Hello again! 🙂
This time I am trying to draw marker for a maximum numeric data value in chart with CategoryDateTime X axis.
I have my X axis defined like this:
id<SCIAxis2D> xAxis = [[SCICategoryDateTimeAxis alloc] init];
and I am trying to draw a marker in draw() method of a custom modifier using this code:
id<SCIRenderPassData> data = [_rSeries currentRenderPassData]; id<SCICoordinateCalculator> xCalc = [data xCoordinateCalculator]; id<SCICoordinateCalculator> yCalc = [data yCoordinateCalculator]; NSLog(@"Is category calc: %d", [xCalc isCategoryAxisCalculator]); double xCoord = [xCalc getCoordinateFromDate:_xValue]; double yCoord = [yCalc getCoordinateFrom:_yValue]; [_marker drawToContext:context AtX:xCoord Y:yCoord];
My _xValue is computed and set from outside and is for sure is a valid date on X axis for which I need to draw the marker on.
My problem is that:
My questions are:
Looking forward to your always useful reply. 🙂
I am using a SciStockChart and trying to add Trade Markers as outlined here https://www.scichart.com/annotations-adding-trade-markers-to-a-chart/. However, I am not getting a proper xCoordinate from the coordinate calculator. I believe SciStockChart is using a CategoryCoordinateCalculator and I must do an extra step in order to get the proper result from the DateTime input. Here is the line that is not working correctly. double xCoord = xCoordCalculator.GetCoordinate(trade.ExecutionTime.Value); Is there another step I need to take in order to get the proper xCoord value?