def _draw_rings(self, dr: svgwrite.Drawing, g: svgwrite.container.Group,
center: XY, radius_range: ValueRange) -> None:
length_range = self.poster.length_range_by_date
if not length_range.is_valid():
return
min_length = length_range.lower()
max_length = length_range.upper()
assert min_length is not None
assert max_length is not None
ring_distance = self._determine_ring_distance(max_length)
if ring_distance is None:
return
distance = ring_distance
while distance < max_length:
radius = radius_range.interpolate(
(distance / max_length).magnitude)
g.add(
dr.circle(
center=center.tuple(),
r=radius,
stroke=self._ring_color,
stroke_opacity="0.2",
fill="none",
stroke_width=0.3,
))
distance += ring_distance
def _draw_circle_segment(
self,
dr: svgwrite.Drawing,
g: svgwrite.container.Group,
tracks: typing.List[Track],
a1: float,
a2: float,
rr: ValueRange,
center: XY,
) -> None:
length = sum([t.length() for t in tracks])
has_special = len([t for t in tracks if t.special]) > 0
color = self.color(self.poster.length_range_by_date, length,
has_special)
max_length = self.poster.length_range_by_date.upper()
assert max_length is not None
r1 = rr.lower()
assert r1 is not None
r2 = rr.interpolate((length / max_length).magnitude)
sin_a1, cos_a1 = math.sin(a1), math.cos(a1)
sin_a2, cos_a2 = math.sin(a2), math.cos(a2)
path = dr.path(
d=("M", center.x + r1 * sin_a1, center.y - r1 * cos_a1),
fill=color,
stroke="none",
)
path.push("l", (r2 - r1) * sin_a1, (r1 - r2) * cos_a1)
path.push(
f"a{r2},{r2} 0 0,0 {r2 * (sin_a2 - sin_a1)},{r2 * (cos_a1 - cos_a2)}"
)
path.push("l", (r1 - r2) * sin_a2, (r2 - r1) * cos_a2)
date_title = str(tracks[0].start_time().date())
str_length = utils.format_float(self.poster.m2u(length))
path.set_desc(title=f"{date_title} {str_length} {self.poster.u()}")
g.add(path)