Fixed #9204 -- Added `GIcon` overlay, allowing customization for icons of `GMarker` objects. Thanks to qingfeng for initial ticket/patch, and to prairiedogg for final implementation.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10021 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/gis/maps/google/__init__.py

@@ -57,5 +57,5 @@
       version.
 """
 from django.contrib.gis.maps.google.gmap import GoogleMap, GoogleMapSet
-from django.contrib.gis.maps.google.overlays import GEvent, GMarker, GPolygon, GPolyline
+from django.contrib.gis.maps.google.overlays import GEvent, GIcon, GMarker, GPolygon, GPolyline
 from django.contrib.gis.maps.google.zoom import GoogleZoom

django/contrib/gis/maps/google/gmap.py

@@ -4,7 +4,7 @@ from django.template.loader import render_to_string
 from django.utils.safestring import mark_safe
 
 class GoogleMapException(Exception): pass
-from django.contrib.gis.maps.google.overlays import GPolygon, GPolyline, GMarker
+from django.contrib.gis.maps.google.overlays import GPolygon, GPolyline, GMarker, GIcon
 
 # The default Google Maps URL (for the API javascript)
 # TODO: Internationalize for Japan, UK, etc.
@@ -20,9 +20,10 @@ class GoogleMap(object):
 
     def __init__(self, key=None, api_url=None, version=None,
                  center=None, zoom=None, dom_id='map',
-                 kml_urls=[], polygons=[], polylines=[], markers=[],
+                 kml_urls=[], polylines=None, polygons=None, markers=None,
                  template='gis/google/google-single.js',
-                 js_module='geodjango',extra_context={}):
+                 js_module='geodjango',
+                 extra_context={}):
 
         # The Google Maps API Key defined in the settings will be used
         # if not passed in as a parameter.  The use of an API key is
@@ -57,25 +58,21 @@ class GoogleMap(object):
         self.kml_urls = kml_urls
 
         # Does the user want any GMarker, GPolygon, and/or GPolyline overlays?
-        self.polygons, self.polylines, self.markers = [], [], []
+        overlay_info = [[GMarker, markers, 'markers'],
-        if markers:
+                        [GPolygon, polygons, 'polygons'],
-            for point in markers:
+                        [GPolyline, polylines, 'polylines']]
-                if isinstance(point, GMarker): 
+
-                    self.markers.append(point)
+        for overlay_class, overlay_list, varname in overlay_info:
+            setattr(self, varname, [])
+            if overlay_list:
+                for overlay in overlay_list:
+                    if isinstance(overlay, overlay_class):
+                        getattr(self, varname).append(overlay)
                     else:
-                    self.markers.append(GMarker(point))
+                        getattr(self, varname).append(overlay_class(overlay))
-        if polygons:
+
-            for poly in polygons:
+        # Pulling any icons from the markers.
-                if isinstance(poly, GPolygon): 
+        self.icons = [marker.icon for marker in self.markers if marker.icon]
-                    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))
 
         # If GMarker, GPolygons, and/or GPolylines are used the zoom will be
         # automatically calculated via the Google Maps API.  If both a zoom
@@ -105,6 +102,7 @@ class GoogleMap(object):
                   'zoom' : self.zoom,
                   'polygons' : self.polygons,
                   'polylines' : self.polylines,
+                  'icons': self.icons,
                   'markers' : self.markers,
                   }
         params.update(self.extra_context)
@@ -175,6 +173,11 @@ class GoogleMapSet(GoogleMap):
         else:
             self.maps = args
 
+        # Creating the icons sequence from every map in this set.
+        self.icons = []
+        for map in self.maps:
+            self.icons.extend(map.icons)
+
         # Generating DOM ids for each of the maps in the set.
         self.dom_ids = ['map%d' % i for i in xrange(len(self.maps))]
 
@@ -205,6 +208,7 @@ class GoogleMapSet(GoogleMap):
         params = {'js_module' : self.js_module,
                   'dom_ids' : self.dom_ids,
                   'load_map_js' : self.load_map_js(),
+                  'icons' : self.icons,
                   }
         params.update(self.extra_context)
         return render_to_string(self.template, params)

django/contrib/gis/maps/google/overlays.py

@@ -165,6 +165,72 @@ class GPolyline(GOverlayBase):
     def js_params(self):
         return '%s, "%s", %s, %s' % (self.latlngs, self.color, self.weight, self.opacity)
 
