cairotest.py

import cairo
from parchmint import Device
import json


PT_TO_UM = 1/352.778

f = open("cariotest2.json", "r")

text = f.read()

f.close()

alljson = json.loads(text)

d = Device(alljson)

xspan = d.params.get_param("xspan")
yspan = d.params.get_param("yspan")

print(len(d.components))
print(len(d.connections))

surface = cairo.SVGSurface('test.svg', xspan * PT_TO_UM, yspan * PT_TO_UM)
ctx = cairo.Context(surface)
ctx.scale(PT_TO_UM, PT_TO_UM)


for component in d.components:
    xpos = component.params.get_param('position')[0]
    ypos = component.params.get_param('position')[1]

    # Printing
    ctx.rectangle(xpos, ypos, component.xspan, component.yspan)
    ctx.fill()


for connection in d.connections:
    waypoints = connection.params.get_param("wayPoints")
    channelwidth = connection.params.get_param("channelWidth")
    for i in range(len(waypoints)-1):
        waypoint = waypoints[i]
        next_waypoint = waypoints[i+1]
        ctx.move_to(waypoint[0], waypoint[1])
        ctx.line_to(next_waypoint[0], next_waypoint[1])
        ctx.set_line_width(channelwidth/2)
        ctx.stroke()

surface.finish()