void chartData_DataSeriesUpdated(object sender, ezDataSeriesUpdatedEventArgs e)
{
if (DataSeriesUpdated != null)
{
DataSeriesUpdated(this, e);
}
}
void chartDataSeries_DataSeriesUpdated(object sender, DataSeriesUpdatedEventArgs e)
{
Spy.Print("DataSeriesUpdated (on thread)");
if (e.TradeBarIndexUpdate == -1)
{
return;
}
var update = new ezDataSeriesUpdatedEventArgs(e.ModeIndexUpdate, e.SettlementIndexUpdate, e.TradeBarIndexUpdate);
for (int i = e.TradeBarIndexUpdate; i < ctsChartData.TradeBars.Count; i++)
{
if (i >= chartData.TradeBars.Count)
{
BarDataPoint bdp = ctsChartData.TradeBars[i] as BarDataPoint;
var ezBar = new ezBarDataPoint();
ezBar.Open = bdp.OpenTicks;
ezBar.High = bdp.HighTicks;
ezBar.Low = bdp.LowTicks;
ezBar.Close = bdp.CloseTicks;
ezBar.TradeCount = bdp.TradeCount;
ezBar.Volume = bdp.Volume;
ezBar.TradeDate = bdp.TradeDate;
ezBar.Time = bdp.Time;
chartData.TradeBars.Add(ezBar);
}
else
{
BarDataPoint bdp = ctsChartData.TradeBars[i] as BarDataPoint;
//var ezBar = new ezBarDataPoint(bdp.OpenTicks, bdp.HighTicks, bdp.LowTicks, bdp.CloseTicks, bdp.TradeCount, bdp.Volume, bdp.TradeDate, bdp.Time);
var ezBar = new ezBarDataPoint();
ezBar.Open = bdp.OpenTicks;
ezBar.High = bdp.HighTicks;
ezBar.Low = bdp.LowTicks;
ezBar.Close = bdp.CloseTicks;
ezBar.TradeCount = bdp.TradeCount;
ezBar.Volume = bdp.Volume;
ezBar.TradeDate = bdp.TradeDate;
ezBar.Time = bdp.Time;
chartData.UpdateTradeBar(i, ezBar);
}
}
chartData.DataProviderSeriesUpdated(update);
}
private void // ERROR: Handles clauses are not supported in C#
moBarData_DataSeriesUpdated(object sender, ezDataSeriesUpdatedEventArgs e)
{
// NOTE: This event is raised on it's own thread. If you are updating a GUI application with the chart data (like this example), don't forget that you
// MUST marshall this update onto the GUI thread before you modify any GUI components.
// (This is the same for all T4 API events.)
if (this.InvokeRequired)
{
// An invoke is required to update the GUI, simply invoke back to this same mthod.
this.BeginInvoke(new ezDataSeriesUpdatedEventHandler(moBarData_DataSeriesUpdated), new object[] {
sender,
e
});
// Don't forget to exit now!
return;
}
//On the GUI thread now, update the chart.
// Before iterating the data collection, you MUST lock it. This will prevent live trade updates from modifying the collection as you read it.
chartDataProvider.Lock();
try
{
//e.TradeBarIndexUpdate is the index of the first bar that was added or updated since the last update event.
for (int i = e.TradeBarIndexUpdate; i <= chartDataProvider.ChartData.TradeBars.Count - 1; i++)
{
ezBarDataPoint oBar = (ezBarDataPoint)chartDataProvider.ChartData.TradeBars[i];
if (i < chart1.Series[0].Points.Count)
{
Spy.Print("Updating bar index {0} - close = {1}", i, oBar.Close);
// Update the chart series.
DataPoint dp1 = chart1.Series[0].Points[i];
dp1.YValues[0] = oBar.High;
dp1.YValues[1] = oBar.Low;
dp1.YValues[2] = oBar.Open;
dp1.YValues[3] = oBar.Close;
DataPoint dp2 = chart1.Series[1].Points[i];
dp2.YValues[0] = oBar.Volume;
RecalcAllActiveSeries();
chart1.Refresh();
}
else
{
xAxis = chart1.ChartAreas["ChartAreaMain"].AxisX;
bool scrollToFurthest = (xAxis.ScaleView.ViewMaximum == xAxis.Maximum);
AddBarToChart(oBar);
RecalcAllActiveSeries();
chart1.Refresh();
if (scrollToFurthest == true)
{
xAxis.ScaleView.Scroll(xAxis.Maximum);
}
}
}
}
catch (Exception ex)
{
Spy.Print("Error updating chart data: " + ex.ToString());
status.Text = "Error updating chart data: " + ex.ToString();
}
finally
{
// If you don't be sure to unlock the data collection, you probably won't get any live trade updates.
chartDataProvider.Unlock();
}
}