public override void OnParentSurfaceRendered(SciChartRenderedMessage e)
{
base.OnParentSurfaceRendered(e);
// TODO here: Modify which RenderableSeries are passed in to GetSeriesInfo to alter output
var seriesInfos = this.GetSeriesInfo(ParentSurface.RenderableSeries);
// TODO here: if you experience flicker, it is a .NET4.5 bug. This occurs when updating an ObservableCollection
// the solution believe it or not is to do a differential update, e.g. only change the SeriesInfo instance if a series was added or removed
LegendData.SeriesInfo = new ObservableCollection <SeriesInfo>(seriesInfos);
}
/// <summary>
/// Called when the parent <see cref="SciChartSurface" /> is rendered. Here is where we draw selected points
/// </summary>
/// <param name="e">The <see cref="SciChartRenderedMessage" /> which contains the event arg data</param>
public override void OnParentSurfaceRendered(SciChartRenderedMessage e)
{
base.OnParentSurfaceRendered(e);
var selectedPoints = this.SelectedPoints;
if (selectedPoints == null)
{
return;
}
double size = SelectedPointSize;
// Create Fill brush for the point marker
using (var fill = e.RenderContext.CreateBrush(SelectedPointColor))
{
// Iterating over renderable series
foreach (var renderSeries in selectedPoints.Keys)
{
// Create stroke pen based on r-series color
using (var stroke = e.RenderContext.CreatePen(renderSeries.Stroke, true, 1.0f))
{
// We need XAxis/YAxis.GetCurrentCoordinateCalculator() from the current series (as they can be per-series)
// to convert data points to pixel coords
var xAxis = renderSeries.XAxis;
var yAxis = renderSeries.YAxis;
var xCalc = xAxis.GetCurrentCoordinateCalculator();
var yCalc = yAxis.GetCurrentCoordinateCalculator();
var pointList = selectedPoints[renderSeries];
// Iterate over the selected points
foreach (var point in pointList)
{
// Draw the selected point marker
e.RenderContext.DrawEllipse(
stroke,
fill,
new Point(xCalc.GetCoordinate(point.XValue), yCalc.GetCoordinate(point.YValue)),
size,
size);
}
}
}
}
}
public override void OnParentSurfaceRendered(SciChartRenderedMessage e)
{
base.OnParentSurfaceRendered(e);
// TODO HERE: You could perform a hit-test again and update your ellipse positions on the rendered event
}
