/// <summary>
/// Fast index of bar where max(bar[i].X) <= x
/// </summary>
/// <returns>The index of the bar closest to X, where max(bar[i].X) <= x.</returns>
/// <param name="x">The x coordinate.</param>
/// <param name="startingIndex">starting index</param>
public int FindByX(double x, int startingIndex = -1)
{
if (startingIndex < 0)
{
startingIndex = this.winIndex;
}
return(OhlcvItem.FindIndex(this.data, x, startingIndex));
}
/// <summary>
/// Gets the point on the series that is nearest the specified point.
/// </summary>
/// <param name="point">The point.</param>
/// <param name="interpolate">Interpolate the series if this flag is set to <c>true</c>.</param>
/// <returns>A TrackerHitResult for the current hit.</returns>
public override TrackerHitResult GetNearestPoint(ScreenPoint point, bool interpolate)
{
if (this.XAxis == null || this.YAxis == null || interpolate || this.data.Count == 0)
{
return(null);
}
var nbars = this.data.Count;
var xy = this.InverseTransform(point);
var targetX = xy.X;
// punt if beyond start & end of series
if (targetX > (this.data[nbars - 1].X + this.minDx))
{
return(null);
}
else if (targetX < (this.data[0].X - this.minDx))
{
return(null);
}
var pidx = OhlcvItem.FindIndex(this.data, targetX, this.winIndex);
var nidx = ((pidx + 1) < this.data.Count) ? pidx + 1 : pidx;
Func <OhlcvItem, double> distance = bar =>
{
var dx = bar.X - xy.X;
return(dx * dx);
};
// determine closest point
var midx = distance(this.data[pidx]) <= distance(this.data[nidx]) ? pidx : nidx;
var mbar = this.data[midx];
var hit = new DataPoint(mbar.X, mbar.Close);
return(new TrackerHitResult
{
Series = this,
DataPoint = hit,
Position = this.Transform(hit),
Item = mbar,
Index = midx,
Text = StringHelper.Format(
this.ActualCulture,
this.TrackerFormatString,
mbar,
this.XAxis.GetValue(mbar.X),
this.YAxis.GetValue(mbar.High),
this.YAxis.GetValue(mbar.Low),
this.YAxis.GetValue(mbar.Open),
this.YAxis.GetValue(mbar.Close),
this.YAxis.GetValue(mbar.BuyVolume),
this.YAxis.GetValue(mbar.SellVolume))
});
}
/// <summary>
/// Append a bar to the series (must be in X order)
/// </summary>
/// <param name="bar">The Bar.</param>
public void Append(OhlcvItem bar)
{
if (this.data == null)
{
this.data = new List <OhlcvItem>();
}
if (this.data.Count > 0 && this.data[this.data.Count - 1].X > bar.X)
{
throw new ArgumentException("cannot append bar out of order, must be sequential in X");
}
this.data.Add(bar);
}
/// <summary>
/// Append a bar to the series (must be in X order)
/// </summary>
/// <param name="bar">Bar object.</param>
public void Append(OhlcvItem bar)
{
if (this.data == null)
{
this.data = new List<OhlcvItem>();
}
if (this.data.Count > 0 && this.data[this.data.Count - 1].X > bar.X)
{
throw new ArgumentException("cannot append bar out of order, must be sequential in X");
}
this.data.Add(bar);
}
/// <summary>
/// Renders the series on the specified rendering context.
