56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
import mapnik
|
||
|
|
import sys
|
||
|
|
|
||
|
|
class MyText(mapnik.FormatingNode):
|
||
|
|
def __init__(self):
|
||
|
|
mapnik.FormatingNode.__init__(self)
|
||
|
|
self.expr = mapnik.Expression("[name]")
|
||
|
|
|
||
|
|
def apply(self, properties, feature, output):
|
||
|
|
colors = [mapnik.Color('red'),
|
||
|
|
mapnik.Color('green'),
|
||
|
|
mapnik.Color('blue')]
|
||
|
|
text = "Test" #self.expr.evaluate(feature)
|
||
|
|
i = 0
|
||
|
|
my_properties = properties #mapnik.CharProperties(properties)
|
||
|
|
for char in text:
|
||
|
|
my_properties.fill = colors[i % len(colors)]
|
||
|
|
output.append(my_properties, char)
|
||
|
|
i += 1
|
||
|
|
|
||
|
|
m = mapnik.Map(600,300)
|
||
|
|
m.background = mapnik.Color('white')
|
||
|
|
|
||
|
|
text = mapnik.TextSymbolizer()
|
||
|
|
text.face_name = 'DejaVu Sans Book'
|
||
|
|
|
||
|
|
point = mapnik.PointSymbolizer()
|
||
|
|
|
||
|
|
rule = mapnik.Rule()
|
||
|
|
rule.symbols.append(text)
|
||
|
|
rule.symbols.append(point)
|
||
|
|
|
||
|
|
style = mapnik.Style()
|
||
|
|
style.rules.append(rule)
|
||
|
|
|
||
|
|
m.append_style('Style', style)
|
||
|
|
|
||
|
|
|
||
|
|
layer = mapnik.Layer('Layer')
|
||
|
|
layer.datasource = mapnik.Shapefile(file="points.shp")
|
||
|
|
layer.styles.append('Style')
|
||
|
|
m.layers.append(layer)
|
||
|
|
|
||
|
|
m.zoom_all()
|
||
|
|
|
||
|
|
|
||
|
|
format_trees = [
|
||
|
|
('TextNode', mapnik.FormatingTextNode(mapnik.Expression("[name]"))),
|
||
|
|
('MyText', MyText())
|
||
|
|
]
|
||
|
|
|
||
|
|
for format_tree in format_trees:
|
||
|
|
text.placements.defaults.format_tree = format_tree[1]
|
||
|
|
mapnik.render_to_file(m, 'python-%s.png' % format_tree[0], 'png')
|