mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-31 00:06:02 -04:00
88 lines
3.1 KiB
Python
Executable File
88 lines
3.1 KiB
Python
Executable File
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
__init__.py
|
|
---------------------
|
|
Date : January 2007
|
|
Copyright : (C) 2007 by Martin Dobias
|
|
Email : wonder dot sk at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* 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 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Martin Dobias'
|
|
__date__ = 'January 2007'
|
|
__copyright__ = '(C) 2007, Martin Dobias'
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import sip
|
|
try:
|
|
apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime", "QUrl", "QVariant"]
|
|
for api in apis:
|
|
sip.setapi(api, 2)
|
|
except ValueError:
|
|
# API has already been set so we can't set it again.
|
|
pass
|
|
|
|
from qgis.core import QgsFeature, QgsGeometry
|
|
|
|
try:
|
|
# Add a __nonzero__ method onto QPyNullVariant so we can check for null values easier.
|
|
# >>> value = QPyNullVariant("int")
|
|
# >>> if value:
|
|
# >>> print "Not a null value"
|
|
from types import MethodType
|
|
from PyQt4.QtCore import QPyNullVariant
|
|
def __nonzero__(self):
|
|
return False
|
|
|
|
def __repr__(self):
|
|
return 'NULL'
|
|
|
|
def __eq__(self, other):
|
|
return isinstance(other, QPyNullVariant) or other is None
|
|
|
|
def __ne__(self, other):
|
|
return not isinstance(other, QPyNullVariant) and other is not None
|
|
|
|
QPyNullVariant.__nonzero__ = MethodType(__nonzero__, None, QPyNullVariant)
|
|
QPyNullVariant.__repr__ = MethodType(__repr__, None, QPyNullVariant)
|
|
QPyNullVariant.__eq__= MethodType(__eq__, None, QPyNullVariant)
|
|
QPyNullVariant.__ne__= MethodType(__ne__, None, QPyNullVariant)
|
|
|
|
# define a dummy QPyNullVariant instance NULL in qgis.core
|
|
# this is mainly used to compare against
|
|
# so one can write if feat['attr'] == NULL:
|
|
from qgis import core
|
|
core.NULL = QPyNullVariant( int )
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
def mapping_feature(feature):
|
|
geom = feature.geometry()
|
|
properties = {}
|
|
fields = [field.name() for field in feature.fields()]
|
|
properties = dict(zip(fields, feature.attributes()))
|
|
return {
|
|
'type' : 'Feature',
|
|
'properties' : properties,
|
|
'geometry' : geom.__geo_interface__}
|
|
|
|
def mapping_geometry(geometry):
|
|
geo = geometry.exportToGeoJSON()
|
|
# We have to use eval because exportToGeoJSON() gives us
|
|
# back a string that looks like a dictionary.
|
|
return eval(geo)
|
|
|
|
QgsFeature.__geo_interface__ = property(mapping_feature)
|
|
QgsGeometry.__geo_interface__ = property(mapping_geometry)
|