def draw_pipe_comp(self, ctx, comp, fill=False,
outline=False, edges=False):
"""
Intercepts the superclass function to provide for curved casings.
"""
if self.casing_type == "onepiece" and comp[0] == "c":
self.draw_curved_bend(ctx, comp, fill=fill,
outline=outline, edges=edges)
else:
Pipe.draw_pipe_comp(self, ctx, comp, fill=fill,
outline=outline, edges=edges)
def __init__(self, length, casingod, casingid, liningod, liningid, flange):
"""
Initializes a PipeStraight instance.
Arguments:
length -- length of straight, in mm
casingod -- outside diameter of casing, in mm
casingid -- inside diameter of casing, in mm
liningod -- outside diameter of lining, in mm
liningid -- inside diameter of lining, in mm
"""
# Call superclass constructor
Pipe.__init__(self, casingod, casingid, liningod, liningid, flange)
# Straight properties
self.length = length
self.len_dim_line_length = 0
self.len_dim_line_length_offset_m = 1
self.len_dim_line_length_width_m = 2
# Calculate straight component points
pc_pts_out = {}
pc_pts_in = {}
pc_pts_ctr = []
for comp in ["co", "ci", "lo", "li"]:
pc_pts_out[comp] = []
pc_pts_in[comp] = []
for y in [0, -self.length]:
pc_pts_out[comp].append(Point(self.p_rad[comp], y))
pc_pts_in[comp].append(Point(-self.p_rad[comp], y))
pc_pts_in[comp].reverse()
for y in [0, -self.length]:
pc_pts_ctr.append(Point(0, y))
self.pc_pts = {"in": pc_pts_in, "out": pc_pts_out,
"ctr": pc_pts_ctr}
def draw_component(self, ctx, page_w, page_h):
"""
Draws a straight. Mainly calls supporting functions.
This function is called by the 'component' base class.
Arguments:
ctx -- a Pycairo context
page_w, page_h -- width and height of drawing area
"""
# Call the parent function...
Pipe.draw_component(self, ctx, page_w, page_h)
# ...and then provide straight-specific drawing functionality.
self.draw_center_line(ctx)
self.draw_len_dim(ctx)
def draw_component(self, ctx, page_w, page_h):
"""
Draws a bend. Mainly calls supporting functions.
This function is called by the 'component' base class.
Arguments:
ctx -- a Pycairo context
page_w, page_h -- width and height of drawing area
"""
# Call the superclass function...
Pipe.draw_component(self, ctx, page_w, page_h)
# ...and then provide bend-specific drawing functionality.
self.draw_ribs(ctx, "li")
self.draw_center_arc(ctx)
self.draw_arc_dims(ctx)
if self.ex_dim_drg:
self.draw_seg_dims(ctx)
def set_scale(self, ctx, page_w, page_h):
"""
Automatically sets a scale factor for the straight drawing.
Arguments:
ctx -- a Pycairo context
page_w, page_h -- width and height of drawing area
"""
pipelen = self.length
fld = self.diameters["fo"]
flr = self.p_rad["fo"]
# Calculate radius dimension line lengths, these vary based
# on font size, and need to be considered for scaling along
# the y-axis. These dimensions will be upscaled during the
# final drawing, and will be independent of the scale factor
# calculated.
rad_values = []
for comp in ["co", "ci", "lo", "li"]:
rad_values.append(str(int(round(self.diameters[comp]))))
rdm = get_largest_text_height(ctx, rad_values, self.text["dims"], True)
self.dim_line_length = rdm
rdm = self.dim_line_length * 4
# Calculate length dimension width, this can vary based both
# on font size and on the length itself, and needs to be
# considered for scaling along the x-axis. This dimension will
# be upscaled during the final drawing, and will be independent
# of the scale factor calculated.
len_values = []
len_values.append(str(int(round(self.length))))
ldm = get_largest_text_width(ctx, len_values, self.text["dims"], True)
self.len_dim_line_length = ldm
ldm *= (self.len_dim_line_length_offset_m +
self.len_dim_line_length_width_m)
# Calculate x and y scale factors
x_scale = (page_w - ldm) / fld
y_scale = (page_h - rdm) / (pipelen + flr)
# Scale based on the smallest factor
self.scale = min(x_scale, y_scale)
ctx.scale(self.scale, self.scale)
# Set the origin based on calculated scale
page_w /= self.scale
bend_w = fld + ldm / self.scale
x_origin = (page_w - bend_w) / 2 + flr
page_h /= self.scale
bend_h = pipelen + flr + rdm / self.scale
y_origin = page_h - (page_h - bend_h) / 2 - flr
ctx.translate(x_origin, y_origin)
# Upscale line lengths
self.len_dim_line_length /= self.scale
# Call superclass function
Pipe.set_scale(self, ctx, page_w, page_h)
def __init__(self, nomrad, casingod, casingid, liningod,
liningid, bendangle, segangle, ctype, flange,
exdimdrg, exdimbox):
"""
Initializes a PipeBend instance.
