#!/usr/bin/python
# -*- coding: utf-8 -*-
"""An example of Buxus Microfila."""

import sys

import buxus
import buxcanvas

def main():
    f = buxus.open(sys.argv[1])
    viewport = f.bbox()
    canvas = buxcanvas.create(viewport)
    for i, way in enumerate(f.ways(viewport)):
        first = True
        for lat, long in way.nodes():
            if first:
                canvas.moveto(lat, long)
                first = False
            else:
                canvas.lineto(lat, long)
        canvas.setlinewidth(4 if way.tags.get('highway') == 'motorway' else 2)
        canvas.stroke()
        if i > 64:
            break

if __name__ == '__main__':
    main()