def _calc_box_lats(ride, legend_height):
"""
Split the map into three equal pieces going top to bottom.
@param ride: ride representing map to split
@type ride: L{Ride}
@param legend_height: height of legend
@type legend_height: C{float}
@return: bottom min, bottom max, middle min, middle max, top min, top max
@rtype: C{float},C{float},C{float},C{float},C{float},C{float}
"""
# bottom
bottom_lat_min = ride.bounds.min_lat
bottom_lat_max, lon = pt_dist_from_pt(ride.bounds.min_lat,
ride.bounds.min_lon,
legend_height, 0)
# mid
mid_lat = (ride.bounds.min_lat + ride.bounds.max_lat) / 2.0
mid_dist = legend_height / 2.0
mid_lat_min, lon = pt_dist_from_pt(mid_lat, ride.bounds.min_lon,
mid_dist, 180)
mid_lat_max, lon = pt_dist_from_pt(mid_lat, ride.bounds.min_lon,
mid_dist, 0)
# top
top_lat_min, lon = pt_dist_from_pt(ride.bounds.max_lat,
ride.bounds.max_lon,
legend_height, 180)
top_lat_max = ride.bounds.max_lat
return bottom_lat_min, bottom_lat_max, \
mid_lat_min, mid_lat_max, \
top_lat_min, top_lat_max
def _calc_box_lons(ride, legend_width):
"""
Split the map into three equal pieces going left to right.
@param ride: ride representing map to split
@type ride: L{Ride}
@param legend_width: width of legend
@type legend_width: C{float}
@return: left min, left max, middle min, middle max, right min, right max
@rtype: C{float},C{float},C{float},C{float},C{float},C{float}
"""
# left
left_lon_min = ride.bounds.min_lon
lat, left_lon_max = pt_dist_from_pt(ride.bounds.min_lat,
ride.bounds.min_lon,
legend_width, 90)
# mid
mid_lon = (float(ride.bounds.min_lon) + float(ride.bounds.max_lon)) / 2.0
mid_dist = legend_width / 2.0
lat, mid_lon_min = pt_dist_from_pt(ride.bounds.min_lat, mid_lon,
mid_dist, 270)
lat, mid_lon_max = pt_dist_from_pt(ride.bounds.min_lat, mid_lon,
mid_dist, 90)
# right
lat, right_lon_min = pt_dist_from_pt(ride.bounds.max_lat,
ride.bounds.max_lon,
legend_width, 270)
right_lon_max = ride.bounds.max_lon
return left_lon_min, left_lon_max, \
mid_lon_min, mid_lon_max, \
right_lon_min, right_lon_max
def _gen_legend_item(lat, lon, text, dist, node_id):
"""
Generate a L{LegendNode}, and calculate a point below it. This allows us
to generate the items and "walk" them down the page in the process. We
end-up with legend items on successive lines on the map page.
@param lat: latitude of legend item
@type lat: C{float}
@param lon: longitude of legend item
@type lon: C{float}
@param text: text of legend item
@type text: C{string}
@param dist: distance down page for next item
@type dist: C{float}
@param node_id: L{NodeId} to generate id from
@type node_id: L{NodeId}
@return: L{LegendNode}, lat of next legend item, lon of next legend item
@rtype: L{LegendNode},C{float},C{float}
"""
node = LegendNode(node_id.next(), text, lat, lon)
lat, lon = pt_dist_from_pt(lat, lon, dist, 180)
return node, lat, lon
