private void InterpolatePosition(IMarkerViewModel mvm, ref PointAnnotation annotation)
{
foreach (OxyPlot.Series.ScatterSeries series in PlotModel.Series)
{
List <DataPoint> seriesData = series.ItemsSource as List <DataPoint>;
for (int i = 0; i < seriesData.Count; i++)
{
if (seriesData[i].T >= mvm.Time)
{
var lastIndex = i > 0 ? i - 1 : i;
var nextData = seriesData[i];
var lastData = seriesData[lastIndex];
var t = mvm.Time.Ticks;
var t_0 = lastData.T.Ticks;
var t_1 = nextData.T.Ticks;
double frac = (t - t_0) / (double)(t_1 - t_0);
// Do backward linear interpolation
// d = d_0 + (d_1-d_0)\frac{t - t_0}{t_1-t_0}
annotation.Y = lastData.Y + (nextData.Y - lastData.Y) * frac;
annotation.X = lastData.X + (nextData.X - lastData.X) * frac;
break;
}
}
}
}
public override void AddAnnotation(IMarkerViewModel mvm)
{
var annotation = new PointAnnotation();
annotation.Text = mvm.Title;
annotation.Tag = mvm;
InterpolatePosition(mvm, ref annotation);
mvm.PropertyChanged += (a, b) =>
{
var annotations = (from anno in this.PlotModel.Annotations where anno.Tag == a select anno).ToList();
for (int i = 0; i < annotations.Count; i++)
{
annotation.Text = mvm.Title;
InterpolatePosition(mvm, ref annotation);
}
this.PlotModel.InvalidatePlot(false);
};
this.PlotModel.Annotations.Add(annotation);
this.PlotModel.InvalidatePlot(false);
}
public virtual void AddAnnotation(IMarkerViewModel mvm)
{
mvm.PropertyChanged += (a, b) =>
{
foreach (LineAnnotation item in this.PlotModel.Annotations)
{
if (item.Tag == a)
{
item.X = OxyPlot.Axes.DateTimeAxis.ToDouble(mvm.Time);
item.Text = mvm.Title;
this.PlotModel.InvalidatePlot(false);
}
}
};
var vline = new LineAnnotation();
vline.Type = LineAnnotationType.Vertical;
vline.X = OxyPlot.Axes.DateTimeAxis.ToDouble(mvm.Time);
vline.Text = mvm.Title;
vline.Tag = mvm;
this.PlotModel.Annotations.Add(vline);
this.PlotModel.InvalidatePlot(false);
}
private void Execute_RemoveMarkerCommand(IMarkerViewModel marker)
{
MarkerViewModel vm = marker as MarkerViewModel;
this.ProjectModel.Markers.Remove(vm?.markerModel);
}