django-geopositionmap 0.0.7

Django model field that can hold a geoposition with bound method, gis Point type, and corresponding admin widget.

=====================
django-geopositionmap
=====================

A model field that can hold a geoposition (latitude/longitude), and corresponding admin/form widget.
Porting to GeoDjango Point type.


Prerequisites
-------------

django-geopositionmap requires Django 1.4.10 or greater.
GeoDjango gis contrib geospatial framework.


Installation
------------

- Use your favorite Python packaging tool to install ``geopositionmap``
from `PyPI`_, e.g.::

pip install django-geopositionmap

- Add ``"geopositionmap"`` to your ``INSTALLED_APPS`` setting::

INSTALLED_APPS = (
# …
"geopositionmap",
)

- If you are still using Django <1.3, you are advised to install
`django-staticfiles`_ for static file serving.


Usage
-----

``django-geopositionmap`` comes with a model field that makes it pretty
easy to add a geoposition field to one of your models. To make use of
it:

- In your ``myapp/models.py``::

from django.db import models
from geopositionmap.geoFields import LatLngField

class POI(models.Model):
name = models.CharField(max_length=100)
position = LatLngField()

- This enables the following simple API::

>>> from myapp.models import POI
>>> poi = POI.objects.get(id=1)
>>> poi.position
LatLng(52.522906,13.41156)
>>> poi.position.lat
52.522906
>>> poi.position.lng
13.41156

- Some methods:

>>> pos = LatLng(10.0, 11.0)
>>> pos.geosPoint
<Point object at 0x4175910L>
>>> type(pos.geosPoint)
<class 'django.contrib.gis.geos.point.Point'>
>>> pos
LatLng(10.0,11.0)
>>> pos = LatLng('10','11')
>>> pos
LatLng(10.0,11.0)
>>> pos.lat
10.0
>>> pos.lng
11.0
>>> print pos
+010.0000000000000000,+011.0000000000000000
>>> type(pos)
<class 'geopositionmap.LatLng'>
>>> pos.to_string()
u'+010.0000000000000000,+011.0000000000000000'
>>> type(pos.to_string())
<type 'unicode'>
>>> pos.pos
(10.0, 11.0)
>>> type (pos.pos)
<type 'tuple'>
>>> pos.lat = 14
>>> pos.lng = -12
>>> pos
LatLng(14.0, -12.0)
>>> pos.setPos(41,46)
LatLng(41.0, 46.0)
>>> pos.setPos('41.15 46.56')
LatLng(41.15, 46.56)
>>>
>>> ne = LatLng('-13.0','-11.0')
>>> pos = LatLng('-14.0','-12.3')
>>> sw = LatLng('-15.0','-13.0')
>>> pos.isBounded(ne,sw)
LatLng(-14.0, -12.3)
>>> pos = LatLng('-14.0','12.3')
>>> pos.isBounded(ne,sw)
False



Form field and widget
---------------------

Admin
^^^^^

If you use a ``LatLngField`` in the admin it will automatically
show a `Google Maps`_ widget with a marker at the currently stored
position. You can drag and drop the marker with the mouse and the
corresponding latitude and longitude fields will be updated
accordingly.

It looks like this:

|geopositionmap-widget-admin|


Manager in models
-----------------

Models
^^^^^^

You can use custom Manager to manage custom methods in your models object.
LatLngField object is a geo position coordinate, thus you can find out if your point is right
into a boud area (NE,SW).

- In your ``myapp/models.py``::

from django.db import models
from geopositionmap.geoFields import LatLngField
from geopositionmap.geoManager import geoManager

objects = geoManager()

class POI(models.Model):
name = models.CharField(max_length=100)
position = LatLngField()

def is_bounded(self):
return self.position

- This enables the following simple API::

>>> from myapp.models import POI
>>> POI.objects.bound('42,13','40,10') #retrive POIs into bound rectangle, if are active
[<POI: POI object>]
>>> POI.objects.bound() #retrive all active POIs
[]


- Active on map method

from django.db import models
from geopositionmap.geoFields import LatLngField
from geopositionmap.geoManager import geoManager

objects = geoManager()

class POI(models.Model):
name = models.CharField(max_length=100)
position = LatLngField()

def active_OnMap(self):
return False #return 'True' to active is_bounded method

def is_bounded(self):
return self.position

- Use active_OnMap method enables the following simple API::

>>> from myapp.models import POI
>>> POI.objects.bound('42,13','40,10')
[]
>>> POI.objects.bound()
[]


Regular Forms
^^^^^^^^^^^^^

Using the map widget on a regular form outside of the admin requires
just a little more work. In your template make sure that

- `jQuery`_ is included
- the static files (JS, CSS) of the map widget are included (just use
``{{ form.media }}``)

**Example**::

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<form method="POST" action="">{% csrf_token %}
{{ form.media }}
{{ form.as_p }}
</form>


Settings
--------

You can customize the `MapOptions`_ and `MarkerOptions`_ used to initialize the
map and marker in JavaScript by defining ``GEOPOSITION_MAP_OPTIONS`` or
``GEOPOSITION_MARKER_OPTIONS`` in your ``settings.py``.

**Example**::

GEOPOSITION_MAP_OPTIONS = {
'minZoom': 3,
'maxZoom': 15,
}

GEOPOSITION_MARKER_OPTIONS = {
'cursor': 'move'
}

Please note that you cannot use a value like ``new google.maps.LatLng(52.5,13.4)``
for a setting like ``center`` or ``position`` because that would end up as a
string in the JavaScript code and not be evaluated. Please use
`Lat/Lng Object Literals`_ for that purpose, e.g. ``{'lat': 52.5, 'lng': 13.4}``.

You can also customize the height of the displayed map widget by setting
``GEOPOSITION_MAP_WIDGET_HEIGHT`` to an integer value (default is 480).


License
-------

`MIT`_


.. _Google Maps: http://code.google.com/apis/maps/documentation/javascript/
.. |geopositionmap-widget-admin| image:: docs/images/admin.jpg
.. _jQuery: http://jquery.com
.. _MIT: http://philippbosch.mit-license.org/
.. _MapOptions: https://developers.google.com/maps/documentation/javascript/reference?csw=1#MapOptions
.. _MarkerOptions: https://developers.google.com/maps/documentation/javascript/reference?csw=1#MarkerOptions
.. _Lat/Lng Object Literals: https://developers.google.com/maps/documentation/javascript/examples/map-latlng-literal