+
+class GIcon(object):
+    """
+    Creates a GIcon object to pass into a Gmarker object.
+
+    The keyword arguments map to instance attributes of the same name. These,
+    in turn, correspond to a subset of the attributes of the official GIcon
+    javascript object:
+
+    http://code.google.com/apis/maps/documentation/reference.html#GIcon
+
+    Because a Google map often uses several different icons, a name field has
+    been added to the required arguments.
+
+    Required Arguments:
+        varname:
+            A string which will become the basis for the js variable name of
+            the marker, for this reason, your code should assign a unique
+            name for each GIcon you instantiate, otherwise there will be
+            name space collisions in your javascript.
+
+    Keyword Options:
+        image:
+            The url of the image to be used as the icon on the map defaults
+            to 'G_DEFAULT_ICON'
+
+        iconsize:
+            a tuple representing the pixel size of the foreground (not the
+            shadow) image of the icon, in the format: (width, height) ex.:
+
+            GIcon('fast_food',
+                  image="/media/icon/star.png",
+                  iconsize=(15,10))
+
+            Would indicate your custom icon was 15px wide and 10px height.
+
+        shadow:
+            the url of the image of the icon's shadow
+
+        shadowsize:
+            a tuple representing the pixel size of the shadow image, format is
+            the same as ``iconsize``
+
+        iconanchor:
+            a tuple representing the pixel coordinate relative to the top left
+            corner of the icon image at which this icon is anchored to the map.
+            In (x, y) format.  x increases to the right in the Google Maps
+            coordinate system and y increases downwards in the Google Maps
+            coordinate system.)
+
+        infowindowanchor:
+            The pixel coordinate relative to the top left corner of the icon
+            image at which the info window is anchored to this icon.
+
+    """
+    def __init__(self, varname, image=None, iconsize=None,
+                 shadow=None, shadowsize=None, iconanchor=None,
+                 infowindowanchor=None):
+        self.varname = varname
+        self.image = image
+        self.iconsize = iconsize
+        self.shadow = shadow
+        self.shadowsize = shadowsize
+        self.iconanchor = iconanchor
+        self.infowindowanchor = infowindowanchor
+
 class GMarker(GOverlayBase):
     """
     A Python wrapper for the Google GMarker object.  For more information
@@ -184,7 +250,7 @@ class GMarker(GOverlayBase):
           return render_to_response('mytemplate.html',
                  {'google' : GoogleMap(markers=[marker])})
     """
-    def __init__(self, geom, title=None, draggable=False):
+    def __init__(self, geom, title=None, draggable=False, icon=None):
         """
         The GMarker object may initialize on GEOS Points or a parameter
         that may be instantiated into a GEOS point.  Keyword options map to
@@ -209,6 +275,7 @@ class GMarker(GOverlayBase):
         # TODO: Add support for more GMarkerOptions
         self.title = title
         self.draggable = draggable
+        self.icon = icon
         super(GMarker, self).__init__()
 
     def latlng_from_coords(self, coords):
@@ -217,6 +284,7 @@ class GMarker(GOverlayBase):
     def options(self):
         result = []
         if self.title: result.append('title: "%s"' % self.title)
+        if self.icon: result.append('icon: %s' % self.icon.varname)
         if self.draggable: result.append('draggable: true')
         return '{%s}' % ','.join(result)
 

django/contrib/gis/templates/gis/google/google-base.js

@@ -1,2 +1,7 @@
-{% block vars %}var geodjango = {};{% endblock %}
+{% block vars %}var geodjango = {};{% for icon in icons %} 
+var {{ icon.varname }} = new GIcon(G_DEFAULT_ICON); 
+{% if icon.image %}{{ icon.varname }}.image = "{{ icon.image }}";{% endif %}
+{% if icon.shadow %}{{ icon.varname }}.shadow = "{{ icon.shadow }}";{% endif %} {% if icon.shadowsize %}{{ icon.varname }}.shadowSize = new GSize({{ icon.shadowsize.0 }}, {{ icon.shadowsize.1 }});{% endif %}
+{% if icon.iconanchor %}{{ icon.varname }}.iconAnchor = new GPoint({{ icon.iconanchor.0 }}, {{ icon.iconanchor.1 }});{% endif %} {% if icon.iconsize %}{{ icon.varname }}.iconSize = new GSize({{ icon.iconsize.0 }}, {{ icon.iconsize.1 }});{% endif %}
+{% if icon.infowindowanchor %}{{ icon.varname }}.infoWindowAnchor = new GPoint({{ icon.infowindowanchor.0 }}, {{ icon.infowindowanchor.1 }});{% endif %}{% endfor %}{% endblock %}
 {% block functions %}{% endblock %}