author | Sverre Rabbelier <srabbelier@gmail.com> |
Sun, 25 Jan 2009 16:29:36 +0000 | |
changeset 988 | e35b3d98d469 |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
323
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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from django.conf import settings |
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from django.contrib.admin import ModelAdmin |
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from django.contrib.gis.admin.widgets import OpenLayersWidget |
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from django.contrib.gis.gdal import OGRGeomType |
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from django.contrib.gis.db import models |
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parents:
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|
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7 |
class GeoModelAdmin(ModelAdmin): |
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""" |
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9 |
The administration options class for Geographic models. Map settings |
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parents:
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10 |
may be overloaded from their defaults to create custom maps. |
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parents:
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11 |
""" |
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12 |
# The default map settings that may be overloaded -- still subject |
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13 |
# to API changes. |
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14 |
default_lon = 0 |
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default_lat = 0 |
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default_zoom = 4 |
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17 |
display_wkt = False |
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display_srid = False |
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19 |
extra_js = [] |
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num_zoom = 18 |
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max_zoom = False |
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min_zoom = False |
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units = False |
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max_resolution = False |
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max_extent = False |
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modifiable = True |
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mouse_position = True |
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scale_text = True |
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layerswitcher = True |
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scrollable = True |
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admin_media_prefix = settings.ADMIN_MEDIA_PREFIX |
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map_width = 600 |
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map_height = 400 |
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map_srid = 4326 |
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map_template = 'gis/admin/openlayers.html' |
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openlayers_url = 'http://openlayers.org/api/2.6/OpenLayers.js' |
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wms_url = 'http://labs.metacarta.com/wms/vmap0' |
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wms_layer = 'basic' |
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wms_name = 'OpenLayers WMS' |
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debug = False |
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widget = OpenLayersWidget |
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|
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def _media(self): |
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44 |
"Injects OpenLayers JavaScript into the admin." |
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media = super(GeoModelAdmin, self)._media() |
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media.add_js([self.openlayers_url]) |
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media.add_js(self.extra_js) |
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return media |
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media = property(_media) |
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def formfield_for_dbfield(self, db_field, **kwargs): |
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""" |
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53 |
Overloaded from ModelAdmin so that an OpenLayersWidget is used |
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for viewing/editing GeometryFields. |
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""" |
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if isinstance(db_field, models.GeometryField): |
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# Setting the widget with the newly defined widget. |
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kwargs['widget'] = self.get_map_widget(db_field) |
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return db_field.formfield(**kwargs) |
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else: |
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return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, **kwargs) |
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|
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def get_map_widget(self, db_field): |
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""" |
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Returns a subclass of the OpenLayersWidget (or whatever was specified |
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in the `widget` attribute) using the settings from the attributes set |
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in this class. |
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""" |
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is_collection = db_field._geom in ('MULTIPOINT', 'MULTILINESTRING', 'MULTIPOLYGON', 'GEOMETRYCOLLECTION') |
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if is_collection: |
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if db_field._geom == 'GEOMETRYCOLLECTION': collection_type = 'Any' |
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else: collection_type = OGRGeomType(db_field._geom.replace('MULTI', '')) |
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else: |
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collection_type = 'None' |
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|
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class OLMap(self.widget): |
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template = self.map_template |
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geom_type = db_field._geom |
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params = {'admin_media_prefix' : self.admin_media_prefix, |
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'default_lon' : self.default_lon, |
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'default_lat' : self.default_lat, |
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'default_zoom' : self.default_zoom, |
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'display_wkt' : self.debug or self.display_wkt, |
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'geom_type' : OGRGeomType(db_field._geom), |
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'field_name' : db_field.name, |
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'is_collection' : is_collection, |
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'scrollable' : self.scrollable, |
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'layerswitcher' : self.layerswitcher, |
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'collection_type' : collection_type, |
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'is_linestring' : db_field._geom in ('LINESTRING', 'MULTILINESTRING'), |
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'is_polygon' : db_field._geom in ('POLYGON', 'MULTIPOLYGON'), |
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'is_point' : db_field._geom in ('POINT', 'MULTIPOINT'), |
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'num_zoom' : self.num_zoom, |
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'max_zoom' : self.max_zoom, |
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'min_zoom' : self.min_zoom, |
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'units' : self.units, #likely shoud get from object |
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'max_resolution' : self.max_resolution, |
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'max_extent' : self.max_extent, |
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'modifiable' : self.modifiable, |
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'mouse_position' : self.mouse_position, |
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'scale_text' : self.scale_text, |
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'map_width' : self.map_width, |
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103 |
'map_height' : self.map_height, |
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104 |
'srid' : self.map_srid, |
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105 |
'display_srid' : self.display_srid, |
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106 |
'wms_url' : self.wms_url, |
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107 |
'wms_layer' : self.wms_layer, |
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108 |
'wms_name' : self.wms_name, |
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109 |
'debug' : self.debug, |
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110 |
} |
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111 |
return OLMap |
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112 |
|
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113 |
# Using the Beta OSM in the admin requires the following: |
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114 |
# (1) The Google Maps Mercator projection needs to be added |
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115 |
# to your `spatial_ref_sys` table. You'll need at least GDAL 1.5: |
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116 |
# >>> from django.contrib.gis.gdal import SpatialReference |
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117 |
# >>> from django.contrib.gis.utils import add_postgis_srs |
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118 |
# >>> add_postgis_srs(SpatialReference(900913)) # Adding the Google Projection |
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119 |
from django.contrib.gis import gdal |
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120 |
if gdal.HAS_GDAL: |
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121 |
class OSMGeoAdmin(GeoModelAdmin): |
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122 |
map_template = 'gis/admin/osm.html' |
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123 |
extra_js = ['http://openstreetmap.org/openlayers/OpenStreetMap.js'] |
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124 |
num_zoom = 20 |
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125 |
map_srid = 900913 |
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126 |
max_extent = '-20037508,-20037508,20037508,20037508' |
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127 |
max_resolution = 156543.0339 |
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128 |
units = 'm' |