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refactoring

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Miha Kralj
2025-12-16 21:16:50 -08:00
parent a67ad65fa5
commit d277e08056
137 changed files with 5074 additions and 3178 deletions
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quantower/IndicatorExtensions.cs
+446 -287
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using TradingPlatform.BusinessLayer;
using TradingPlatform.BusinessLayer.Chart;
using System.Drawing;
using System.Drawing.Drawing2D;
#nullable disable
namespace QuanTAlib;
public enum SourceType
{
Open, High, Low, Close, HL2, OC2, OHL3, HLC3, OHLC4, HLCC4
}
public enum MaType
{
Alma, Dema, Dsma, Dwma, Ema, Epma, Frama, Fwma, Gma, Hma, Hwma, Jma, Kama, Maaf, Mgdi, MMa, Pwma, Rema, Rma, Sinema, Sma, Smma, T3, Tema, Trima, Vidya, Wma, Zlema
}
public static class IndicatorExtensions
{
public static readonly Color Averages = Color.FromArgb(255, 255, 128); // #FFFF80 - Yellow
public static readonly Color Volume = Color.FromArgb(128, 255, 128); // #80FF80 - Green
public static readonly Color Volatility = Color.FromArgb(255, 128, 128); // #FF8080 - Red
public static readonly Color Statistics = Color.FromArgb(128, 128, 255); // #8080FF - Blue
public static readonly Color Oscillators = Color.FromArgb(255, 128, 255); // #FF80FF - Magenta
public static readonly Color Momentum = Color.FromArgb(128, 255, 255); // #80FFFF - Cyan
public static readonly Color Experiments = Color.FromArgb(255, 165, 0); // #FFA500 - Orange
[AttributeUsage(AttributeTargets.Property)]
public class DataSourceInputAttribute : InputParameterAttribute
{
public DataSourceInputAttribute(string label = "Data source", int sortIndex = 20)
: base(label, sortIndex, variants: new object[]
{
"Open", SourceType.Open,
"High", SourceType.High,
"Low", SourceType.Low,
"Close", SourceType.Close,
"HL/2 (Median)", SourceType.HL2,
"OC/2 (Midpoint)", SourceType.OC2,
"OHL/3 (Mean)", SourceType.OHL3,
"HLC/3 (Typical)", SourceType.HLC3,
"OHLC/4 (Average)", SourceType.OHLC4,
"HLCC/4 (Weighted)", SourceType.HLCC4
})
{ }
}
public static TValue GetInputValue(this Indicator indicator, UpdateArgs args, SourceType source)
{
var historicalData = indicator.HistoricalData;
TBar bar = new TBar(
time: historicalData.Time(),
open: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Open],
high: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.High],
low: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Low],
close: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Close],
volume: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Volume]
);
double price = source switch
{
SourceType.Open => bar.Open,
SourceType.High => bar.High,
SourceType.Low => bar.Low,
SourceType.Close => bar.Close,
SourceType.HL2 => bar.HL2,
SourceType.OC2 => bar.OC2,
SourceType.OHL3 => bar.OHL3,
SourceType.HLC3 => bar.HLC3,
SourceType.OHLC4 => bar.OHLC4,
SourceType.HLCC4 => bar.HLCC4,
_ => bar.Close
};
return new TValue(bar.Time, price);
}
public static TBar GetInputBar(this Indicator indicator, UpdateArgs args)
{
var historicalData = indicator.HistoricalData;
return new TBar(
time: historicalData.Time(),
open: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Open],
high: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.High],
low: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Low],
close: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Close],
volume: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Volume]
);
}
#pragma warning disable CA1416 // Validate platform compatibility
public static int GetHLineY(IChartWindowCoordinatesConverter converter, double value)
{
return (int)converter.GetChartY(value);
}
public static void PaintHLine(this Indicator indicator, PaintChartEventArgs args, double value, Pen pen)
{
if (indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
