web/views/igeocodable.py
author Alexandre Fayolle <alexandre.fayolle@logilab.fr>
Wed, 07 Apr 2010 11:56:30 +0200
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"""Specific views for entities implementing IGeocodable
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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import simplejson
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from cubicweb.interfaces import IGeocodable
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from cubicweb.view import EntityView
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from cubicweb.selectors import implements
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class GeocodingJsonView(EntityView):
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    __regid__ = 'geocoding-json'
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    __select__ = implements(IGeocodable)
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    binary = True
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    templatable = False
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    content_type = 'application/json'
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    def call(self):
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        # remove entities that don't define latitude and longitude
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        self.cw_rset = self.cw_rset.filtered_rset(lambda e: e.latitude and e.longitude)
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        zoomlevel = self._cw.form.pop('zoomlevel', 8)
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        extraparams = self._cw.form.copy()
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        extraparams.pop('vid', None)
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        extraparams.pop('rql', None)
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        markers = [self.build_marker_data(rowidx, extraparams)
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                   for rowidx in xrange(len(self.cw_rset))]
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        center = {
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            'latitude': sum(marker['latitude'] for marker in markers) / len(markers),
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            'longitude': sum(marker['longitude'] for marker in markers) / len(markers),
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            }
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        geodata = {
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            'zoomlevel': int(zoomlevel),
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            'center': center,
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            'markers': markers,
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            }
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        self.w(simplejson.dumps(geodata))
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    def build_marker_data(self, row, extraparams):
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        entity = self.cw_rset.get_entity(row, 0)
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        icon = None
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        if hasattr(entity, 'marker_icon'):
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            icon = entity.marker_icon()
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        else:
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            icon = (self._cw.external_resource('GMARKER_ICON'), (20, 34), (4, 34), None)
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        return {'latitude': entity.latitude, 'longitude': entity.longitude,
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                'title': entity.dc_long_title(),
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                #icon defines : (icon._url, icon.size,  icon.iconAncho', icon.shadow)
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                'icon': icon,
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                'bubbleUrl': entity.absolute_url(vid='gmap-bubble', __notemplate=1, **extraparams),
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                }
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class GoogleMapBubbleView(EntityView):
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    __regid__ = 'gmap-bubble'
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    __select__ = implements(IGeocodable)
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    def cell_call(self, row, col):
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        entity = self.cw_rset.get_entity(row, col)
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        self.w(u'<div>%s</div>' % entity.view('oneline'))
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        # FIXME: we should call something like address-view if available
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class GoogleMapsView(EntityView):
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    __regid__ = 'gmap-view'
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    __select__ = implements(IGeocodable)
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    paginable = False
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    def call(self, gmap_key, width=400, height=400, uselabel=True, urlparams=None):
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        self._cw.demote_to_html()
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        # remove entities that don't define latitude and longitude
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        self.cw_rset = self.cw_rset.filtered_rset(lambda e: e.latitude and e.longitude)
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        self._cw.add_js('http://maps.google.com/maps?sensor=false&file=api&v=2&key=%s' % gmap_key,
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                        localfile=False)
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        self._cw.add_js( ('cubicweb.widgets.js', 'cubicweb.gmap.js', 'gmap.utility.labeledmarker.js') )
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        rql = self.cw_rset.printable_rql()
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        if urlparams is None:
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            loadurl = self._cw.build_url(rql=rql, vid='geocoding-json')
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        else:
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            loadurl = self._cw.build_url(rql=rql, vid='geocoding-json', **urlparams)
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        self.w(u'<div style="width: %spx; height: %spx;" class="widget gmap" '
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               u'cubicweb:wdgtype="GMapWidget" cubicweb:loadtype="auto" '
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               u'cubicweb:loadurl="%s" cubicweb:uselabel="%s"> </div>' % (width, height, loadurl, uselabel))
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class GoogeMapsLegend(EntityView):
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    __regid__ = 'gmap-legend'
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    def call(self):
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        self.w(u'<ol>')
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        for rowidx in xrange(len(self.cw_rset)):
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            self.w(u'<li>')
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            self.wview('listitem', self.cw_rset, row=rowidx, col=0)
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            self.w(u'</li>')
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        self.w(u'</ol>')