/// <summary>
/// Creates the candle stick and volume series example.
/// </summary>
/// <returns>The candle stick and volume series example.</returns>
/// <param name="title">Title.</param>
/// <param name="style">Style.</param>
/// <param name="n">N.</param>
/// <param name="naturalY">If set to <c>true</c> natural y.</param>
/// <param name="naturalV">If set to <c>true</c> natural v.</param>
private static Example CreateCandleStickAndVolumeSeriesExample(
string title,
VolumeStyle style,
int n = 10000,
bool naturalY = false,
bool naturalV = false)
{
var pm = new PlotModel { Title = title };
var series = new CandleStickAndVolumeSeries
{
PositiveColor = OxyColors.DarkGreen,
NegativeColor = OxyColors.Red,
PositiveHollow = false,
NegativeHollow = false,
SeparatorColor = OxyColors.Gray,
SeparatorLineStyle = LineStyle.Dash,
VolumeStyle = style
};
// create bars
foreach (var bar in OhlcvItemGenerator.MRProcess(n))
{
series.Append(bar);
}
// create visible window
var Istart = n - 200;
var Iend = n - 120;
var Ymin = series.Items.Skip(Istart).Take(Iend - Istart + 1).Select(x => x.Low).Min();
var Ymax = series.Items.Skip(Istart).Take(Iend - Istart + 1).Select(x => x.High).Max();
var Xmin = series.Items[Istart].X;
var Xmax = series.Items[Iend].X;
// setup axes
var timeAxis = new DateTimeAxis
{
Position = AxisPosition.Bottom,
Minimum = Xmin,
Maximum = Xmax
};
var barAxis = new LinearAxis
{
Position = AxisPosition.Left,
Key = series.BarAxisKey,
StartPosition = 0.25,
EndPosition = 1.0,
Minimum = naturalY ? double.NaN : Ymin,
Maximum = naturalY ? double.NaN : Ymax
};
var volAxis = new LinearAxis
{
Position = AxisPosition.Left,
Key = series.VolumeAxisKey,
StartPosition = 0.0,
EndPosition = 0.22,
Minimum = naturalV ? double.NaN : 0,
Maximum = naturalV ? double.NaN : 5000
};
switch (style)
{
case VolumeStyle.None:
barAxis.Key = null;
barAxis.StartPosition = 0.0;
pm.Axes.Add(timeAxis);
pm.Axes.Add(barAxis);
break;
case VolumeStyle.Combined:
case VolumeStyle.Stacked:
pm.Axes.Add(timeAxis);
pm.Axes.Add(barAxis);
pm.Axes.Add(volAxis);
break;
case VolumeStyle.PositiveNegative:
volAxis.Minimum = naturalV ? double.NaN : -5000;
pm.Axes.Add(timeAxis);
pm.Axes.Add(barAxis);
pm.Axes.Add(volAxis);
break;
}
pm.Series.Add(series);
if (naturalY == false)
{
timeAxis.AxisChanged += (sender, e) => AdjustYExtent(series, timeAxis, barAxis);
}
var controller = new PlotController();
controller.UnbindAll();
controller.BindMouseDown(OxyMouseButton.Left, PlotCommands.PanAt);
return new Example(pm, controller);
}
/// <summary>
/// Adjusts the Y extent.
/// </summary>
/// <param name="series">Series.</param>
/// <param name="xaxis">Xaxis.</param>
/// <param name="yaxis">Yaxis.</param>
private static void AdjustYExtent(CandleStickAndVolumeSeries series, DateTimeAxis xaxis, LinearAxis yaxis)
{
var xmin = xaxis.ActualMinimum;
var xmax = xaxis.ActualMaximum;
var istart = series.FindByX(xmin);
var iend = series.FindByX(xmax, istart);
var ymin = double.MaxValue;
var ymax = double.MinValue;
for (int i = istart; i <= iend; i++)
{
var bar = series.Items[i];
ymin = Math.Min(ymin, bar.Low);
ymax = Math.Max(ymax, bar.High);
}
var extent = ymax - ymin;
var margin = extent * 0.10;
yaxis.Zoom(ymin - margin, ymax + margin);
}