int leftX = clientRect.Left;
int rightX = clientRect.Right;
int Y = GetHLineY(converter, value);
using (pen)
{
gr.DrawLine(pen, new Point(leftX, Y), new Point(rightX, Y));
}
}
public static List<Point> GetSmoothCurvePoints(Indicator indicator, IChartWindowCoordinatesConverter converter, Rectangle clientRect, LineSeries series)
{
ArgumentNullException.ThrowIfNull(indicator);
ArgumentNullException.ThrowIfNull(converter);
var data = indicator.HistoricalData;
if (data == null) return new List<Point>();
var lastTime = data.Time(data.Count - 1);
var firstTime = data.Time(0);
IChartWindowCoordinatesConverter safeConverter = converter!;
DateTime tLeft = safeConverter.GetTime(clientRect.Left);
DateTime leftTime = tLeft > lastTime ? tLeft : lastTime;
DateTime tRight = safeConverter.GetTime(clientRect.Right);
DateTime rightTime = tRight < firstTime ? tRight : firstTime;
int leftIndex = (int)data.GetIndexByTime(leftTime.Ticks) + 1;
int rightIndex = (int)data.GetIndexByTime(rightTime.Ticks);
List<Point> allPoints = new List<Point>();
for (int i = rightIndex; i < leftIndex; i++)
{
int barX = (int)converter.GetChartX(data.Time(i));
int barY = (int)converter.GetChartY(series[i]);
int halfBarWidth = indicator.CurrentChart.BarsWidth / 2;
Point point = new Point(barX + halfBarWidth, barY);
allPoints.Add(point);
}
return allPoints;
}
public static void PaintSmoothCurve(this Indicator indicator, PaintChartEventArgs args, LineSeries series, int warmupPeriod, bool showColdValues = true, double tension = 0.2)
{
if (!series.Visible || indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
gr.SmoothingMode = SmoothingMode.AntiAlias;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
List<Point> allPoints = GetSmoothCurvePoints(indicator, converter, clientRect, series);
if (allPoints.Count > 1)
{
DateTime rightTime = new[] { converter.GetTime(clientRect.Right), indicator.HistoricalData.Time(0) }.Min();
int rightIndex = (int)indicator.HistoricalData.GetIndexByTime(rightTime.Ticks);
using Pen defaultPen = new(series.Color, series.Width) { DashStyle = ConvertLineStyleToDashStyle(series.Style) };
using Pen coldPen = new(series.Color, series.Width) { DashStyle = DashStyle.Dot };
int hotCount = (warmupPeriod >= 0) ? (indicator.Count - warmupPeriod - rightIndex) : 0;
// Draw the hot part
if (hotCount > 0)
{
var hotPoints = allPoints.Take(Math.Min(hotCount + 1, allPoints.Count)).ToArray();
gr.DrawCurve(defaultPen, hotPoints, 0, hotPoints.Length - 1, (float)tension);
}
// Draw the cold part
if (showColdValues && hotCount < allPoints.Count)
{
var coldPoints = allPoints.Skip(Math.Max(0, hotCount)).ToArray();
gr.DrawCurve(coldPen, coldPoints, 0, coldPoints.Length - 1, (float)tension);
}
}
}
public static List<(Rectangle Rect, Color Color)> GetHistogramRectangles(Indicator indicator, IChartWindowCoordinatesConverter converter, Rectangle clientRect, LineSeries series)
{
ArgumentNullException.ThrowIfNull(indicator);
ArgumentNullException.ThrowIfNull(converter);
var data = indicator.HistoricalData;
if (data == null) return new List<(Rectangle, Color)>();
var lastTime = data.Time(data.Count - 1);
var firstTime = data.Time(0);
IChartWindowCoordinatesConverter safeConverter = converter!;
DateTime tLeft = safeConverter.GetTime(clientRect.Left);
DateTime leftTime = tLeft > lastTime ? tLeft : lastTime;
DateTime tRight = safeConverter.GetTime(clientRect.Right);
DateTime rightTime = tRight < firstTime ? tRight : firstTime;
int leftIndex = (int)data.GetIndexByTime(leftTime.Ticks) + 1;
int rightIndex = (int)data.GetIndexByTime(rightTime.Ticks);
var result = new List<(Rectangle, Color)>();
for (int i = rightIndex; i < leftIndex; i++)
{
int barX = (int)converter.GetChartX(data.Time(i));
int barY = (int)converter.GetChartY(series[i]);
int barY0 = (int)converter.GetChartY(0);