/// </summary>
/// <param name="rc">The rendering context.</param>
public override void Render(IRenderContext rc)
{
if (this.data == null || this.data.Count == 0)
{
return;
}
var items = this.data;
var nitems = this.data.Count;
this.VerifyAxes();
var clippingRect = this.GetClippingRect();
var datacandlewidth = (this.BarWidth > 0) ? this.BarWidth : this.minDx * 0.80;
var halfDataCandleWidth = datacandlewidth * 0.5;
// colors
var fillUp = this.GetSelectableFillColor(this.PositiveColor);
var fillDown = this.GetSelectableFillColor(this.NegativeColor);
var barfillUp = this.PositiveHollow ? OxyColors.Transparent : fillUp;
var barfillDown = this.NegativeHollow ? OxyColors.Transparent : fillDown;
var lineUp = this.GetSelectableColor(this.PositiveColor.ChangeIntensity(this.StrokeIntensity));
var lineDown = this.GetSelectableColor(this.NegativeColor.ChangeIntensity(this.StrokeIntensity));
// determine render range
var xmin = this.XAxis.ActualMinimum;
var xmax = this.XAxis.ActualMaximum;
this.winIndex = OhlcvItem.FindIndex(items, xmin, this.winIndex);
for (int i = this.winIndex; i < nitems; i++)
{
var bar = items[i];
// if item beyond visible range, done
if (bar.X > xmax)
{
break;
}
// check to see whether is valid
if (!bar.IsValid())
{
continue;
}
var p1 = this.Transform(bar.X - halfDataCandleWidth, 0);
switch (this.VolumeStyle)
{
case VolumeStyle.Combined:
{
var p2 = this.Transform(bar.X + halfDataCandleWidth, Math.Abs(bar.BuyVolume - bar.SellVolume));
var fillcolor = (bar.BuyVolume > bar.SellVolume) ? barfillUp : barfillDown;
var linecolor = (bar.BuyVolume > bar.SellVolume) ? lineUp : lineDown;
var rect1 = new OxyRect(p1, p2);
rc.DrawClippedRectangleAsPolygon(clippingRect, rect1, fillcolor, linecolor, this.StrokeThickness);
}
break;
case VolumeStyle.PositiveNegative:
{
var p2Buy = this.Transform(bar.X + halfDataCandleWidth, bar.BuyVolume);
var p2Bell = this.Transform(bar.X + halfDataCandleWidth, -bar.SellVolume);
var rectBuy = new OxyRect(p1, p2Buy);
var rectSell = new OxyRect(p1, p2Bell);
rc.DrawClippedRectangleAsPolygon(clippingRect, rectBuy, fillUp, lineUp, this.StrokeThickness);
rc.DrawClippedRectangleAsPolygon(clippingRect, rectSell, fillDown, lineDown, this.StrokeThickness);
}
break;
case VolumeStyle.Stacked:
{
var p2Buy = this.Transform(bar.X + halfDataCandleWidth, bar.BuyVolume);
var p2Sell = this.Transform(bar.X + halfDataCandleWidth, bar.SellVolume);
var pBoth = this.Transform(bar.X - halfDataCandleWidth, bar.BuyVolume + bar.SellVolume);
OxyRect rectBuy;
OxyRect rectSell;
if (bar.BuyVolume > bar.SellVolume)
{
rectSell = new OxyRect(p1, p2Sell);
rectBuy = new OxyRect(p2Sell, pBoth);
}
else
{
rectBuy = new OxyRect(p1, p2Buy);
rectSell = new OxyRect(p2Buy, pBoth);
}
rc.DrawClippedRectangleAsPolygon(clippingRect, rectBuy, fillUp, lineUp, this.StrokeThickness);
rc.DrawClippedRectangleAsPolygon(clippingRect, rectSell, fillDown, lineDown, this.StrokeThickness);
break;
}
case VolumeStyle.None:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (this.InterceptStrokeThickness > 0 && this.InterceptLineStyle != LineStyle.None)
{
// draw volume y=0 line
var p1 = this.InverseTransform(clippingRect.BottomLeft);
var p2 = this.InverseTransform(clippingRect.TopRight);
var lineA = this.Transform(p1.X, 0);
var lineB = this.Transform(p2.X, 0);
rc.DrawClippedLine(
clippingRect,
new[] { lineA, lineB },
0,
this.InterceptColor,
this.InterceptStrokeThickness,
this.InterceptLineStyle.GetDashArray(),
LineJoin.Miter,
true);
}
}
/// <summary>
/// Renders the series on the specified rendering context.
/// </summary>
/// <param name="rc">The rendering context.</param>
// ReSharper disable once FunctionComplexityOverflow
public override void Render(IRenderContext rc)
{
if (this.data == null || this.data.Count == 0)
{
return;
}
var items = this.data;
var nitems = this.data.Count;
this.VerifyAxes();
var clippingBar = this.GetClippingRect(this.BarAxis);
var clippingSep = this.GetSeparationClippingRect();
var clippingVol = this.GetClippingRect(this.VolumeAxis);
var datacandlewidth = (this.CandleWidth > 0) ? this.CandleWidth : this.minDx * 0.80;
var candlewidth =
this.XAxis.Transform(items[0].X + datacandlewidth) -
this.XAxis.Transform(items[0].X) - this.StrokeThickness;
// colors
var fillUp = this.GetSelectableFillColor(this.PositiveColor);
var fillDown = this.GetSelectableFillColor(this.NegativeColor);
var barfillUp = this.PositiveHollow ? OxyColors.Transparent : fillUp;
var barfillDown = this.NegativeHollow ? OxyColors.Transparent : fillDown;