Arguments:
nomrad -- nominal radius, in mm
casingod -- outside diameter of casing, in mm
casingid -- inside diameter of casing, in mm
liningod -- outside diameter of lining, in mm
liningid -- inside diameter of lining, in mm
bendangle -- angle, in degrees, of overall bend
segangle -- angle, in degrees, of each bend segment
ctype -- type of casing, either "onepiece" or "segmented"
exdimdrg -- True to show segment dimensions on main drawing
exdimbox -- True to show segment dimensions in an infobox
"""
# Call superclass constructor
Pipe.__init__(self, casingod, casingid, liningod, liningid, flange)
# Page dimensions and properties
self.dos_dim_line_length = 30
self.dos_dim_dp = 3
# Bend angles, properties and information
self.bend_arc_d = bendangle
self.segment_angle_d = segangle
self.bend_arc = radians(bendangle)
self.segment_angle = radians(segangle)
self.num_segments = int(self.bend_arc / self.segment_angle)
self.casing_type = ctype
self.ex_dim_box = exdimbox
self.ex_dim_drg = exdimdrg
# Bend diameters and radii
fod = self.flange.flange_diameter
self.diameters["nom"] = nomrad * 2
outer_radii = {"nom": nomrad,
"co": nomrad + casingod / 2.0,
"ci": nomrad + casingid / 2.0,
"lo": nomrad + liningod / 2.0,
"li": nomrad + liningid / 2.0,
"fo": nomrad + fod / 2.0}
inner_radii = {"nom": nomrad,
"co": nomrad - casingod / 2.0,
"ci": nomrad - casingid / 2.0,
"lo": nomrad - liningod / 2.0,
"li": nomrad - liningid / 2.0,
"fo": nomrad - fod / 2.0}
self.radii = {"inner": inner_radii,
"outer": outer_radii,
"nom": nomrad}
# Calculate and store segment dimensions
# pylint: disable=C0103
self.segdims = {}
for k, i, d, l in zip(["cex", "cin", "lex", "lin", "mean"],
["outer", "inner", "outer", "inner", "outer"],
["co", "co", "lo", "lo", "nom"],
["Casing seg. extra. length",
"Casing seg. intra. length",
"Lining seg. extra. length",
"Lining seg. intra. length",
"Mean seg. length"]):
dim = self.radii[i][d] * tan(self.segment_angle / 2) * 2
self.segdims[k] = LabeledValue(l, dim)
# pylint: enable=C0103
# Calculate segmented component points
pc_pts_out = {}
pc_pts_in = {}
for k in ["co", "ci", "lo", "li"]:
pc_pts_out[k] = self.get_segment_points(self.radii["outer"][k])
pc_pts_in[k] = self.get_segment_points(self.radii["inner"][k])
pc_pts_in[k].reverse()
pc_pts_ctr = self.get_segment_points(self.radii["nom"])
self.pc_pts = {"in": pc_pts_in, "out": pc_pts_out,
"ctr": pc_pts_ctr}
def set_scale(self, ctx, page_w, page_h):
"""
Automatically sets a scale factor for the bend drawing.
Arguments:
ctx -- a Pycairo context
page_w, page_h -- width and height of drawing area
"""
b_arc = self.bend_arc
cri = self.radii["inner"]["co"]
cro = self.radii["outer"]["co"]
bfr = self.radii["outer"]["fo"]
flr = self.p_rad["fo"]
# Calculate segment dimension line lengths
dim_values = []
dpt = self.dos_dim_dp
for dim in ["cex", "cin", "lex", "lin"]:
dim_values.append(str(round(self.segdims[dim].value, dpt)))
ddm = get_largest_text_width(ctx, dim_values, self.text["dims"], True)
self.dos_dim_line_length = ddm
# Calculate radius dimension line lengths, these vary based
# on font size, and need to be considered for scaling along
# the axes. These dimensions will be upscaled during the
# final drawing, and will be independent of the scale factor
# calculated.
rad_values = []
for comp in ["co", "ci", "lo", "li"]:
rad_values.append(str(int(round(self.diameters[comp]))))
rdm = get_largest_text_width(ctx, rad_values, self.text["dims"], True)
self.dim_line_length = rdm
rdm = self.dim_line_length * 4
# Calculate x scale factor
# dos_s not yet implemented. Under some circumstances the segment
# dimension lines on the drawing can extend past the right edge
# of the drawing extent currently calculated here. The option to
# suppress the dimension lines and relegate them to a box is
# available, so problem is minor. Scaling depends upon whether
# casing is one-piece of segments, whether the option to show
# the segment dimensions was shown, and so on, so is more
# complicated than the options shown here. Approach should be
# the same, calculate the width including the segment dimension
# lines under the selected options, and then scale based on that
# if it turns out to be the largest of the calculated width. Then
# set the x origin accordingly.
#n = ns//2 + (ns%2)
#dx = ptoc(sa*n,ddm*1.5).x
#pt = self.pc_pts["out"]["co"][n]
#dos_w = pt.x
rad_w = bfr
ang_w = rad_w - cos(b_arc) * cri
dm_w = cos(pi / 2 - b_arc) * rdm
#dos_s = (page_w - dx) / dos_w
rad_s = page_w / bfr
ang_s = (page_w - dm_w) / ang_w
x_scale = min(rad_s, ang_s)
# Calculate y scale factor
rad_h = sin(b_arc) * bfr + flr
ang_h = sin(b_arc) * cro + flr
dm_h = sin(pi / 2 - b_arc) * rdm
y_scale = min(page_h / rad_h, (page_h - dm_h) / ang_h)
# Set scale based on smallest factor
self.scale = min(x_scale, y_scale)
ctx.scale(self.scale, self.scale)
# Set bend origin based on calculated scale
page_w /= self.scale
bend_w = max(rad_w, ang_w + dm_w / self.scale)
x_origin = page_w - (page_w - bend_w) / 2 - bfr
page_h /= self.scale
bend_h = max(rad_h, ang_h + dm_h / self.scale)
y_origin = page_h - (page_h - bend_h) / 2 - flr
ctx.translate(x_origin, y_origin)
# Scale lines
self.dos_dim_line_length /= self.scale
# Call superclass function
Pipe.set_scale(self, ctx, page_w, page_h)
