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Code Issues 32 Releases Wiki Activity

gis: Fixed #6746 by marking safe GoogleMap internal XHTML/JavaScript; added support for GPolygon and GPolyline overlays via the polygons and polylines keywords; the zoom keyword may now take a geometry for automatic zoom level determination; *.pyc files are now ignored in django.contrib.gis modules.

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git-svn-id: http://code.djangoproject.com/svn/django/branches/gis@7213 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Justin Bronn 2008-03-10 20:45:51 +00:00
parent 22e016ff6c
commit ae0e583510
5 changed files with 200 additions and 54 deletions
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7
django/contrib/gis/maps/google/__init__.py
View File

@ -19,7 +19,7 @@
{{ google.scripts }}
</head>
{{ google.body }}
<div id="{{ google.dom_id }}"></div>
<div id="{{ google.dom_id }}" style="width:600px;height:400px;"></div>
</body>
</html>
@ -47,7 +47,7 @@
body tag to load the generated javascript. By default, returns:
<body onload="gmap_load()" onunload="GUnload()">
- The `id` property returns the DOM id for the map. Defaults to "map".
- The `dom_id` property returns the DOM id for the map. Defaults to "map".
The following attributes may be set or customized in your local settings:
* GOOGLE_MAPS_API_KEY: String of your Google Maps API key. These are tied to
@ -56,5 +56,6 @@
* GOOGLE_MAPS_URL (optional): Must have a substitution ('%s') for the API
version.
"""
from django.contrib.gis.maps.google.gmap import GoogleMap
from django.contrib.gis.maps.google.gmap import GoogleMap, GZOOM
from django.contrib.gis.maps.google.overlays import GPolygon, GPolyline
from django.contrib.gis.maps.google.zoom import GoogleZoom

