public void InitializeChart(string chartAreaName, string seriesName, IQuoteBasic quote)
{
if (quote == null || quote.Count <= 1)
{
return;
}
var series = ChartSeries.FindByName(seriesName);
if (series == null)
{
return;
}
var seriesInfo = _dicChartAreaToSeriesInfo[chartAreaName].Find(s => s.SeriesName == seriesName);
if (seriesInfo == null)
{
return;
}
var max_index = quote.Count - 1;
var min_index = Math.Max(0, max_index - _maxNumbars);
var times = quote.Time.GetRange(min_index, max_index - min_index + 1).Select(t => t.GetUTCFromUnixTime().ToOADate()).ToList();
var high = quote.High.GetRange(min_index, max_index - min_index + 1).ToList();
var low = quote.Low.GetRange(min_index, max_index - min_index + 1).ToList();
var open = quote.Open.GetRange(min_index, max_index - min_index + 1).ToList();
var close = quote.Close.GetRange(min_index, max_index - min_index + 1).ToList();
_chart.InvokeIfRequired(c => series.Points.Clear());
_chart.InvokeIfRequired(c => series.Points.DataBindXY(times, high, low, open, close));
seriesInfo.MinTimeData = DateTime.FromOADate(times.FirstOrDefault()).GetUnixTimeFromUTC();
seriesInfo.MaxTimeData = DateTime.FromOADate(times.LastOrDefault()).GetUnixTimeFromUTC();
this.SetAxisRangeForChartArea(chartAreaName, series, seriesInfo);
}
public void UpdateChart(string chartAreaName, string seriesName, IQuoteBasic quote)
{
var series = ChartSeries.FindByName(seriesName);
if (series == null)
{
return;
}
var seriesInfo = _dicChartAreaToSeriesInfo[chartAreaName].Find(s => s.SeriesName == seriesName);
if (seriesInfo == null)
{
return;
}
var sindex = quote.Count - 1;
while (sindex >= 0 && quote.Time[sindex] > seriesInfo.MaxTimeData)
{
--sindex; //index must be -1 or quote.Time[index] <= maxTimeData
}
++sindex;
var num = quote.Count - sindex;
if (num <= 0)
{
return;
}
if (num > 1)
{
var points = series.Points.ToList();
var lst = Enumerable.Range(sindex, num).Select(i => new DataPoint(quote.Time[i].GetUTCFromUnixTime().ToOADate(), new List <double> {
quote.High[i], quote.Low[i], quote.Open[i], quote.Close[i]
}.ToArray()));
points.AddRange(lst);
_chart.InvokeIfRequired(c => series.Points.DataBindXY(
points.Select(l => l.XValue).ToList(),
points.Select(l => l.YValues[0]).ToList(),
points.Select(l => l.YValues[1]).ToList(),
points.Select(l => l.YValues[2]).ToList(),
points.Select(l => l.YValues[3]).ToList()));
}
else //num == 1
{
_chart.InvokeIfRequired(c => series.Points.AddXY(quote.LastTime.GetUTCFromUnixTime().ToOADate(), quote.High.Last(), quote.Low.Last(), quote.Open.Last(), quote.Close.Last()));
}
//remove first elements if gets too much data
if (series.Points.Count >= _maxNumbars * 10)
{
var points = series.Points.ToList();
points.RemoveRange(0, 9 * _maxNumbars);
_chart.InvokeIfRequired(c => series.Points.DataBindXY(
points.Select(l => l.XValue).ToList(),
points.Select(l => l.YValues[0]).ToList(),
points.Select(l => l.YValues[1]).ToList(),
points.Select(l => l.YValues[2]).ToList(),
points.Select(l => l.YValues[3]).ToList()));
}
//add the new data to series
seriesInfo.MinTimeData = DateTime.FromOADate(series.Points.FirstOrDefault().XValue).GetUnixTimeFromUTC();
seriesInfo.MaxTimeData = DateTime.FromOADate(series.Points.LastOrDefault().XValue).GetUnixTimeFromUTC();
this.SetAxisRangeForChartArea(chartAreaName, series, seriesInfo);
}
