#coding:utf-8
# Author: mozman
# Purpose: svg path element
# Created: 08.09.2010
# License: MIT License
from svgwrite.base import BaseElement
from svgwrite.utils import strlist
from svgwrite.mixins import Presentation, Markers, Transform
class Path(BaseElement, Transform, Presentation, Markers):
""" The <path> element represent the outline of a shape which can be filled,
stroked, used as a clipping path, or any combination of the three.
"""
elementname = 'path'
def __init__(self, d=None, **extra):
"""
:param `iterable` d: *coordinates*, *length* and *commands*
:param dict attribs: additional SVG attributes
:param extra: additional SVG attributes as keyword-arguments
"""
super(Path, self).__init__(**extra)
self.commands = []
self.push(d)
if self.debug:
self.validator.check_all_svg_attribute_values(self.elementname, self.attribs)
def push(self, *elements):
""" Push commands and coordinates onto the command stack.
:param `iterable` elements: *coordinates*, *length* and *commands*
"""
self.commands.extend(elements)
@staticmethod
def arc_flags(large_arc=True, angle_dir='+'):
large_arc_flag = int(large_arc)
sweep_flag = {'+': 1, '-': 0}[angle_dir]
return "%d,%d" % (large_arc_flag, sweep_flag)
def push_arc(self, target, rotation, r, large_arc=True, angle_dir='+', absolute=False):
""" Helper function for the elliptical-arc command.
see SVG-Reference: http://www.w3.org/TR/SVG11/paths.html#PathData
:param 2-tuple target: *coordinate* of the arc end point
:param number rotation: x-axis-rotation of the ellipse in degrees
:param number|2-tuple r: radii rx, ry when r is a *2-tuple* or rx=ry=r if r is a *number*
:param bool large_arc: draw the arc sweep of greater than or equal to 180 degrees (**large-arc-flag**)
:param angle_dir: ``'+|-'`` ``'+'`` means the arc will be drawn in a "positive-angle" direction (**sweep-flag**)
:param bool absolute: indicates that target *coordinates* are absolute else they are relative to the current point
"""
self.push({True: 'A', False: 'a'}[absolute])
if isinstance(r, (float, int)):
self.push(r, r)
else:
self.push(r)
self.push(rotation)
self.push(Path.arc_flags(large_arc, angle_dir))
self.push(target)
def get_xml(self):
""" Get the XML representation as `ElementTree` object.
:return: XML `ElementTree` of this object and all its subelements
"""
self.attribs['d'] = str(strlist(self.commands, ' '))
return super(Path, self).get_xml()
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