118
django/contrib/gis/maps/google/gmap.py
View File

@ -1,24 +1,32 @@
from django.conf import settings
from django.contrib.gis import geos
from django.template.loader import render_to_string
from django.utils.safestring import mark_safe
# Declaring the GoogleMapException prior to getting the
# default `GZOOM` GoogleZoom instance.
class GoogleMapException(Exception): pass
from django.contrib.gis.maps.google.overlays import GPolygon, GPolyline
from django.contrib.gis.maps.google.zoom import GoogleZoom
GZOOM = GoogleZoom()
# The default Google Maps URL (for the API javascript)
# TODO: Internationalize for Japan, UK, etc.
GOOGLE_MAPS_URL='http://maps.google.com/maps?file=api&amp;v=%s&amp;key='
class GoogleMapException(Exception): pass
class GoogleMap(object):
"A class for generating Google Maps javascript."
"A class for generating Google Maps JavaScript."
# String constants
onunload = 'onunload="GUnload()"' # Cleans up after Google Maps
vml_css = 'v\:* {behavior:url(#default#VML);}' # CSS for IE VML
xmlns = 'xmlns:v="urn:schemas-microsoft-com:vml"' # XML Namespace (for IE VML).
onunload = mark_safe('onunload="GUnload()"') # Cleans up after Google Maps
vml_css = mark_safe('v\:* {behavior:url(#default#VML);}') # CSS for IE VML
xmlns = mark_safe('xmlns:v="urn:schemas-microsoft-com:vml"') # XML Namespace (for IE VML).
def __init__(self, key=None, api_url=None, version=None,
center_lat=0.0, center_lon=0.0, zoom=1,
dom_id='map', load_func='gmap_load',
kml_urls=[], template='gis/google/js/google-map.js',
center=None, center_lat=0.0, center_lon=0.0,
zoom=None, dom_id='map', load_func='gmap_load',
kml_urls=[], polygons=[], polylines=[],
template='gis/google/js/google-map.js',
extra_context={}):
# The Google Maps API Key defined in the settings will be used
@ -26,77 +34,109 @@ class GoogleMap(object):
# _required_.
if not key:
try:
self._key = settings.GOOGLE_MAPS_API_KEY
self.key = settings.GOOGLE_MAPS_API_KEY
except AttributeError:
raise GoogleMapException, 'Google Maps API Key not found (try adding GOOGLE_MAPS_API_KEY to your settings).'
raise GoogleMapException('Google Maps API Key not found (try adding GOOGLE_MAPS_API_KEY to your settings).')
else:
self._key = key
self.key = key
# Getting the Google Maps API version, defaults to using the latest ("2.x"),
# this is not necessarily the most stable.
if not version:
try:
self._version = settings.GOOGLE_MAPS_API_VERSION
except AttributeError:
self._version = '2.x'
self.version = getattr(settings, 'GOOGLE_MAPS_API_VERSION', '2.x')
else:
self._version = version
self.version = version
# Can specify the API URL in the `api_url` keyword.
if not api_url:
try:
self._url = settings.GOOGLE_MAPS_URL % self._version
except AttributeError:
self._url = GOOGLE_MAPS_URL % self._version
self.api_url = mark_safe(getattr(settings, 'GOOGLE_MAPS_URL', GOOGLE_MAPS_URL) % self.version)
else:
self._url = api_url
self.api_url = api_url
# Setting the DOM id of the map, the center lat/lon, the load function,
# and the zoom.
# Setting the DOM id of the map, the load function, the JavaScript
# template, and the KML URLs array.
self.dom_id = dom_id
self.center_lat = center_lat
self.center_lon = center_lon
self.load_func = load_func
self.template = template
self.kml_urls = kml_urls
# Does the user want any GPolygon or GPolyline overlays?
self.polygons, self.polylines = [], []
if polygons:
for poly in polygons:
if isinstance(poly, GPolygon):
self.polygons.append(poly)
else:
self.polygons.append(GPolygon(poly))
if polylines:
for pline in polylines:
if isinstance(pline, GPolyline):
self.polylines.append(pline)
else:
self.polylines.append(GPolyline(pline))
# Automatically determining the zoom level if there are
# GPolygon and/or GPolyline overlays.
if (self.polygons or self.polylines) and zoom is None:
envelopes = [p.envelope for p in self.polygons]
envelopes.extend([p.envelope for p in self.polylines])
# Creating a MultiPolygon of all the envelopes, this will
# be used in determining the zoom level.
zoom = geos.MultiPolygon(envelopes)
zoom.srid = 4326
# If a GEOSGeometry object is passed in for the `zoom` keyword
# argument, then try to automatically determine an appropriate
# zoom level.
if isinstance(zoom, geos.GEOSGeometry):
self.zoom = GZOOM.get_zoom(zoom)
else:
self.zoom = zoom
# The map center coordinate -- the `center_lon` and `center_lat` keyword
# are deprecated.
if not center:
center = (center_lon, center_lat)
self.center = center
# Setting the parameters for the javascript template.
params = {'center_lat' : center_lat,
'center_lon' : center_lon,
'dom_id' : dom_id,
'kml_urls' : kml_urls,
'load_func' : load_func,
'zoom' : zoom,
params = {'center' : self.center,
'dom_id' : self.dom_id,
'kml_urls' : self.kml_urls,
'load_func' : self.load_func,
'zoom' : self.zoom,
'polygons' : self.polygons,
'polylines' : self.polylines,
}
params.update(extra_context)
self.js = render_to_string(template, params)
self.js = render_to_string(self.template, params)
@property
def body(self):
"Returns HTML body tag for loading and unloading Google Maps javascript."
return '<body %s %s>' % (self.onload, self.onunload)
return mark_safe('<body %s %s>' % (self.onload, self.onunload))
@property
def onload(self):
"Returns the `onload` HTML <body> attribute."
return 'onload="%s()"' % self.load_func
return mark_safe('onload="%s()"' % self.load_func)
@property
def api_script(self):
"Returns the <script> tag for the Google Maps API javascript."
return '<script src="%s%s" type="text/javascript"></script>' % (self._url, self._key)
return mark_safe('<script src="%s%s" type="text/javascript"></script>' % (self.api_url, self.key))
@property
def scripts(self):
"Returns all <script></script> tags required for Google Maps JavaScript."
return '%s\n <script type="text/javascript">\n//<![CDATA[\n%s//]]>\n </script>' % (self.api_script, self.js)
return mark_safe('%s\n <script type="text/javascript">\n//<![CDATA[\n%s//]]>\n </script>' % (self.api_script, self.js))
@property
def style(self):
"Returns additional CSS styling needed for Google Maps on IE."
return '<style type="text/css">%s</style>' % self.vml_css
return mark_safe('<style type="text/css">%s</style>' % self.vml_css)
@property
def xhtml(self):
"Returns XHTML information needed for IE VML overlays."
return '<html xmlns="http://www.w3.org/1999/xhtml" %s>' % self.xmlns
return mark_safe('<html xmlns="http://www.w3.org/1999/xhtml" %s>' % self.xmlns)

