250 lines
11 KiB
Python
250 lines
11 KiB
Python
#!/usr/bin/env python3
|
|
'''
|
|
Copyright (C) 2017 Artem Synytsyn a.synytsyn@gmail.com
|
|
|
|
#TODO: Code cleaning and refactoring
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
'''
|
|
|
|
import inkex
|
|
from lxml import etree
|
|
from math import *
|
|
|
|
class KnobScale(inkex.EffectExtension):
|
|
|
|
def add_arguments(self, pars):
|
|
# General settings
|
|
pars.add_argument("--x", type=float, default=0.0, help="Center X")
|
|
pars.add_argument("--y", type=float, default=0.0, help="Center Y")
|
|
pars.add_argument("--radius", type=float, default=100.0, help="Knob radius")
|
|
pars.add_argument("--linewidth", type=float, default=1)
|
|
pars.add_argument("--angle", type=float, default=260.0, help="Angle of the knob scale in degrees")
|
|
pars.add_argument("--draw_arc", type=inkex.Boolean, default='True')
|
|
pars.add_argument("--draw_centering_circle", type=inkex.Boolean, default='False')
|
|
pars.add_argument("--logarithmic_scale", type=inkex.Boolean, default='False', help="")
|
|
pars.add_argument("-u", "--units", default="px", help="units to measure size of knob")
|
|
|
|
# Tick settings
|
|
pars.add_argument("--n_ticks", type=int, default=5)
|
|
pars.add_argument("--ticksize", type=float, default=10)
|
|
pars.add_argument("--n_subticks", type=int, default=10)
|
|
pars.add_argument("--subticksize", type=float, default=5)
|
|
pars.add_argument("--style", default='marks_outwards', help="Style of marks")
|
|
|
|
# Label settings
|
|
pars.add_argument("--labels_enabled", type=inkex.Boolean, default='False')
|
|
pars.add_argument("--rounding_level", type=int, default=0)
|
|
pars.add_argument("--text_size", type=float, default=1)
|
|
pars.add_argument("--text_offset", type=float, default=20)
|
|
pars.add_argument("--start_value", type=float, default=0)
|
|
pars.add_argument("--stop_value", type=float, default=10)
|
|
# Dummy
|
|
pars.add_argument("--tab")
|
|
|
|
def draw_text(self, textvalue, radius, angular_position, text_size, parent):
|
|
# Create text element
|
|
text = etree.Element(inkex.addNS('text','svg'))
|
|
text.text = textvalue
|
|
|
|
# Set text position to center of document.
|
|
text.set('x', str(self.x_offset + radius*cos(angular_position)))
|
|
text.set('y', str(self.y_offset + radius*sin(angular_position) + text_size/2))
