author | Lennard de Rijk <ljvderijk@gmail.com> |
Fri, 16 Jan 2009 17:52:42 +0000 | |
changeset 815 | 7b8c65531fbd |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
1 |
from django.contrib.gis.gdal import OGRException |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2 |
from django.contrib.gis.geos import GEOSGeometry, GEOSException |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
3 |
from django.forms.widgets import Textarea |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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4 |
from django.template.loader import render_to_string |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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5 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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6 |
class OpenLayersWidget(Textarea): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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7 |
""" |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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8 |
Renders an OpenLayers map using the WKT of the geometry. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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9 |
""" |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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10 |
def render(self, name, value, attrs=None): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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11 |
# Update the template parameters with any attributes passed in. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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12 |
if attrs: self.params.update(attrs) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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13 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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14 |
# Defaulting the WKT value to a blank string -- this |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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15 |
# will be tested in the JavaScript and the appropriate |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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16 |
# interfaace will be constructed. |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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17 |
self.params['wkt'] = '' |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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18 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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19 |
# If a string reaches here (via a validation error on another |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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20 |
# field) then just reconstruct the Geometry. |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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21 |
if isinstance(value, basestring): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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22 |
try: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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23 |
value = GEOSGeometry(value) |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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24 |
except (GEOSException, ValueError): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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25 |
value = None |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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26 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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27 |
if value and value.geom_type.upper() != self.geom_type: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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28 |
value = None |
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Load ../vendor/django into trunk/app/django.
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parents:
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29 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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30 |
# Constructing the dictionary of the map options. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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31 |
self.params['map_options'] = self.map_options() |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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32 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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33 |
# Constructing the JavaScript module name using the ID of |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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34 |
# the GeometryField (passed in via the `attrs` keyword). |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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35 |
self.params['module'] = 'geodjango_%s' % self.params['field_name'] |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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36 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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37 |
if value: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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38 |
# Transforming the geometry to the projection used on the |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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39 |
# OpenLayers map. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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40 |
srid = self.params['srid'] |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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41 |
if value.srid != srid: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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42 |
try: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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43 |
value.transform(srid) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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44 |
wkt = value.wkt |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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45 |
except OGRException: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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46 |
wkt = '' |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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47 |
else: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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48 |
wkt = value.wkt |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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49 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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50 |
# Setting the parameter WKT with that of the transformed |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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51 |
# geometry. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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52 |
self.params['wkt'] = wkt |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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53 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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54 |
return render_to_string(self.template, self.params) |
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parents:
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55 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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56 |
def map_options(self): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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57 |
"Builds the map options hash for the OpenLayers template." |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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58 |
|
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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59 |
# JavaScript construction utilities for the Bounds and Projection. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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60 |
def ol_bounds(extent): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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61 |
return 'new OpenLayers.Bounds(%s)' % str(extent) |
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parents:
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62 |
def ol_projection(srid): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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63 |
return 'new OpenLayers.Projection("EPSG:%s")' % srid |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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64 |
|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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65 |
# An array of the parameter name, the name of their OpenLayers |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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66 |
# counterpart, and the type of variable they are. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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67 |
map_types = [('srid', 'projection', 'srid'), |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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68 |
('display_srid', 'displayProjection', 'srid'), |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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69 |
('units', 'units', str), |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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70 |
('max_resolution', 'maxResolution', float), |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
71 |
('max_extent', 'maxExtent', 'bounds'), |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
72 |
('num_zoom', 'numZoomLevels', int), |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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73 |
('max_zoom', 'maxZoomLevels', int), |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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74 |
('min_zoom', 'minZoomLevel', int), |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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75 |
] |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
76 |
|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
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77 |
# Building the map options hash. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
78 |
map_options = {} |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
79 |
for param_name, js_name, option_type in map_types: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
80 |
if self.params.get(param_name, False): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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81 |
if option_type == 'srid': |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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82 |
value = ol_projection(self.params[param_name]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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83 |
elif option_type == 'bounds': |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
84 |
value = ol_bounds(self.params[param_name]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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85 |
elif option_type in (float, int): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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86 |
value = self.params[param_name] |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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87 |
elif option_type in (str,): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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88 |
value = '"%s"' % self.params[param_name] |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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89 |
else: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
90 |
raise TypeError |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
91 |
map_options[js_name] = value |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
92 |
return map_options |