101
django/contrib/gis/maps/google/overlays.py Normal file
View File

@ -0,0 +1,101 @@
from django.contrib.gis.geos import LineString, LinearRing, Polygon
from django.utils.safestring import mark_safe
class GOverlayBase(object):
def latlng_from_coords(self, coords):
return '[%s]' % ','.join(['new GLatLng(%s,%s)' % (y, x) for x, y in coords])
def __unicode__(self):
"The string representation is the JavaScript API call."
return mark_safe('%s(%s)' % (self.__class__.__name__, self.js_params))
class GPolygon(GOverlayBase):
"""
A Python wrapper for the Google GPolygon object. For more information
please see the Google Maps API Reference:
http://code.google.com/apis/maps/documentation/reference.html#GPolygon
"""
def __init__(self, poly,
stroke_color='#0000ff', stroke_weight=2, stroke_opacity=1,
fill_color='#0000ff', fill_opacity=0.4):
"""
The GPolygon object initializes on a GEOS Polygon. Please note that
this will not depict Polygons with internal rings.
Keyword Options:
stroke_color:
The color of the polygon outline. Defaults to '#0000ff' (blue).
stroke_weight:
The width of the polygon outline, in pixels. Defaults to 2.
stroke_opacity:
The opacity of the polygon outline, between 0 and 1. Defaults to 1.
fill_color:
The color of the polygon fill. Defaults to '#0000ff' (blue).
fill_opacity:
The opacity of the polygon fill. Defaults to 0.4.
"""
# TODO: Take other types of geometries.
if not isinstance(poly, Polygon):
raise TypeError('GPolygon may only initialize on GEOS Polygons.')
# Getting the envelope of the input polygon (used for automatically
# determining the zoom level).
self.envelope = poly.envelope
# Translating the coordinates into a JavaScript array of
# Google `GLatLng` objects.
self.points = self.latlng_from_coords(poly.shell.coords)
# Stroke settings.
self.stroke_color, self.stroke_opacity, self.stroke_weight = stroke_color, stroke_opacity, stroke_weight
# Fill settings.
self.fill_color, self.fill_opacity = fill_color, fill_opacity
@property
def js_params(self):
return '%s, "%s", %s, %s, "%s", %s' % (self.points, self.stroke_color, self.stroke_weight, self.stroke_opacity,
self.fill_color, self.fill_opacity)
class GPolyline(GOverlayBase):
"""
A Python wrapper for the Google GPolyline object. For more information
please see the Google Maps API Reference:
http://code.google.com/apis/maps/documentation/reference.html#GPolyline
"""
def __init__(self, geom, color='#0000ff', weight=2, opacity=1):
"""
The GPolyline object may initialize on GEOS LineStirng, LinearRing,
and Polygon objects (internal rings not supported).
Keyword Options:
color:
The color to use for the polyline. Defaults to '#0000ff' (blue).
weight:
The width of the polyline, in pixels. Defaults to 2.
opacity:
The opacity of the polyline, between 0 and 1. Defaults to 1.
"""
if isinstance(geom, (LineString, LinearRing)):
self.latlngs = self.latlng_from_coords(geom.coords)
elif isinstance(geom, Polygon):
self.latlngs = self.latlng_from_coords(geom.shell.coords)
else:
raise TypeError('GPolyline may only initialize on GEOS LineString, LinearRing, and/or Polygon geometries.')
# Getting the envelope for automatic zoom determination.
self.envelope = geom.envelope
self.color, self.weight, self.opacity = color, weight, opacity
@property
def js_params(self):
return '%s, "%s", %s, %s' % (self.latlngs, self.color, self.weight, self.opacity)

