/// <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(CandleStickSeries 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);
}
private void AdjustYAxisZoom()
{
var xmin = XAxis.ActualMinimum;
var xmax = XAxis.ActualMaximum;
Dictionary <string, (double min, double max)> zooms = new Dictionary <string, (double min, double max)>();
//adcjust candles and volume
if (Candles.Items.Count > 0)
{
var istart = Candles.FindByX(xmin);
var iend = Candles.FindByX(xmax, istart);
var ymin = double.MaxValue;
var ymax = double.MinValue;
var volMin = double.MaxValue;
var volMax = double.MinValue;
for (int i = istart; i <= iend; i++)
{
var bar = Candles.Items[i];
ymin = Math.Min(ymin, bar.Low);
ymax = Math.Max(ymax, bar.High);
var vol = Volumes.Items[i].BuyVolume + Volumes.Items[i].SellVolume;
volMin = Math.Min(volMin, vol);
volMax = Math.Max(volMax, vol);
}
var extent = ymax - ymin;
var margin = extent * 0.10;
zooms[this.Candles_Yaxis.Key] = (ymin - margin, ymax + margin);
this.Candles_Yaxis.Zoom(ymin - margin, ymax + margin);
this.Volume_Yaxis.Zoom(0, volMax);
}
//adjust other lines
//reset zoom of all exes
foreach (var line in this.Lines)
{
if (!line.IgnoreForZoom)
{
(double min, double max)zoom = (double.MaxValue, double.MinValue);
if (zooms.ContainsKey(line.YAxisKey))
{
zoom = zooms[line.YAxisKey];
}
foreach (var p in line.Points)
{
if (p.X > XAxis.ActualMinimum)
{
zoom.min = p.Y < zoom.min ? p.Y : zoom.min;
zoom.max = p.Y > zoom.max ? p.Y : zoom.max;
}
if (p.X > XAxis.ActualMaximum)
{
break;
}
}
zooms[line.YAxisKey] = zoom;
}
}
foreach (var axis in PlotViewModel.Axes)
{
if (zooms.ContainsKey(axis.Key))
{
var zoom = zooms[axis.Key];
axis.Zoom(zoom.min, zoom.max);
}
}
}
