oval inverted fixed

                        svg.setAttribute("style", "display: block; width: 100%; height: 100%;");

                        libhtmlpp::HtmlElement svgPath("path");

                        // "oval_inverted" is inverted by default; the checkbox then

                        // toggles from there, so checking it on oval_inverted flips

                        // back to the plain oval look instead of stacking.

                        bool effectiveInvert = shapeDividerFlip != (shapeDividerType == "oval_inverted");

                        // "oval_inverted" is always inverted, independent of the

                        // checkbox -- XOR-ing it in used to make checking "invert"

                        // on oval_inverted jump to the unrelated plain-oval look,

                        // which read as the checkbox doing the wrong thing. Now the

                        // checkbox simply has no effect on this type (it's already

                        // the inverted preset) and keeps its normal effect on the

                        // other shapes.

                        bool effectiveInvert = (shapeDividerType == "oval_inverted") || shapeDividerFlip;

                        if (effectiveInvert) {

                            // "Invert" swaps which side of the curve is filled

                            // (convex bulge <-> concave notch) by adding a