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class Arrow:
"""
Helper class for creating arrows with connections
"""
def __init__(self, origin, target, lane=None, kind=None, description=None):
"""
Arrow object with origin Component_box and target component_box
"""
self.origin = origin
self.target = target
self.kind = kind
self.description=description
self.lane = lane
self.sub_lane = 0
self.lane_width = None
self.lane_offset = 0
self.box_offset_origin = 0
self.box_offset_target = 0
self.origin_linestyle = "-"
self.color = "blue"
self.alpha = 1.0
self.arrow_width = 0.003
self.arrow_length = 0.01
self.connection = False
self.origin_congested = False
self.target_congested = False
def set_lane(self, lane):
self.lane = lane
def set_sub_lane(self, lane):
self.sub_lane = lane
def set_lane_width(self, lane_width):
self.lane_width = lane_width
def set_lane_offset(self, offset):
self.lane_offset = offset
def get_lane_value(self):
return self.lane_width * (self.lane + self.sub_lane * self.lane_offset)
def set_connection(self, value):
self.connection = value
def set_origin_congested(self, value):
self.origin_congested = value
def set_target_congested(self, value):
self.target_congested = value
def set_box_offset_origin(self, value):
"""
In units of box height
"""
self.box_offset_origin = value
def get_box_offset_origin(self):
return self.origin.box_height * self.box_offset_origin
def set_box_offset_target(self, value):
"""
In units of box height
"""
self.box_offset_target = value
def get_box_offset_target(self):
return self.target.box_height * self.box_offset_target
def set_arrow_width(self, value):
self.arrow_width = value
def set_arrow_length(self, value):
self.arrow_length = value
def set_linestyle(self, value):
self.origin_linestyle = value
def set_alpha(self, value):
self.alpha = value
def plot_left_side(self, ax):
# stop a bit before the lane and make a little triangle
triangle_leg_x = 0.25 * self.arrow_length
triangle_leg_y = 2.0 * self.arrow_width
# box to lane
origin_x = self.origin.get_text_start()
origin_y = self.origin.position_y + self.get_box_offset_origin()
origin_lane_x = origin_x - self.get_lane_value()
origin_lane_y = origin_y
entry_point_x = origin_lane_x + triangle_leg_x
x_points = [origin_x, entry_point_x]
y_points = [origin_y, origin_lane_y]
# lane
target_x = self.target.get_text_start()
target_y = self.target.position_y + self.get_box_offset_target()
target_lane_x = target_x - self.get_lane_value()
target_lane_y = target_y
exit_point_x = target_lane_x + triangle_leg_x
# Plot lane but ease in and out of the lane with a small triangle
x_points += [entry_point_x, origin_lane_x, origin_lane_x, target_lane_x, origin_lane_x, exit_point_x]
y_points += [origin_lane_y, origin_lane_y + triangle_leg_y, origin_lane_y + triangle_leg_y,
target_lane_y - triangle_leg_y, target_lane_y - triangle_leg_y, target_lane_y]
ax.plot(x_points, y_points, color=self.color, linestyle=self.origin_linestyle)
# lane to box
arrow_length = self.target.get_text_start() - target_lane_x - triangle_leg_x
ax.arrow(x=target_lane_x + triangle_leg_x, y=target_lane_y,
dx=arrow_length, dy=0,
color=self.color, length_includes_head=True,
width=self.arrow_width, head_width=5.0*self.arrow_width,
head_length=self.arrow_length)
def plot_right_side(self, ax, text_end):
# stop a bit before the lane and make a little triangle
triangle_leg_x = 0.25 * self.arrow_length
triangle_leg_y = 2.0 * self.arrow_width
# origin to lane
origin_x = self.origin.get_text_end()
origin_y = self.origin.position_y + self.get_box_offset_origin()
origin_lane_x = text_end + self.get_lane_value()
origin_lane_y = origin_y
entry_point_x = origin_lane_x - triangle_leg_x
x_points = [origin_x, entry_point_x]
y_points = [origin_y, origin_lane_y]
"""
ax.plot([origin_x, entry_point_x], [origin_y, origin_lane_y],
color=self.color, linestyle=self.origin_linestyle, alpha=self.alpha)
"""
if self.description is not None and not self.origin_congested:
bbox = dict(boxstyle="round", facecolor="white", edgecolor="white", alpha=0.85)
ax.text(0.5*(origin_x + origin_lane_x), origin_lane_y,
self.description, ha="center", va="center", bbox=bbox)
# lane
target_y = self.target.position_y + self.get_box_offset_target()
target_lane_x = text_end + self.get_lane_value()
target_lane_y = target_y
exit_point_x = target_lane_x - triangle_leg_x
if target_lane_y < origin_lane_y:
leg_dir = 1
else:
leg_dir = -1
triangle_leg_y_dir = leg_dir * triangle_leg_y
# Plot lane but ease in and out of it with a small triangle
x_points += [entry_point_x, target_lane_x, origin_lane_x, target_lane_x, origin_lane_x, exit_point_x]
y_points += [origin_lane_y, origin_lane_y - triangle_leg_y_dir, origin_lane_y - triangle_leg_y_dir,
target_lane_y + triangle_leg_y_dir, target_lane_y + triangle_leg_y_dir, target_lane_y]
ax.plot(x_points, y_points, color=self.color, alpha=self.alpha, linestyle=self.origin_linestyle)
# target
if self.connection:
mid_point = 0.5*(target_lane_x + self.target.get_text_end())
ax.plot([target_lane_x - triangle_leg_x, self.target.get_text_end()],
[target_lane_y, target_lane_y], color=self.color, alpha=self.alpha)
else:
arrow_length = target_lane_x - self.target.get_text_end() - triangle_leg_x
mid_point = target_lane_x - 0.5*arrow_length
ax.arrow(x=target_lane_x - triangle_leg_x, y=target_lane_y,
dx=-arrow_length, dy=0,
color=self.color, length_includes_head=True,
width=self.arrow_width, head_width=5.0*self.arrow_width,
head_length=self.arrow_length, alpha=self.alpha)
if self.description is not None and not self.target_congested:
bbox = dict(boxstyle="round", facecolor="white", edgecolor="white", alpha=0.85)
ax.text(mid_point, target_lane_y,
self.description, ha="center", va="center", bbox=bbox)
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