int HistBarWidth = indicator.CurrentChart.BarsWidth - 2;
if (series[i] > 0)
{
result.Add((new Rectangle(barX, barY, HistBarWidth, Math.Abs(barY - barY0)), Color.FromArgb(150, 0, 255, 0)));
}
else
{
result.Add((new Rectangle(barX, barY0, HistBarWidth, Math.Abs(barY0 - barY)), Color.FromArgb(150, 255, 0, 0)));
}
}
return result;
}
public static void PaintHistogram(this Indicator indicator, PaintChartEventArgs args, LineSeries series, int warmupPeriod, bool showColdValues = true)
{
if (!series.Visible || indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
gr.SmoothingMode = SmoothingMode.AntiAlias;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
var rects = GetHistogramRectangles(indicator, converter, clientRect, series);
foreach (var (rect, color) in rects)
{
using (Brush hist = new SolidBrush(color))
{
gr.FillRectangle(hist, rect);
}
}
}
public static void DrawText(this Indicator indicator, PaintChartEventArgs args, string text)
{
if (indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
var clientRect = indicator.CurrentChart.MainWindow.ClientRectangle;
Font font = new Font("Inter", 8);
SizeF textSize = gr.MeasureString(text, font);
RectangleF textRect = new RectangleF(clientRect.Left + 5,
clientRect.Bottom - textSize.Height - 10,
textSize.Width + 10, textSize.Height + 10);
gr.FillRectangle(Brushes.DarkBlue, textRect);
gr.DrawString(text, font, Brushes.White, new PointF(textRect.X + 6, textRect.Y + 5));
}
private static DashStyle ConvertLineStyleToDashStyle(LineStyle lineStyle)
{
return lineStyle switch
{
LineStyle.Solid => DashStyle.Solid,
LineStyle.Dash => DashStyle.Dash,
LineStyle.Dot => DashStyle.Dot,
LineStyle.DashDot => DashStyle.DashDot,
_ => DashStyle.Solid,
};
}
}
using TradingPlatform.BusinessLayer;
using TradingPlatform.BusinessLayer.Chart;
using System.Drawing;
using System.Drawing.Drawing2D;
#nullable disable
namespace QuanTAlib;
public enum SourceType
{
Open, High, Low, Close, HL2, OC2, OHL3, HLC3, OHLC4, HLCC4
}
public enum MaType
{
Alma, Dema, Dsma, Dwma, Ema, Epma, Frama, Fwma, Gma, Hma, Hwma, Jma, Kama, Maaf, Mgdi, MMa, Pwma, Rema, Rma, Sinema, Sma, Smma, T3, Tema, Trima, Vidya, Wma, Zlema
}
public static class IndicatorExtensions
{
public static readonly Color Averages = Color.FromArgb(255, 255, 128); // #FFFF80 - Yellow
public static readonly Color Volume = Color.FromArgb(128, 255, 128); // #80FF80 - Green
public static readonly Color Volatility = Color.FromArgb(255, 128, 128); // #FF8080 - Red
public static readonly Color Statistics = Color.FromArgb(128, 128, 255); // #8080FF - Blue
public static readonly Color Oscillators = Color.FromArgb(255, 128, 255); // #FF80FF - Magenta
public static readonly Color Momentum = Color.FromArgb(128, 255, 255); // #80FFFF - Cyan
public static readonly Color Experiments = Color.FromArgb(255, 165, 0); // #FFA500 - Orange
[AttributeUsage(AttributeTargets.Property)]
public class DataSourceInputAttribute : InputParameterAttribute
{
public DataSourceInputAttribute(string label = "Data source", int sortIndex = 20)
: base(label, sortIndex, variants: new object[]
{
"Open", SourceType.Open,
"High", SourceType.High,
"Low", SourceType.Low,
"Close", SourceType.Close,
"HL/2 (Median)", SourceType.HL2,
"OC/2 (Midpoint)", SourceType.OC2,
"OHL/3 (Mean)", SourceType.OHL3,
"HLC/3 (Typical)", SourceType.HLC3,
"OHLC/4 (Average)", SourceType.OHLC4,
"HLCC/4 (Weighted)", SourceType.HLCC4
})
{ }
}
public static TValue GetInputValue(this Indicator indicator, UpdateArgs args, SourceType source)
{
var historicalData = indicator.HistoricalData;
var item = historicalData[indicator.Count - 1, SeekOriginHistory.Begin];
double price = item.GetPrice(source);
return new TValue(item.TimeLeft.Ticks, price);
}
public static TBar GetInputBar(this Indicator indicator, UpdateArgs args)
{
var historicalData = indicator.HistoricalData;
return new TBar(
