Avalonia/PortfolioManager/ViewModels/ScottPlotViewModel.cs

using System;
using Avalonia.Media;
using Eremex.AvaloniaUI.Charts;
using MarketData.DataAccess;
using MarketData.Generator;
using MarketData.MarketDataModel;
using PortfolioManager.DataSeriesViewModels;
using PortfolioManager.Models;
using ScottPlot;
using ScottPlot.Avalonia;
using ScottPlot.Plottables;
using ShimSkiaSharp;
using SkiaSharp;

namespace PortfolioManager.ViewModels
{
  public class BollingerBandCompositeDataSourceGenerater
  {
    public BollingerBandCompositeDataSourceGenerater()
    {
    }

    public void Render(AvaPlot plotter)
    {
      plotter.Plot.Axes.AutoScale();
      plotter.Refresh();             
    }

    public void SetData(String selectedSymbol, int selectedDayCount, AvaPlot plotter)
    {
      Prices prices = PricingDA.GetPrices(selectedSymbol, selectedDayCount);
      BollingerBands bollingerBands = BollingerBandGenerator.GenerateBollingerBands(prices);

      // calculate the break even price on the open trades for this symbol
      PortfolioTrades portfolioTrades = PortfolioDA.GetTradesSymbol(selectedSymbol);
      PortfolioTrades openTrades = portfolioTrades.GetOpenTrades();
      DateTime latestPricingDate = PricingDA.GetLatestDate(selectedSymbol);
      Price latestPrice = PricingDA.GetPrice(selectedSymbol, latestPricingDate);
      Price zeroPrice = ParityGenerator.GenerateGainLossValue(openTrades, latestPrice);
      GenerateCompositeDataSources(plotter, bollingerBands);
      GenerateZeroPoint(plotter, zeroPrice);
    }

    private void GenerateZeroPoint(AvaPlot plotter, Price zeroPrice)
    {
      ZeroPoint = GainLossModel.Price(zeroPrice);
      (DateTime[] dates, double[] values) = ZeroPoint.ToXYData();

      Scatter scatter = plotter.Plot.Add.Scatter(dates, values, ScottPlot.Color.FromSKColor(SKColors.Blue));
      // Marker marker = plotter.Plot.Add.Marker(dates[0].ToOADate(), values[0] / 1.025);
      // marker.MarkerFillColor = ScottPlot.Color.FromSKColor(SKColors.Blue);
      // marker.MarkerStyle.Shape = MarkerShape.TriUp;
      // marker.MarkerStyle.Size = 15;

      IImage image = TextMarkerImageGenerator.GenerateImage("Even $52.14 (+.25%");
      Coordinates coordinates = new Coordinates(dates[0].ToOADate(), values[0] / 1.025);
      Marker marker = plotter.Plot.Add.ImageMarker(coordinates, image);
      Image image = default;




//      Marker marker=plotter.Plot.Add.Marker(K.DataAdapter.ItemCount-1,values[0]);
      //      Marker marker=plotter.Plot.Add.Marker(0,values[0]);
      //      marker.MarkerFillColor = ScottPlot.Color.FromSKColor(SKColors.Blue);
      //      marker.MarkerStyle.Shape = MarkerShape.TriUp;
      //      marker.MarkerStyle.Size = 15;
    }

    private void GenerateCompositeDataSources(AvaPlot plotter, BollingerBands bollingerBands)
    {
      K = BollingerBandModel.K(bollingerBands);
      KL1 = BollingerBandModel.KL1(bollingerBands);
      L = BollingerBandModel.L(bollingerBands);
      LP1 = BollingerBandModel.LP1(bollingerBands);
      High = BollingerBandModel.High(bollingerBands);
      Low = BollingerBandModel.Low(bollingerBands);
      Close = BollingerBandModel.Close(bollingerBands);
      SMAN = BollingerBandModel.SMAN(bollingerBands);
      Volume = BollingerBandModel.Volume(bollingerBands);
      LeastSquares = BollingerBandModel.LeastSquares(bollingerBands);

      Scatter scatter = default;
      {
        (DateTime[] dates, double[] values) = K.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Green));
        scatter.LegendText = "K";
        scatter.LineWidth = 3;
      }

      {
        (DateTime[] dates, double[] values) = KL1.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Green));
        scatter.LegendText = "KL1";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = L.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Green));
        scatter.LegendText = "L";
        scatter.LineWidth = 3;
      }

      {
        (DateTime[] dates, double[] values) = LP1.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Green));
        scatter.LegendText = "LP1";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = High.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Blue));
        scatter.LegendText = "High";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = Low.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Red));
        scatter.LegendText = "Low";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = Close.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Black));
        scatter.LegendText = "Close";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = LeastSquares.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Orange));
        scatter.LegendText = "LeastSquares";
        scatter.LineWidth = 2;
      }

      {
        (DateTime[] dates, double[] values) = SMAN.ToXYData();
        scatter = plotter.Plot.Add.ScatterLine(dates, values, ScottPlot.Color.FromSKColor(SKColors.Purple));
        scatter.LegendText = "SMAN";
        scatter.LineWidth = 2;
      }
    }

      public CompositeDataSource K { get; private set; } = Empty();
      public CompositeDataSource KL1 { get; private set; } = Empty();
      public CompositeDataSource L { get; private set; } = Empty();
      public CompositeDataSource LP1 { get; private set; } = Empty();
      public CompositeDataSource High { get; private set; } = Empty();
      public CompositeDataSource Low { get; private set; } = Empty();
      public CompositeDataSource Close { get; private set; } = Empty();
      public CompositeDataSource SMAN { get; private set; } = Empty();
      public CompositeDataSource Volume { get; private set; } = Empty();
      public CompositeDataSource LeastSquares { get; private set; } = Empty();
      public CompositeDataSource ZeroPoint { get; private set; } = Empty();
      
      private static CompositeDataSource Empty()
        {
            return new CompositeDataSource()
            {
                DataAdapter = new SortedDateTimeDataAdapter()
            };
        }      
    }
 
    public partial class ScottPlotViewModel : PlotterWorkspaceViewModel
    {
        private AvaPlot plotter = default;
        public ScottPlotViewModel()
        {
            OnPlotterLoadedEventHandler += PlotterLoadedEvent;
        }

        public void PlotterLoadedEvent(object sender, PlotterLoadedEventArgs e)
        {
            String selectedSymbol = "SPY";
            int selectedDayCount = 180;

            plotter = e.AvaPlot;   // we should store this somewhere
            // Prices prices = PricingDA.GetPrices("SPY", 180);
            // BollingerBands bollingerBands = BollingerBandGenerator.GenerateBollingerBands(prices);

            BollingerBandCompositeDataSourceGenerater bollingerBandCompositeDataSourceGenerater = new BollingerBandCompositeDataSourceGenerater();
      bollingerBandCompositeDataSourceGenerater.SetData(selectedSymbol, selectedDayCount, plotter);
//public void SetData(String selectedSymbol, int selectedDayCount, AvaPlot plotter)

//            bollingerBandCompositeDataSourceGenerater.GenerateCompositeDataSources(plotter, bollingerBands);
            bollingerBandCompositeDataSourceGenerater.Render(plotter);
            // plotter.Plot.Axes.AutoScale();
            // plotter.Refresh();             
        }
        // ********************************************** P E R S I S T E N C E *************************
        public override bool CanPersist()
        {
            return false;
        }

        public override SaveParameters GetSaveParameters()
        {
            return null;
        }

        public override void SetSaveParameters(SaveParameters saveParameters)
        {
        }
    }
}