Tag: RenderContext

Have a good day!

I’m working with render context in modifiers. I have this code snippet:

public override void OnParentSurfaceRendered(SciChartRenderedMessage e)
        {
            if (Mouse.LeftButton == MouseButtonState.Pressed&&IsEnabled)
            {
                if (ParentSurface == null) return;
                var yCalc = ParentSurface.YAxes.GetAxisById(TextOfYAxis);
                var startTVD = yCalc.GetDataValue(StartPoint.Y);
                var finalTVD = yCalc.GetDataValue(CurrentPoint.Y);
                var deltaTVD = Math.Round((double) finalTVD - (double) startTVD);
                var pen = e.RenderContext.CreatePen(Colors.Red,true,1);
                var brush = e.RenderContext.CreateBrush(Colors.Red);
                e.RenderContext.DrawLine(pen, StartPoint, new Point(StartPoint.X, CurrentPoint.Y));
                e.RenderContext.DrawEllipse(pen, brush, StartPoint, 4, 4);
                e.RenderContext.DrawEllipse(pen,brush,new Point(StartPoint.X,CurrentPoint.Y),2,2);
                e.RenderContext.DrawText(
                    new Rect(new Point(CurrentPoint.X - 20, CurrentPoint.Y - 20), new Size(100, 30)), Colors.Red, 10,
                    "Delta TVD:" + Math.Round(Geomodel.DeltaTVD + deltaTVD, 2));
                pen.Dispose();
            }
        }

My aim is to place rectangle below line series.
Is there any way to work with z-index of such method of drawing?

Hello, everybody

I am working with drawing text in InternalDraw of FastLineRenderableSeries method.
I have got two questions:

1) When I am changing FontSize dynamically, I get this picture (img 1). How can I fix this problem? P.S. this problem starts to appear when I display two or more renderable series.

2) Is there any method or simple way to get all visible points from FastLineRenderableSeries?
Thanks in advance