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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2008 Étienne Loks <etienne.loks_AT_peacefrogsDOTnet>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# See the file COPYING for details.
"""
Extra widgets and fields
"""
from django import forms
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext as _
from chimere import settings
from django.contrib.gis.db import models
URL_OSM_JS = ["http://www.openlayers.org/api/OpenLayers.js",
"http://www.openstreetmap.org/openlayers/OpenStreetMap.js"]
def getMapJS():
'''Variable initialization for drawing the map
'''
# projection, center and bounds definitions
js = u"var epsg_display_projection = new OpenLayers.Projection('EPSG:%d')\
;\n" % settings.EPSG_DISPLAY_PROJECTION
js += u"var epsg_projection = new OpenLayers.Projection('EPSG:%d');\n" % \
settings.EPSG_PROJECTION
js += u"var centerLonLat = new OpenLayers.LonLat(%f,\
%f).transform(epsg_display_projection, epsg_projection);\n" % \
settings.DEFAULT_CENTER
js += u"var media_path = '%s';\n" % settings.MEDIA_URL
js = u"""<script type="text/javascript"><!--
%s// !--></script>
""" % js
return js
class PointChooserWidget(forms.TextInput):
"""
Manage the edition of point on a map
"""
class Media:
css = {
"all": ("%sforms.css" % settings.MEDIA_URL,)
}
js = URL_OSM_JS + ["%sedit_map.js" % settings.MEDIA_URL]
def render(self, name, value, attrs=None):
'''
Render a map and latitude, longitude information field
'''
val = '0'
value_x, value_y = 0, 0
if value:
val = str(value)
if hasattr(value, 'x') and hasattr(value, 'y'):
value_x, value_y = value.x, value.y
elif isinstance(value, unicode) and value.startswith('POINT('):
try:
value_x, value_y = value.split('(')[1][:-1].split(' ')
value_x, value_y = float(value_x), float(value_y)
except:
value = None
else:
value = None
tpl = getMapJS()
tpl += u'<script src="%sedit_map.js"></script>\n' % settings.MEDIA_URL
tpl += u"""<div id='map_edit'></div>
<div id='live_lonlat'>
<p><label for='live_latitude'>%s</label>\
<input type='texte' name='live_latitude' id='live_latitude' size='8' \
disabled='true' value='%f'/></p>
<p><label for='live_longitude'>%s</label><input type='texte' \
name='live_longitude' id='live_longitude' size='8' disabled='true' \
value='%f'/></p>
</div>
<input type='hidden' name='%s' id='id_%s' value="%s"/>
""" % (_("Latitude"), value_y, _("Longitude"), value_x, name, name, val)
tpl += """<script type='text/javascript'><!--
init();
"""
if value:
tpl += '''var mylonlat = new OpenLayers.LonLat(%f,%f);
putMarker(mylonlat.transform(epsg_display_projection,
map.getProjectionObject()).clone());
''' % (value_x, value_y)
tpl += """// --></script>
<hr class='spacer'/>
"""
return mark_safe(tpl)
class PointField(models.PointField):
'''
Set the widget for the form field
'''
def formfield(self, **keys):
defaults = {'widget': PointChooserWidget}
keys.update(defaults)
return super(PointField, self).formfield(**keys)
class RouteChooserWidget(forms.TextInput):
"""
Manage the edition of route on a map
"""
class Media:
css = {
"all": ("%sforms.css" % settings.MEDIA_URL,)
}
js = ["%sedit_route_map.js" % settings.MEDIA_URL] + URL_OSM_JS
def render(self, name, value, attrs=None):
'''
Render a map and latitude, longitude information field
'''
tpl = getMapJS()
help_create = ''
if not value:
help_create = """<h3>%s</h3>
<p>%s</p>
<p>%s</p>
<p>%s</p>
<p>%s</p>
<p>%s</p>""" % (_("Creation mode"),
_("To start drawing the route click on the toggle button : \"Start drawing\"."),
_("Then click on the map to begin the drawing."),
_("You can add points by clicking again."),
_("To finish the drawing double click. When the drawing is finished you can \
edit it."),
_("While creating to undo a drawing click again on the toggle button \"Stop \
drawing\"."))
help_modify = """<h3>%s</h3>
<p>%s</p>
<p>%s</p>
<p>%s</p>""" % (_("Modification mode"),
_("To move a point click on it and drag it to the desired position."),
_("To delete a point move the mouse cursor over it and press the \"d\" key."),
_("To add a point click in the middle of a segment and drag the new point to \
the desired position"))
tpl += u'<script src="%sedit_route_map.js"></script>\n' % \
settings.MEDIA_URL
if not value:
tpl += u"""<div id='draw-toggle-off' class='toggle-button' \
onclick='toggleDrawOn();'>%s</div>
<div id='draw-toggle-on' class='toggle-button' \
onclick='toggleDrawOff();'>%s</div>
<hr class='spacer'/>""" % (_("Start drawing"), _("Stop drawing"))
tpl += """
<div id='map_edit'></div>"""
if not value:
tpl += '''
<div class='help-route' id='help-route-create'>%s</div>''' % help_create
style = ''
if value:
style = " style='display:block'"
tpl += """
<div class='help-route' id='help-route-modify'%s>%s</div>
<hr class='spacer'/>
<input type='hidden' name='%s' id='id_%s' value="%s"/>
""" % (style, help_modify, name, name, value)
tpl += """<script type='text/javascript'><!--
init();"""
if value:
tpl += """
var geometry='%s';
initFeature(geometry);""" % value.json
tpl += """
// --></script>
"""
return mark_safe(tpl)
class RouteField(models.LineStringField):
'''
Set the widget for the form field
'''
def formfield(self, **keys):
defaults = {'widget': RouteChooserWidget}
keys.update(defaults)
return super(RouteField, self).formfield(**keys)
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