ItemState <Path> ElementPipeline( int index, double valuex, double valueO, double valueH, double valueL, double valueC, object item, Recycler <Path, ItemState <Path> > recycler, BindingEvaluator bvl ) { // map through axes var y1 = ValueAxis.For(valueO); var y2 = ValueAxis.For(valueC); var y3 = ValueAxis.For(valueH); var y4 = ValueAxis.For(valueL); var leftx = CategoryAxis.For(valuex); var offsetx = BarOffset; var rightx = offsetx + BarWidth; // force them to be a min/max var topy = Math.Max(y1, y2); var bottomy = Math.Min(y1, y2); var highy = Math.Max(y3, y4); var lowy = Math.Min(y3, y4); _trace.Verbose($"{Name}[{index}] {valueO}/{valueH}/{valueL}/{valueC} ({offsetx},{topy}) ({rightx},{bottomy})"); // create geometry var path = recycler.Next(null); if (path == null) { return(null); } var pg = new PathGeometry(); // body (open/close) var body = PathHelper.Rectangle(offsetx, topy, rightx, bottomy); pg.Figures.Add(body); // upper shadow (high) var centerx = offsetx + (rightx - offsetx) / 2; var upper = PathHelper.Line(centerx, topy, centerx, highy); pg.Figures.Add(upper); // lower shadow (low) var lower = PathHelper.Line(centerx, bottomy, centerx, lowy); pg.Figures.Add(lower); var shim = new GeometryWithOffsetShim <PathGeometry>() { PathData = pg }; path.Item2.DataContext = shim; // establish the style for "forward" or "reverse" polarity BindTo(this, valueO < valueC ? nameof(PathStyle) : nameof(ReversePathStyle), path.Item2, Path.StyleProperty); // bind offset BindTo(shim, nameof(shim.Offset), path.Item2, Canvas.LeftProperty); var figs = new Tuple <double, PathFigure> [4]; figs[0] = new Tuple <double, PathFigure>(y1, body); figs[1] = new Tuple <double, PathFigure>(y2, body); figs[2] = new Tuple <double, PathFigure>(y3, upper); figs[3] = new Tuple <double, PathFigure>(y4, lower); if (bvl == null) { return(new SeriesItemState(index, leftx, BarOffset, y1, path.Item2, figs)); } else { var cs = bvl.For(item); return(new SeriesItemState_Custom(index, leftx, BarOffset, y1, cs, path.Item2, figs)); } }