time: historicalData.Time(),
open: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Open],
high: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.High],
low: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Low],
close: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Close],
volume: historicalData[indicator.Count - 1, SeekOriginHistory.Begin][PriceType.Volume]
);
}
public static double GetPrice(this IHistoryItem item, SourceType source)
{
return source switch
{
SourceType.Open => item[PriceType.Open],
SourceType.High => item[PriceType.High],
SourceType.Low => item[PriceType.Low],
SourceType.Close => item[PriceType.Close],
SourceType.HL2 => (item[PriceType.High] + item[PriceType.Low]) * 0.5,
SourceType.OC2 => (item[PriceType.Open] + item[PriceType.Close]) * 0.5,
SourceType.OHL3 => (item[PriceType.Open] + item[PriceType.High] + item[PriceType.Low]) * 0.333333333333333333,
SourceType.HLC3 => (item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close]) * 0.333333333333333333,
SourceType.OHLC4 => (item[PriceType.Open] + item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close]) * 0.25,
SourceType.HLCC4 => (item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close] + item[PriceType.Close]) * 0.25,
_ => item[PriceType.Close]
};
}
public static void FillValues(this HistoricalData history, Span<double> destination, SourceType source)
{
int count = Math.Min(history.Count, destination.Length);
// Hoist switch to avoid per-iteration branching
switch (source)
{
case SourceType.Open:
for (int i = 0; i < count; i++) destination[i] = history[i, SeekOriginHistory.Begin][PriceType.Open];
break;
case SourceType.High:
for (int i = 0; i < count; i++) destination[i] = history[i, SeekOriginHistory.Begin][PriceType.High];
break;
case SourceType.Low:
for (int i = 0; i < count; i++) destination[i] = history[i, SeekOriginHistory.Begin][PriceType.Low];
break;
case SourceType.Close:
for (int i = 0; i < count; i++) destination[i] = history[i, SeekOriginHistory.Begin][PriceType.Close];
break;
case SourceType.HL2:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.High] + item[PriceType.Low]) * 0.5;
}
break;
case SourceType.OC2:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.Open] + item[PriceType.Close]) * 0.5;
}
break;
case SourceType.OHL3:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.Open] + item[PriceType.High] + item[PriceType.Low]) * 0.333333333333333333;
}
break;
case SourceType.HLC3:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close]) * 0.333333333333333333;
}
break;
case SourceType.OHLC4:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.Open] + item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close]) * 0.25;
}
break;
case SourceType.HLCC4:
for (int i = 0; i < count; i++)
{
var item = history[i, SeekOriginHistory.Begin];
destination[i] = (item[PriceType.High] + item[PriceType.Low] + item[PriceType.Close] + item[PriceType.Close]) * 0.25;
}
break;
default:
for (int i = 0; i < count; i++) destination[i] = history[i, SeekOriginHistory.Begin][PriceType.Close];
break;
}
}
public static void SetValues(this LineSeries series, ReadOnlySpan<double> values)
{
int count = values.Length;
for (int i = 0; i < count; i++)
{
series.SetValue(values[i], i, SeekOriginHistory.Begin);
}
}
#pragma warning disable CA1416 // Validate platform compatibility
public static int GetHLineY(IChartWindowCoordinatesConverter converter, double value)
{
return (int)converter.GetChartY(value);
}
public static void PaintHLine(this Indicator indicator, PaintChartEventArgs args, double value, Pen pen)
{
if (indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
int leftX = clientRect.Left;
int rightX = clientRect.Right;
int Y = GetHLineY(converter, value);
using (pen)
{
gr.DrawLine(pen, new Point(leftX, Y), new Point(rightX, Y));
}
}
