Hex PathGeometry fill instead of drawing border only - wpf

Question

I have a descendent of FrameworkElement with the following methods:
class HexVisual : FrameworkElement {
/* ... */
private PathGeometry GetHexGeometry(Hexagon Hexagon) {
var geometry = default(PathGeometry);
if(mHexGeometries.TryGetValue(Hexagon, out geometry)){
return geometry;
}
PathFigure figure = new PathFigure();
int i = 0;
foreach (Point point in Hexagon.Polygon.Points) {
if (i == 0) {
figure.StartPoint = point;
i++;
continue;
}
figure.Segments.Add(new LineSegment(point, true));
}
geometry = new PathGeometry();
geometry.Figures.Add(figure);
geometry.FillRule = FillRule.Nonzero;
return geometry;
}
private DrawingVisual CreateHexVisual() {
DrawingVisual visual = new DrawingVisual();
using (DrawingContext context = visual.RenderOpen()) {
context.DrawGeometry(BorderBrush, BorderPen, mHexGeometry);
}
return visual;
}
}
When I add this visual to the Canvas, I am getting a filled hexagon rather than just the stroke (border).
What am I doing wrong here that is causing the geometry to fill?

Answer 1

Not sure if I really understand your question, because you can't "add visuals to a Canvas", but maybe you just set BorderBrush to null or Transparent, or replace
context.DrawGeometry(BorderBrush, BorderPen, mHexGeometry);
with
context.DrawGeometry(null, BorderPen, mHexGeometry);