10
django/contrib/gis/maps/google/zoom.py
View File

@ -99,7 +99,7 @@ class GoogleZoom(object):
def pixel_to_lonlat(self, px, zoom):
"Converts a pixel to a longitude, latitude pair at the given zoom level."
if len(px) != 2:
raise TypeError, 'Pixel should be a sequence of two elements.'
raise TypeError('Pixel should be a sequence of two elements.')
# Getting the number of pixels for the given zoom level.
npix = self._npix[zoom]
@ -138,8 +138,8 @@ class GoogleZoom(object):
"Returns the optimal Zoom level for the given geometry."
# Checking the input type.
if not isinstance(geom, GEOSGeometry) and geom.srid == 4326:
raise TypeError, 'get_zoom() expects a GEOS Geometry with an SRID of 4326.'
if not isinstance(geom, GEOSGeometry) or geom.srid != 4326:
raise TypeError('get_zoom() expects a GEOS Geometry with an SRID of 4326.')
# Getting the envelope for the geometry, and its associated width, height
# and centroid.
@ -156,9 +156,9 @@ class GoogleZoom(object):
# zoom level.
if (env_w > tile_w) or (env_h > tile_h):
if z == 0:
raise GoogleMapException, \
'Geometry width and height should not exceed that of the Earth.'
raise GoogleMapException('Geometry width and height should not exceed that of the Earth.')
return z-1
# Otherwise, we've zoomed in to the max.
return self._nzoom-1

16
django/contrib/gis/templates/gis/google/js/google-map.js
View File

@ -1,16 +1,20 @@
{% block vars %}var map;{% for kml_url in kml_urls %}var kml{{ forloop.counter }};{% endfor %}{% endblock %}
{% autoescape off %}{% block vars %}var map;{% endblock %}
{% block functions %}{% endblock %}
{% block load %}function {{ load_func }}(){
if (GBrowserIsCompatible()) {
map = new GMap2(document.getElementById("{{ dom_id }}"));
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
map.setCenter(new GLatLng({{ center_lat }}, {{ center_lon }}), {{ zoom }});
{% for kml_url in kml_urls %}kml{{ forloop.counter }} = new GGeoXml("{{ kml_url }}");
{% block controls %}map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());{% endblock %}
map.setCenter(new GLatLng({{ center.1 }}, {{ center.0 }}), {{ zoom }});
{% for kml_url in kml_urls %}var kml{{ forloop.counter }} = new GGeoXml("{{ kml_url }}");
map.addOverlay(kml{{ forloop.counter }});{% endfor %}
{% for polygon in polygons %}var poly{{ forloop.counter }} = new {{ polygon }};
map.addOverlay(poly{{ forloop.counter }});{% endfor %}
{% for polyline in polylines %}var polyline{{ forloop.counter }} = new {{ polyline }};
map.addOverlay(polyline{{ forloop.counter }});{% endfor %}
{% block load_extra %}{% endblock %}
}else {
alert("Sorry, the Google Maps API is not compatible with this browser.");
}
}
{% endblock %}
{% endblock %}{% endautoescape %}