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#!/usr/bin/env python3
#coding:utf-8
# Author: mozman
# Purpose: svg example: inline stylesheets, css, viewbox, groups
# Created: 09.06.2012
# Copyright (C) 2012, Manfred Moitzi
# License: MIT License
import sys
from pathlib import Path
try:
import svgwrite
except ImportError:
sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
import svgwrite
if svgwrite.version < (1,0,1):
print("This script requires svgwrite 1.0.1 or newer for internal stylesheets.")
sys.exit()
BOARD_WIDTH = "10cm"
BOARD_HEIGHT = "10cm"
BOARD_SIZE = (BOARD_WIDTH, BOARD_HEIGHT)
CSS_STYLES = """
.background { fill: lavenderblush; }
.line { stroke: firebrick; stroke-width: .1mm; }
.blacksquare { fill: indigo; }
.whitesquare { fill: hotpink; }
"""
def draw_board(dwg):
def group(classname):
return dwg.add(dwg.g(class_=classname))
# setup element groups
lines = group("line")
white_squares = group("whitesquare")
black_squares = group("blacksquare")
# draw lines
for i in range(9):
y = i * 10
lines.add(dwg.line(start=(0, y), end=(80, y)))
x = i * 10
lines.add(dwg.line(start=(x, 0), end=(x, 80)))
# draw squares
for x in range(8):
for y in range(8):
xc = x * 10 + 1
yc = y * 10 + 1
square = dwg.rect(insert=(xc, yc), size=(8, 8))
(white_squares if (x+y) % 2 else black_squares).add(square)
def main():
dwg = svgwrite.Drawing('checkerboard.svg', size=BOARD_SIZE)
dwg.viewbox(0, 0, 80, 80)
# checkerboard has a size of 10cm x 10cm;
# defining a viewbox with the size of 80x80 means, that a length of 1
# is 10cm/80 == 0.125cm (which is for now the famous USER UNIT)
# but I don't have to care about it, I just draw 8x8 squares, each 10x10 USER-UNITS
# always use css for styling
dwg.defs.add(dwg.style(CSS_STYLES))
# set background
dwg.add(dwg.rect(size=('100%','100%'), class_='background'))
draw_board(dwg)
dwg.save()
if __name__== '__main__':
main()
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