antilles79 from the Discord (#1966) noted that candlestick plots have two issues:
List<OHLC> price = new List<OHLC>();
price.Add(new OHLC(100, 103, 99, 102, new DateTime(1899, 12, 30), TimeSpan.FromDays(1)));
price.Add(new OHLC(100, 103, 99, 102, new DateTime(1899, 12, 31), TimeSpan.FromDays(1)));
price.Add(new OHLC(101, 103, 99, 101, new DateTime(1900, 1, 1), TimeSpan.FromDays(1)));
price.Add(new OHLC(100, 103, 99, 102, new DateTime(1900, 1, 2), TimeSpan.FromDays(1)));
price.Add(new OHLC(100, 103, 99, 102, new DateTime(1900, 1, 3), TimeSpan.FromDays(1)));
formsPlot1.Plot.Add.Candlestick(price);
These issues can probably be resolved by editing this section of code:
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for (int i = 0; i < ohlcs.Count; i++) |
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{ |
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OHLC ohlc = ohlcs[i]; |
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bool isRising = ohlc.Close >= ohlc.Open; |
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LineStyle lineStyle = isRising ? RisingLineStyle : FallingLineStyle; |
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FillStyle fillStlye = isRising ? RisingFillStyle : FallingFillStyle; |
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float top = Axes.GetPixelY(ohlc.High); |
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float bottom = Axes.GetPixelY(ohlc.Low); |
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float center, left, right; |
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if (Sequential == false) |
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{ |
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center = Axes.GetPixelX(ohlc.DateTime.ToNumber()); |
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TimeSpan halfWidth = new((long)(ohlc.TimeSpan.Ticks * SymbolWidth / 2)); |
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DateTime leftTime = ohlc.DateTime - halfWidth; |
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DateTime rightTime = ohlc.DateTime + halfWidth; |
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left = Axes.GetPixelX(leftTime.ToNumber()); |
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right = Axes.GetPixelX(rightTime.ToNumber()); |
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} |
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else |
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{ |
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center = Axes.GetPixelX(i); |
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left = Axes.GetPixelX(i - (float)SymbolWidth / 2); |
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right = Axes.GetPixelX(i + (float)SymbolWidth / 2); |
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} |
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// do not render OHLCs off the screen |
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if (right < rp.DataRect.Left || left > rp.DataRect.Right) |
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continue; |
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float open = Axes.GetPixelY(ohlc.Open); |
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float close = Axes.GetPixelY(ohlc.Close); |
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// center line |
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using SKPath path = new(); |
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path.MoveTo(center, top); |
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path.LineTo(center, bottom); |
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lineStyle.ApplyToPaint(paint); |
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rp.Canvas.DrawPath(path, paint); |
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// rectangle |
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SKRect rect = new(left, Math.Max(open, close), right, Math.Min(open, close)); |
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fillStlye.ApplyToPaint(paint, rect.ToPixelRect()); |
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rp.Canvas.DrawRect(rect, paint); |
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} |
