web/views/igeocodable.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 14 Sep 2010 08:48:44 +0200
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child 6864 ea95004494a2
permissions -rw-r--r--
[schema] mark CWUniqueTogetherConstraint and its relations as schema entity/relations
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""Specific views for entities implementing IGeocodable"""
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__docformat__ = "restructuredtext en"
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from cubicweb.interfaces import IGeocodable
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from cubicweb.view import EntityView, EntityAdapter, implements_adapter_compat
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from cubicweb.selectors import implements, adaptable
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from cubicweb.utils import json_dumps
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class IGeocodableAdapter(EntityAdapter):
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    """interface required by geocoding views such as gmap-view"""
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    __regid__ = 'IGeocodable'
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    __select__ = implements(IGeocodable, warn=False) # XXX for bw compat, should be abstract
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    @property
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    @implements_adapter_compat('IGeocodable')
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    def latitude(self):
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        """returns the latitude of the entity"""
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        raise NotImplementedError
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    @property
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    @implements_adapter_compat('IGeocodable')
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    def longitude(self):
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        """returns the longitude of the entity"""
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        raise NotImplementedError
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    @implements_adapter_compat('IGeocodable')
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    def marker_icon(self):
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        """returns the icon that should be used as the marker.
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        an icon is defined by a 4-uple:
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          (icon._url, icon.size,  icon.iconAnchor, icon.shadow)
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        """
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        return (self._cw.uiprops['GMARKER_ICON'], (20, 34), (4, 34), None)
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class GeocodingJsonView(EntityView):
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    __regid__ = 'geocoding-json'
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    __select__ = adaptable('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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        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 = []
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        for entity in self.cw_rset.entities():
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            igeocodable = entity.cw_adapt_to('IGeocodable')
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            # remove entities that don't define latitude and longitude
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            if not (igeocodable.latitude and igeocodable.longitude):
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                continue
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            markers.append(self.build_marker_data(entity, igeocodable,
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                                                  extraparams))
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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(json_dumps(geodata))
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    def build_marker_data(self, entity, igeocodable, extraparams):
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        return {'latitude': igeocodable.latitude,
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                'longitude': igeocodable.longitude,
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                'icon': igeocodable.marker_icon(),
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                'title': entity.dc_long_title(),
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                'bubbleUrl': entity.absolute_url(
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                    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__ = adaptable('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__ = adaptable('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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        self._cw.add_js('http://maps.google.com/maps?sensor=false&file=api&v=2&key=%s'
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                        % gmap_key, 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>'
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               % (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>')