public static Point[] GetSmoothCurvePoints(Indicator indicator, IChartWindowCoordinatesConverter converter, Rectangle clientRect, LineSeries series)
{
ArgumentNullException.ThrowIfNull(indicator);
ArgumentNullException.ThrowIfNull(converter);
var data = indicator.HistoricalData;
if (data == null) return Array.Empty<Point>();
var lastTime = data.Time(data.Count - 1);
var firstTime = data.Time(0);
IChartWindowCoordinatesConverter safeConverter = converter!;
DateTime tLeft = safeConverter.GetTime(clientRect.Left);
DateTime leftTime = tLeft > lastTime ? tLeft : lastTime;
DateTime tRight = safeConverter.GetTime(clientRect.Right);
DateTime rightTime = tRight < firstTime ? tRight : firstTime;
int leftIndex = (int)data.GetIndexByTime(leftTime.Ticks) + 1;
int rightIndex = (int)data.GetIndexByTime(rightTime.Ticks);
int count = leftIndex - rightIndex;
if (count <= 0) return Array.Empty<Point>();
Point[] allPoints = new Point[count];
for (int i = 0; i < count; i++)
{
int dataIndex = rightIndex + i;
int barX = (int)converter.GetChartX(data.Time(dataIndex));
int barY = (int)converter.GetChartY(series[dataIndex]);
int halfBarWidth = indicator.CurrentChart.BarsWidth / 2;
allPoints[i] = new Point(barX + halfBarWidth, barY);
}
return allPoints;
}
public static void PaintSmoothCurve(this Indicator indicator, PaintChartEventArgs args, LineSeries series, int warmupPeriod, bool showColdValues = true, double tension = 0.2)
{
if (!series.Visible || indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
gr.SmoothingMode = SmoothingMode.AntiAlias;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
Point[] allPoints = GetSmoothCurvePoints(indicator, converter, clientRect, series);
if (allPoints.Length > 1)
{
DateTime tRight = converter.GetTime(clientRect.Right);
DateTime tZero = indicator.HistoricalData.Time(0);
DateTime rightTime = tRight < tZero ? tRight : tZero;
int rightIndex = (int)indicator.HistoricalData.GetIndexByTime(rightTime.Ticks);
using Pen defaultPen = new(series.Color, series.Width) { DashStyle = ConvertLineStyleToDashStyle(series.Style) };
using Pen coldPen = new(series.Color, series.Width) { DashStyle = DashStyle.Dot };
int hotCount = (warmupPeriod >= 0) ? (indicator.Count - warmupPeriod - rightIndex) : 0;
// Draw the hot part
int hotSegments = Math.Min(hotCount, allPoints.Length - 1);
if (hotSegments > 0)
{
gr.DrawCurve(defaultPen, allPoints, 0, hotSegments, (float)tension);
}
// Draw the cold part
if (showColdValues)
{
int coldStart = Math.Max(0, hotCount);
int coldSegments = (allPoints.Length - 1) - coldStart;
if (coldSegments > 0)
{
gr.DrawCurve(coldPen, allPoints, coldStart, coldSegments, (float)tension);
}
}
}
}
public static void PaintLine(this Indicator indicator, PaintChartEventArgs args, LineSeries series, int warmupPeriod, bool showColdValues = true)
{
if (!series.Visible || indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
gr.SmoothingMode = SmoothingMode.AntiAlias;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
var data = indicator.HistoricalData;
if (data == null) return;
var lastTime = data.Time(data.Count - 1);
var firstTime = data.Time(0);
IChartWindowCoordinatesConverter safeConverter = converter!;
DateTime tLeft = safeConverter.GetTime(clientRect.Left);
DateTime leftTime = tLeft > lastTime ? tLeft : lastTime;
DateTime tRight = safeConverter.GetTime(clientRect.Right);
DateTime rightTime = tRight < firstTime ? tRight : firstTime;
int leftIndex = (int)data.GetIndexByTime(leftTime.Ticks) + 1;
int rightIndex = (int)data.GetIndexByTime(rightTime.Ticks);
int count = leftIndex - rightIndex;
if (count <= 0) return;
// Use ArrayPool to avoid allocations
Point[] allPoints = System.Buffers.ArrayPool<Point>.Shared.Rent(count);
try
{
int halfBarWidth = indicator.CurrentChart.BarsWidth / 2;
for (int i = 0; i < count; i++)
{
int dataIndex = rightIndex + i;
int barX = (int)converter.GetChartX(data.Time(dataIndex));
