MouseDown event does not fire on Xamarin Mac graph points

[pkoscierzynski]

I am trying to implement a handling clicks on points marked on the graph in Xamarin Mac application. However, the MouseDown event is never call when a point displayed on the graph is clicked.
The same code works fine on Windows version of the same application.

var pointAnnotation = new LineSeries
{
Title = GetYAxisName(graphType),
StrokeThickness = 0,
LineLegendPosition = LineLegendPosition.None,
MarkerFill = OxyColors.DarkTurquoise,
MarkerStroke = OxyColors.DarkTurquoise,
MarkerType = MarkerType.Circle,
TrackerKey = "Calculations",
MarkerSize = 5
};

/// Adding points in the loop
pointAnnotation.Points.Add(new DataPoint((double)valueX, (double)valueY);
//

//adding event handler
pointAnnotation.MouseDown += (s, e) =>
{
if (e.ChangedButton == OxyMouseButton.Left)
{
e.Handled = true;
}
};

[chaselal]

@pkoscierzynski You need to add an NSTrackingArea to the PlotView with NSView.AddTrackingArea. Something like:

var options = NSTrackingAreaOptions.ActiveAlways | NSTrackingAreaOptions.MouseEnteredAndExited | NSTrackingAreaOptions.InVisibleRect | NSTrackingAreaOptions.MouseMoved;
plotView.AddTrackingArea(new NSTrackingArea(plotView.Bounds, options, plotView, null);