644
index 000000000..ae8aeb5e3
--- /dev/null
+++ b/Software/Visual_Studio/SideChains/RealTimeGraphX/Renderers/GraphEraseRenderer.cs
@@ -0,0 +1,110 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RealTimeGraphX.Renderers
+{
+    /// <summary>
+    /// Represents an heart beat monitor style graph renderer.
+    /// </summary>
+    /// <typeparam name="TDataSeries">The type of the graph data series.</typeparam>
+    /// <typeparam name="XDataPoint">The type of the x-axis data point.</typeparam>
+    /// <typeparam name="YDataPoint">The type of the y-axis data point.</typeparam>
+    /// <seealso cref="RealTimeGraphX.GraphRendererBase{TDataSeries, XDataPoint, YDataPoint}" />
+    public class GraphEraseRenderer<TDataSeries, XDataPoint, YDataPoint> : GraphRendererBase<TDataSeries, XDataPoint, YDataPoint> where XDataPoint : GraphDataPointBase where YDataPoint : GraphDataPointBase where TDataSeries : class, IGraphDataSeries
+    {
+        private Dictionary<TDataSeries, int> _series_replace_index_dictionary = new Dictionary<TDataSeries, int>();
+
+        /// <summary>
+        /// Returns an array of absolute graph data points to render.
+        /// This method is called per data series.
+        /// </summary>
+        /// <param name="seriesCollection">A collection of all data series that is currently in the rendering pass.</param>
+        /// <param name="series">The current data series to render.</param>
+        /// <param name="toRender">Pending data series object to render.</param>
+        /// <returns></returns>
+        protected override List<GraphPoint> OnRender(IEnumerable<PendingSeries> seriesCollection, TDataSeries series, PendingSeries toRender)
+        {
+            int replace_index = 0;
+            int new_items = toRender.NewItemsCount;
+
+            if (_series_replace_index_dictionary.ContainsKey(series))
+            {
+                replace_index = _series_replace_index_dictionary[series];
+            }
+            else
+            {
+                _series_replace_index_dictionary.Add(series, 0);
+            }
+
+            XDataPoint min_x = toRender.XX.Min();
+            XDataPoint max_x = toRender.XX.Max();
+
+            YDataPoint min_y = Input.Range.MinimumY;
+            YDataPoint max_y = Input.Range.MaximumY;
+
+            if (Input.Range.AutoY)
+            {
+                min_y = seriesCollection.SelectMany(x => x.YY).Min();
+                max_y = seriesCollection.SelectMany(x => x.YY).Max();
+            }
+
+            var min_x_erase = Input.Range.MaximumX > max_x ? min_x : max_x - Input.Range.MaximumX;
+
+            OnEffectiveRangeXChanged(min_x_erase, max_x);
+            OnEffectiveRangeYChanged(min_y, max_y);
+
+            if (max_x - min_x > Input.Range.MaximumX)
+            {
+                for (int i = 0; i < new_items; i++)
+                {
+                    int value_index = toRender.XX.Count - new_items + i;
+
+                    toRender.YY[replace_index++] = toRender.YY[value_index];
+                    toRender.XX.RemoveAt(value_index);
+                    toRender.YY.RemoveAt(value_index);
+
+                    if (replace_index >= toRender.XX.Count)
+                    {
+                        replace_index = 0;
+
+                        if (series == _series_replace_index_dictionary.Last().Key)
+                        {
+                            foreach (var s in _series_replace_index_dictionary.Keys.ToList())
+                            {
+                                _series_replace_index_dictionary[s] = replace_index;
+                            }
+                        }
+                    }
+                }
+            }
+
+            min_x = toRender.XX.Min();
+            max_x = toRender.XX.Max();
+
+            var dxList = toRender.XX.Select(x => x.ComputeRelativePosition(min_x, max_x)).ToList();
+            var dyList = toRender.YY.Select(x => x.ComputeRelativePosition(min_y, max_y)).ToList();
+
+            List<GraphPoint> points = new List<GraphPoint>();
+
+            for (int i = 0; i < dxList.Count; i++)
+            {
+                float image_x = ConvertXValueToRendererValue(dxList[i]);
+                float image_y = ConvertYValueToRendererValue(dyList[i]);
+
+                GraphPoint point = new GraphPoint(image_x, image_y);
+                points.Add(point);
+            }
+
+            CurrentXPosition = points[replace_index].X;
+
+            _series_replace_index_dictionary[series] = replace_index;
+
+            return points;
+        }
+    }
+}