var lineUp = this.GetSelectableColor(this.PositiveColor.ChangeIntensity(this.StrokeIntensity));
var lineDown = this.GetSelectableColor(this.NegativeColor.ChangeIntensity(this.StrokeIntensity));
// determine render range
var xmin = this.XAxis.ActualMinimum;
var xmax = this.XAxis.ActualMaximum;
this.winIndex = OhlcvItem.FindIndex(items, xmin, this.winIndex);
for (int i = this.winIndex; i < nitems; i++)
{
var bar = items[i];
// if item beyond visible range, done
if (bar.X > xmax)
{
break;
}
// check to see whether is valid
if (!bar.IsValid())
{
continue;
}
var fillColor = bar.Close > bar.Open ? barfillUp : barfillDown;
var lineColor = bar.Close > bar.Open ? lineUp : lineDown;
var high = this.Transform(bar.X, bar.High);
var low = this.Transform(bar.X, bar.Low);
var open = this.Transform(bar.X, bar.Open);
var close = this.Transform(bar.X, bar.Close);
var max = new ScreenPoint(open.X, Math.Max(open.Y, close.Y));
var min = new ScreenPoint(open.X, Math.Min(open.Y, close.Y));
// Bar part
rc.DrawClippedLine(
clippingBar,
new[] { high, min },
0,
lineColor,
this.StrokeThickness,
null,
LineJoin.Miter,
true);
// Lower extent
rc.DrawClippedLine(
clippingBar,
new[] { max, low },
0,
lineColor,
this.StrokeThickness,
null,
LineJoin.Miter,
true);
// Body
var openLeft = open + new ScreenVector(-candlewidth * 0.5, 0);
var rect = new OxyRect(openLeft.X, min.Y, candlewidth, max.Y - min.Y);
rc.DrawClippedRectangleAsPolygon(
clippingBar,
rect,
fillColor,
lineColor,
this.StrokeThickness);
// Volume Part
if (this.VolumeAxis == null || this.VolumeStyle == VolumeStyle.None)
{
continue;
}
var iY0 = this.VolumeAxis.Transform(0);
switch (this.VolumeStyle)
{
case VolumeStyle.Combined:
{
var adj = this.VolumeAxis.Transform(Math.Abs(bar.BuyVolume - bar.SellVolume));
var fillcolor = (bar.BuyVolume > bar.SellVolume) ? barfillUp : barfillDown;
var linecolor = (bar.BuyVolume > bar.SellVolume) ? lineUp : lineDown;
var rect1 = new OxyRect(openLeft.X, adj, candlewidth, Math.Abs(adj - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect1, fillcolor, linecolor, this.StrokeThickness);
}
break;
case VolumeStyle.PositiveNegative:
{
var buyY = this.VolumeAxis.Transform(bar.BuyVolume);
var sellY = this.VolumeAxis.Transform(-bar.SellVolume);
var rect1 = new OxyRect(openLeft.X, buyY, candlewidth, Math.Abs(buyY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect1, fillUp, lineUp, this.StrokeThickness);
var rect2 = new OxyRect(openLeft.X, iY0, candlewidth, Math.Abs(sellY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect2, fillDown, lineDown, this.StrokeThickness);
}
break;
case VolumeStyle.Stacked:
if (bar.BuyVolume > bar.SellVolume)
{
var buyY = this.VolumeAxis.Transform(bar.BuyVolume);
var sellY = this.VolumeAxis.Transform(bar.SellVolume);
var dyoffset = sellY - iY0;
var rect2 = new OxyRect(openLeft.X, sellY, candlewidth, Math.Abs(sellY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect2, fillDown, lineDown, this.StrokeThickness);
var rect1 = new OxyRect(openLeft.X, buyY + dyoffset, candlewidth, Math.Abs(buyY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect1, fillUp, lineUp, this.StrokeThickness);
}
else
{
var buyY = this.VolumeAxis.Transform(bar.BuyVolume);
var sellY = this.VolumeAxis.Transform(bar.SellVolume);
var dyoffset = buyY - iY0;
var rect1 = new OxyRect(openLeft.X, buyY, candlewidth, Math.Abs(buyY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect1, fillUp, lineUp, this.StrokeThickness);
var rect2 = new OxyRect(openLeft.X, sellY + dyoffset, candlewidth, Math.Abs(sellY - iY0));
rc.DrawClippedRectangleAsPolygon(clippingVol, rect2, fillDown, lineDown, this.StrokeThickness);
}
break;
}
}
// draw volume & bar separation line
if (this.VolumeStyle != VolumeStyle.None)
{
var ysep = (clippingSep.Bottom + clippingSep.Top) / 2.0;
rc.DrawClippedLine(
clippingSep,
new[] { new ScreenPoint(clippingSep.Left, ysep), new ScreenPoint(clippingSep.Right, ysep) },
0,
this.SeparatorColor,
this.SeparatorStrokeThickness,
this.SeparatorLineStyle.GetDashArray(),
LineJoin.Miter,
true);
}
// draw volume y=0 line
if (this.VolumeAxis != null && this.VolumeStyle == VolumeStyle.PositiveNegative)
{
var y0 = this.VolumeAxis.Transform(0);
rc.DrawClippedLine(
clippingVol,
new[] { new ScreenPoint(clippingVol.Left, y0), new ScreenPoint(clippingVol.Right, y0) },
0,
OxyColors.Goldenrod,
this.SeparatorStrokeThickness,
this.SeparatorLineStyle.GetDashArray(),
LineJoin.Miter,
true);
}
}
/// <summary>
/// Renders the series on the specified rendering context.
