Ajoutez des fichiers projet.

venv/Lib/site-packages/django/contrib/gis/admin/widgets.py

@@ -0,0 +1,117 @@
+import logging
+
+from django.contrib.gis.gdal import GDALException
+from django.contrib.gis.geos import GEOSException, GEOSGeometry
+from django.forms.widgets import Textarea
+from django.utils import translation
+
+# Creating a template context that contains Django settings
+# values needed by admin map templates.
+geo_context = {'LANGUAGE_BIDI': translation.get_language_bidi()}
+logger = logging.getLogger('django.contrib.gis')
+
+
+class OpenLayersWidget(Textarea):
+    """
+    Render an OpenLayers map using the WKT of the geometry.
+    """
+    def get_context(self, name, value, attrs):
+        # Update the template parameters with any attributes passed in.
+        if attrs:
+            self.params.update(attrs)
+            self.params['editable'] = self.params['modifiable']
+        else:
+            self.params['editable'] = True
+
+        # Defaulting the WKT value to a blank string -- this
+        # will be tested in the JavaScript and the appropriate
+        # interface will be constructed.
+        self.params['wkt'] = ''
+
+        # If a string reaches here (via a validation error on another
+        # field) then just reconstruct the Geometry.
+        if value and isinstance(value, str):
+            try:
+                value = GEOSGeometry(value)
+            except (GEOSException, ValueError) as err:
+                logger.error("Error creating geometry from value '%s' (%s)", value, err)
+                value = None
+
+        if (value and value.geom_type.upper() != self.geom_type and
+                self.geom_type != 'GEOMETRY'):
+            value = None
+
+        # Constructing the dictionary of the map options.
+        self.params['map_options'] = self.map_options()
+
+        # Constructing the JavaScript module name using the name of
+        # the GeometryField (passed in via the `attrs` keyword).
+        # Use the 'name' attr for the field name (rather than 'field')
+        self.params['name'] = name
+        # note: we must switch out dashes for underscores since js
+        # functions are created using the module variable
+        js_safe_name = self.params['name'].replace('-', '_')
+        self.params['module'] = 'geodjango_%s' % js_safe_name
+
+        if value:
+            # Transforming the geometry to the projection used on the
+            # OpenLayers map.
+            srid = self.params['srid']
+            if value.srid != srid:
+                try:
+                    ogr = value.ogr
+                    ogr.transform(srid)
+                    wkt = ogr.wkt
+                except GDALException as err:
+                    logger.error(
+                        "Error transforming geometry from srid '%s' to srid '%s' (%s)",
+                        value.srid, srid, err
+                    )
+                    wkt = ''
+            else:
+                wkt = value.wkt
+
+            # Setting the parameter WKT with that of the transformed
+            # geometry.
+            self.params['wkt'] = wkt
+
+        self.params.update(geo_context)
+        return self.params
+
+    def map_options(self):
+        """Build the map options hash for the OpenLayers template."""
+        # JavaScript construction utilities for the Bounds and Projection.
+        def ol_bounds(extent):
+            return 'new OpenLayers.Bounds(%s)' % extent
+
+        def ol_projection(srid):
+            return 'new OpenLayers.Projection("EPSG:%s")' % srid
+
+        # An array of the parameter name, the name of their OpenLayers
+        # counterpart, and the type of variable they are.
+        map_types = [('srid', 'projection', 'srid'),
+                     ('display_srid', 'displayProjection', 'srid'),
+                     ('units', 'units', str),
+                     ('max_resolution', 'maxResolution', float),
+                     ('max_extent', 'maxExtent', 'bounds'),
+                     ('num_zoom', 'numZoomLevels', int),
+                     ('max_zoom', 'maxZoomLevels', int),
+                     ('min_zoom', 'minZoomLevel', int),
+                     ]
+
+        # Building the map options hash.
+        map_options = {}
+        for param_name, js_name, option_type in map_types:
+            if self.params.get(param_name, False):
+                if option_type == 'srid':
+                    value = ol_projection(self.params[param_name])
+                elif option_type == 'bounds':
+                    value = ol_bounds(self.params[param_name])
+                elif option_type in (float, int):
+                    value = self.params[param_name]
+                elif option_type in (str,):
+                    value = '"%s"' % self.params[param_name]
+                else:
+                    raise TypeError
+                map_options[js_name] = value
+        return map_options