|
|
|
|
# Center text horizontally with CSS style.
|
|
style = {
|
|
'text-align' : 'center',
|
|
'text-anchor': 'middle',
|
|
'alignment-baseline' : 'center',
|
|
'font-size' : str(text_size),
|
|
'vertical-align' : 'middle'
|
|
}
|
|
|
|
text.set('style', str(inkex.Style(style)))
|
|
parent.append(text)
|
|
def draw_knob_arc(self, radius, parent, angle, transform='' ):
|
|
|
|
start_point_angle = (angle - pi)/2.0
|
|
end_point_angle = pi - start_point_angle
|
|
|
|
style = { 'stroke' : '#000000',
|
|
'stroke-width' : str(self.options.linewidth),
|
|
'fill' : 'none' }
|
|
ell_attribs = {'style': str(inkex.Style(style)),
|
|
inkex.addNS('cx','sodipodi') :str(self.x_offset),
|
|
inkex.addNS('cy','sodipodi') :str(self.y_offset),
|
|
inkex.addNS('rx','sodipodi') :str(radius),
|
|
inkex.addNS('ry','sodipodi') :str(radius),
|
|
inkex.addNS('start','sodipodi') :str(end_point_angle),
|
|
inkex.addNS('end','sodipodi') :str(start_point_angle),
|
|
inkex.addNS('open','sodipodi') :'true', #all ellipse sectors we will draw are open
|
|
inkex.addNS('type','sodipodi') :'arc',
|
|
'transform' :transform
|
|
|
|
}
|
|
ell = etree.SubElement(parent, inkex.addNS('path','svg'), ell_attribs )
|
|
|
|
def draw_centering_circle(self, radius, parent):
|
|
|
|
style = { 'stroke' : '#000000',
|
|
'stroke-width' : '1',
|
|
'fill' : 'none' }
|
|
ell_attribs = {'style':str(inkex.Style(style)),
|
|
inkex.addNS('cx','sodipodi') :str(self.x_offset),
|
|
inkex.addNS('cy','sodipodi') :str(self.y_offset),
|
|
inkex.addNS('rx','sodipodi') :str(radius),
|
|
inkex.addNS('ry','sodipodi') :str(radius),
|
|
inkex.addNS('type','sodipodi') :'arc'
|
|
}
|
|
ell = etree.SubElement(parent, inkex.addNS('path','svg'), ell_attribs )
|
|
|
|
def draw_circle_mark(self, x_offset, y_offset, radius, mark_angle, mark_length, parent):
|
|
|
|
cx = x_offset + radius*cos(mark_angle)
|
|
cy = y_offset + radius*sin(mark_angle)
|
|
r = mark_length / 2.0
|
|
|
|
style = {
|
|
'stroke': '#000000',
|
|
'stroke-width':'0',
|
|
'fill': '#000000'
|
|
}
|
|
|
|
circ_attribs = {
|
|
'style':str(inkex.Style(style)),
|
|
'cx':str(cx),
|
|
'cy':str(cy),
|
|
'r':str(r)
|
|
}
|
|
circle = etree.SubElement(parent, inkex.addNS('circle','svg'), circ_attribs )
|
|
|
|
def draw_knob_line_mark(self, x_offset, y_offset, radius, mark_angle, mark_length, parent):
|
|
x1 = x_offset + radius*cos(mark_angle)
|
|
y1 = y_offset + radius*sin(mark_angle)
|
|
x2 = x_offset + (radius + mark_length)*cos(mark_angle)
|
|
y2 = y_offset + (radius + mark_length)*sin(mark_angle)
|
|
|
|
line_style = { 'stroke': '#000000',
|
|
'stroke-width': str(self.options.linewidth),
|
|
'fill': 'none'
|
|
}
|
|
|
|
line_attribs = {'style' : str(inkex.Style(line_style)),
|
|
inkex.addNS('label','inkscape') : "none",
|
|
'd' : 'M '+str(x1) +',' +
|
|
str(y1) +' L '+str(x2)
|
|
+','+str(y2) }
|
|
|
|
line = etree.SubElement(parent, inkex.addNS('path','svg'), line_attribs )
|
|
|
|
def draw_tick(self, radius, mark_angle, mark_size, parent):
|
|
if (self.options.style == 'marks_inwards') or (self.options.style == 'marks_outwards'):
|
|
self.draw_knob_line_mark(self.x_offset, self.y_offset, radius, mark_angle, mark_size, parent)
|
|
elif self.options.style == 'marks_circles':
|
|
self.draw_circle_mark(self.x_offset, self.y_offset, radius, mark_angle, mark_size, parent)
|
|
|
|
def effect(self):
|
|