/// </summary>
/// <param name="rc">The rendering context.</param>
public override void Render(IRenderContext rc)
{
if (this.data == null || this.data.Count == 0)
{
return;
}
var items = this.data;
var nitems = this.data.Count;
this.VerifyAxes();
var clipping = this.GetClippingRect();
var datacandlewidth = (this.BarWidth > 0) ? this.BarWidth : this.minDx * 0.80;
var candlewidth =
this.XAxis.Transform(items[0].X + datacandlewidth) -
this.XAxis.Transform(items[0].X) - this.StrokeThickness;
// colors
var fillUp = this.GetSelectableFillColor(this.PositiveColor);
var fillDown = this.GetSelectableFillColor(this.NegativeColor);
var barfillUp = this.PositiveHollow ? OxyColors.Transparent : fillUp;
var barfillDown = this.NegativeHollow ? OxyColors.Transparent : fillDown;
var lineUp = this.GetSelectableColor(this.PositiveColor.ChangeIntensity(this.StrokeIntensity));
var lineDown = this.GetSelectableColor(this.NegativeColor.ChangeIntensity(this.StrokeIntensity));
// determine render range
var xmin = this.XAxis.ActualMinimum;
var xmax = this.XAxis.ActualMaximum;
this.winIndex = OhlcvItem.FindIndex(items, xmin, this.winIndex);
for (int i = this.winIndex; i < nitems; i++)
{
var bar = items[i];
// if item beyond visible range, done
if (bar.X > xmax)
{
break;
}
// check to see whether is valid
if (!bar.IsValid())
{
continue;
}
var leftX = this.XAxis.Transform(bar.X) - (this.BarWidth / 2.0);
var y0 = this.YAxis.Transform(0);
switch (this.VolumeStyle)
{
case VolumeStyle.Combined:
{
var adj = this.YAxis.Transform(Math.Abs(bar.BuyVolume - bar.SellVolume));
var fillcolor = (bar.BuyVolume > bar.SellVolume) ? barfillUp : barfillDown;
var linecolor = (bar.BuyVolume > bar.SellVolume) ? lineUp : lineDown;
var rect1 = new OxyRect(leftX, adj, candlewidth, Math.Abs(adj - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect1, fillcolor, linecolor, this.StrokeThickness);
}
break;
case VolumeStyle.PositiveNegative:
{
var buyY = this.YAxis.Transform(bar.BuyVolume);
var sellY = this.YAxis.Transform(-bar.SellVolume);
var rect1 = new OxyRect(leftX, buyY, candlewidth, Math.Abs(buyY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect1, fillUp, lineUp, this.StrokeThickness);
var rect2 = new OxyRect(leftX, y0, candlewidth, Math.Abs(sellY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect2, fillDown, lineDown, this.StrokeThickness);
}
break;
case VolumeStyle.Stacked:
if (bar.BuyVolume > bar.SellVolume)
{
var buyY = this.YAxis.Transform(bar.BuyVolume);
var sellY = this.YAxis.Transform(bar.SellVolume);
var dyoffset = sellY - y0;
var rect2 = new OxyRect(leftX, sellY, candlewidth, Math.Abs(sellY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect2, fillDown, lineDown, this.StrokeThickness);
var rect1 = new OxyRect(leftX, buyY + dyoffset, candlewidth, Math.Abs(buyY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect1, fillUp, lineUp, this.StrokeThickness);
}
else
{
var buyY = this.YAxis.Transform(bar.BuyVolume);
var sellY = this.YAxis.Transform(bar.SellVolume);
var dyoffset = buyY - y0;
var rect1 = new OxyRect(leftX, buyY, candlewidth, Math.Abs(buyY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect1, fillUp, lineUp, this.StrokeThickness);
var rect2 = new OxyRect(leftX, sellY + dyoffset, candlewidth, Math.Abs(sellY - y0));
rc.DrawClippedRectangleAsPolygon(clipping, rect2, fillDown, lineDown, this.StrokeThickness);
}
break;
}
}
// draw volume y=0 line
var intercept = this.YAxis.Transform(0);
rc.DrawClippedLine(
clipping,
new[] { new ScreenPoint(clipping.Left, intercept), new ScreenPoint(clipping.Right, intercept) },
0,
this.InterceptColor,
this.InterceptStrokeThickness,
this.InterceptLineStyle.GetDashArray(),
LineJoin.Miter,
true);
}