int barY = (int)converter.GetChartY(series[dataIndex]);
allPoints[i] = new Point(barX + halfBarWidth, barY);
}
if (count > 1)
{
using Pen defaultPen = new(series.Color, series.Width) { DashStyle = ConvertLineStyleToDashStyle(series.Style) };
using Pen coldPen = new(series.Color, series.Width) { DashStyle = DashStyle.Dot };
int hotCount = (warmupPeriod >= 0) ? (indicator.Count - warmupPeriod - rightIndex) : 0;
// Draw the hot part
int hotSegments = Math.Min(hotCount, count - 1);
if (hotSegments > 0)
{
gr.DrawCurve(defaultPen, allPoints, 0, hotSegments, tension: 0);
}
// Draw the cold part
if (showColdValues)
{
int coldStart = Math.Max(0, hotCount);
int coldSegments = (count - 1) - coldStart;
if (coldSegments > 0)
{
gr.DrawCurve(coldPen, allPoints, coldStart, coldSegments, tension: 0);
}
}
}
}
finally
{
System.Buffers.ArrayPool<Point>.Shared.Return(allPoints);
}
}
public static List<(Rectangle Rect, Color Color)> GetHistogramRectangles(Indicator indicator, IChartWindowCoordinatesConverter converter, Rectangle clientRect, LineSeries series)
{
ArgumentNullException.ThrowIfNull(indicator);
ArgumentNullException.ThrowIfNull(converter);
var data = indicator.HistoricalData;
if (data == null) return new List<(Rectangle, Color)>();
var lastTime = data.Time(data.Count - 1);
var firstTime = data.Time(0);
IChartWindowCoordinatesConverter safeConverter = converter!;
DateTime tLeft = safeConverter.GetTime(clientRect.Left);
DateTime leftTime = tLeft > lastTime ? tLeft : lastTime;
DateTime tRight = safeConverter.GetTime(clientRect.Right);
DateTime rightTime = tRight < firstTime ? tRight : firstTime;
int leftIndex = (int)data.GetIndexByTime(leftTime.Ticks) + 1;
int rightIndex = (int)data.GetIndexByTime(rightTime.Ticks);
var result = new List<(Rectangle, Color)>();
for (int i = rightIndex; i < leftIndex; i++)
{
int barX = (int)converter.GetChartX(data.Time(i));
int barY = (int)converter.GetChartY(series[i]);
int barY0 = (int)converter.GetChartY(0);
int HistBarWidth = indicator.CurrentChart.BarsWidth - 2;
if (series[i] > 0)
{
result.Add((new Rectangle(barX, barY, HistBarWidth, Math.Abs(barY - barY0)), Color.FromArgb(150, 0, 255, 0)));
}
else
{
result.Add((new Rectangle(barX, barY0, HistBarWidth, Math.Abs(barY0 - barY)), Color.FromArgb(150, 255, 0, 0)));
}
}
return result;
}
public static void PaintHistogram(this Indicator indicator, PaintChartEventArgs args, LineSeries series, int warmupPeriod, bool showColdValues = true)
{
if (!series.Visible || indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
gr.SmoothingMode = SmoothingMode.AntiAlias;
var mainWindow = indicator.CurrentChart.Windows[args.WindowIndex];
var converter = mainWindow.CoordinatesConverter;
var clientRect = mainWindow.ClientRectangle;
gr.SetClip(clientRect);
var rects = GetHistogramRectangles(indicator, converter, clientRect, series);
foreach (var (rect, color) in rects)
{
using Brush hist = new SolidBrush(color);
gr.FillRectangle(hist, rect);
}
}
public static void DrawText(this Indicator indicator, PaintChartEventArgs args, string text)
{
if (indicator.CurrentChart == null)
return;
Graphics gr = args.Graphics;
var clientRect = indicator.CurrentChart.MainWindow.ClientRectangle;
var font = new Font("Inter", 8);
SizeF textSize = gr.MeasureString(text, font);
var textRect = new RectangleF(clientRect.Left + 5,
clientRect.Bottom - textSize.Height - 10,
textSize.Width + 10, textSize.Height + 10);
gr.FillRectangle(Brushes.DarkBlue, textRect);
gr.DrawString(text, font, Brushes.White, new PointF(textRect.X + 6, textRect.Y + 5));
}
private static DashStyle ConvertLineStyleToDashStyle(LineStyle lineStyle)
{
return lineStyle switch
{
LineStyle.Solid => DashStyle.Solid,
LineStyle.Dash => DashStyle.Dash,
LineStyle.Dot => DashStyle.Dot,
LineStyle.DashDot => DashStyle.DashDot,
_ => DashStyle.Solid,
};
}
}