private void draw(
Object parentGroup, GeometryIndex parentIndex, Polygon polygon, GraphicsContext graphics) {
String groupName = baseName;
if (parentIndex != null) {
groupName += "." + editingService.getIndexService().format(parentIndex);
}
Composite bgGroup = getOrCreateGroup(parentGroup, groupName + ".background");
Composite geometryGroup = getOrCreateGroup(parentGroup, groupName + ".geometries");
// Draw the exterior ring:
GeometryIndex shellIndex =
editingService
.getIndexService()
.addChildren(parentIndex, GeometryIndexType.TYPE_GEOMETRY, 0);
if (!polygon.isEmpty()) {
if (styleService.getBackgroundStyle() != null
&& styleService.getBackgroundStyle().getFillOpacity() > 0) {
graphics.drawPolygon(bgGroup, "background", polygon, findGeometryStyle(shellIndex));
}
draw(geometryGroup, shellIndex, polygon.getExteriorRing(), graphics);
}
// Draw the interior rings:
for (int i = 0; i < polygon.getNumInteriorRing(); i++) {
GeometryIndex holeIndex =
editingService
.getIndexService()
.addChildren(parentIndex, GeometryIndexType.TYPE_GEOMETRY, i + 1);
draw(geometryGroup, holeIndex, polygon.getInteriorRingN(i), graphics);
}
}