parent = self.svg.get_current_layer()
|
|
radius = self.svg.unittouu(str(self.options.radius) + self.options.units)
|
|
self.x_offset = self.svg.unittouu(str(self.options.x) + self.options.units)
|
|
self.y_offset = self.svg.unittouu(str(self.options.y) + self.options.units)
|
|
angle = self.options.angle*pi/180.0
|
|
n_ticks = self.options.n_ticks
|
|
n_subticks = self.options.n_subticks
|
|
is_outer = True
|
|
if self.options.style == 'marks_inwards':
|
|
is_outer = False
|
|
|
|
tick_length = self.svg.unittouu(str(self.options.ticksize) + self.options.units)
|
|
subtick_length = self.svg.unittouu(str(self.options.subticksize) + self.options.units)
|
|
arc_radius = radius
|
|
|
|
|
|
# Labeling settings
|
|
start_num = self.options.start_value
|
|
end_num = self.options.stop_value
|
|
text_spacing = self.svg.unittouu(str(self.options.text_offset) + self.options.units)
|
|
text_size = self.svg.unittouu(str(self.options.text_size) + self.options.units)
|
|
|
|
if not is_outer:
|
|
subtick_radius = radius + tick_length - subtick_length
|
|
arc_radius = radius + tick_length
|
|
else:
|
|
subtick_radius = radius
|
|
arc_radius = radius
|
|
|
|
if self.options.draw_arc:
|
|
self.draw_knob_arc(arc_radius, parent, angle)
|
|
|
|
if self.options.draw_centering_circle:
|
|
self.draw_centering_circle(arc_radius + tick_length + text_size + text_spacing, parent)
|
|
|
|
if self.options.logarithmic_scale:
|
|
start_ticks_angle = 1.5*pi - 0.5*angle
|
|
for tick in range(n_ticks):
|
|
self.draw_tick(radius, start_ticks_angle + angle*log(tick+1)/log(n_ticks),
|
|
tick_length, parent)
|
|
|
|
if self.options.labels_enabled:
|
|
if self.options.rounding_level > 0:
|
|
tick_text = str(round(start_num +
|
|
float(tick) * (end_num - start_num) / (n_ticks - 1),
|
|
self.options.rounding_level))
|
|
else:
|
|
tick_text = str(int(start_num + float(tick) * (end_num - start_num) / (n_ticks - 1)))
|
|
|
|
self.draw_text(tick_text, radius + tick_length + text_spacing,
|
|
start_ticks_angle + angle*log(tick+1)/log(n_ticks),
|
|
text_size,
|
|
parent)
|
|
|
|
if tick == (n_ticks - 1):
|
|
break
|
|
|
|
for subtick in range(n_subticks):
|
|
self.draw_tick(subtick_radius, start_ticks_angle + angle*log(tick+1+(subtick+1)/(n_subticks+1))/log(n_ticks),
|
|
subtick_length, parent)
|
|
else:
|
|
ticks_delta = angle / (n_ticks - 1)
|
|
start_ticks_angle = 1.5*pi - 0.5*angle
|
|
|
|
for tick in range(n_ticks):
|
|
self.draw_tick(radius, start_ticks_angle + ticks_delta*tick,
|
|
tick_length, parent)
|
|
|
|
if self.options.labels_enabled:
|
|
if self.options.rounding_level > 0:
|
|
tick_text = str(round(start_num +
|
|
float(tick) * (end_num - start_num) / (n_ticks - 1),
|
|
self.options.rounding_level))
|
|
else:
|
|
tick_text = str(int(start_num + float(tick) * (end_num - start_num) / (n_ticks - 1)))
|
|
|
|
self.draw_text(tick_text, radius + tick_length + text_spacing,
|
|
start_ticks_angle + ticks_delta*tick,
|
|
text_size,
|
|
parent)
|
|
|
|
if tick == (n_ticks - 1):
|
|
break
|
|
|
|
subticks_delta = ticks_delta / (n_subticks + 1)
|
|
subtick_start_angle = start_ticks_angle + ticks_delta*tick + subticks_delta
|
|
for subtick in range(n_subticks):
|
|
self.draw_tick(subtick_radius, subtick_start_angle + subticks_delta*subtick,
|
|
subtick_length, parent)
|
|
|
|
if __name__ == '__main__':
|
|
e = KnobScale().run() |