mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-06 00:05:02 -05:00
bd7d913379
All pointer based methods have been removed. Now we have only: void setGeometry( const QgsGeometry& geom ) and QgsGeometry geometry() const Benefits include avoiding a whole lot of tricky pointer lifetime issues, potential memory leaks, and finally closing #777, which has survived for over 9 years!... Impacts on PyQGIS code: - no more need for the messy g = QgsGeometry( feature.geometry() ) workaround, just use g = feature.geometry() instead - IMPORTANT: you can no longer test whether a feature has geometry using `if f.geometry():`, since QgsFeature::geometry() will *always* return an object. Instead, use `if not f.geometry().isEmpty():`, or preferably the new method `if not f.hasGeometry():` Fix #777
156 lines
5.8 KiB
Python
156 lines
5.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
SinglePartsToMultiparts.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf 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__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
|
|
from qgis.core import Qgis, QgsFeature, QgsGeometry
|
|
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterTableField
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class SinglePartsToMultiparts(GeoAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
FIELD = 'FIELD'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def getIcon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'single_to_multi.png'))
|
|
|
|
def defineCharacteristics(self):
|
|
self.name, self.i18n_name = self.trAlgorithm('Singleparts to multipart')
|
|
self.group, self.i18n_group = self.trAlgorithm('Vector geometry tools')
|
|
|
|
self.addParameter(ParameterVector(self.INPUT, self.tr('Input layer')))
|
|
self.addParameter(ParameterTableField(self.FIELD,
|
|
self.tr('Unique ID field'), self.INPUT))
|
|
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Multipart')))
|
|
|
|
def processAlgorithm(self, progress):
|
|
layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
|
|
fieldName = self.getParameterValue(self.FIELD)
|
|
|
|
geomType = self.singleToMultiGeom(layer.dataProvider().geometryType())
|
|
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
|
|
layer.pendingFields().toList(), geomType, layer.crs())
|
|
|
|
inFeat = QgsFeature()
|
|
outFeat = QgsFeature()
|
|
inGeom = QgsGeometry()
|
|
outGeom = QgsGeometry()
|
|
|
|
index = layer.fieldNameIndex(fieldName)
|
|
unique = vector.getUniqueValues(layer, index)
|
|
|
|
current = 0
|
|
features = vector.features(layer)
|
|
total = 100.0 / (len(features) * len(unique))
|
|
if not len(unique) == layer.featureCount():
|
|
for i in unique:
|
|
multi_feature = []
|
|
first = True
|
|
features = vector.features(layer)
|
|
for inFeat in features:
|
|
atMap = inFeat.attributes()
|
|
idVar = atMap[index]
|
|
if unicode(idVar).strip() == unicode(i).strip():
|
|
if first:
|
|
attrs = atMap
|
|
first = False
|
|
inGeom = inFeat.geometry()
|
|
vType = inGeom.type()
|
|
feature_list = self.extractAsMulti(inGeom)
|
|
multi_feature.extend(feature_list)
|
|
|
|
current += 1
|
|
progress.setPercentage(int(current * total))
|
|
|
|
outFeat.setAttributes(attrs)
|
|
outGeom = QgsGeometry(self.convertGeometry(multi_feature,
|
|
vType))
|
|
outFeat.setGeometry(outGeom)
|
|
writer.addFeature(outFeat)
|
|
|
|
del writer
|
|
else:
|
|
raise GeoAlgorithmExecutionException(self.tr('Invalid unique ID field'))
|
|
|
|
def singleToMultiGeom(self, wkbType):
|
|
try:
|
|
if wkbType in (Qgis.WKBPoint, Qgis.WKBMultiPoint,
|
|
Qgis.WKBPoint25D, Qgis.WKBMultiPoint25D):
|
|
return Qgis.WKBMultiPoint
|
|
elif wkbType in (Qgis.WKBLineString, Qgis.WKBMultiLineString,
|
|
Qgis.WKBMultiLineString25D,
|
|
Qgis.WKBLineString25D):
|
|
|
|
return Qgis.WKBMultiLineString
|
|
elif wkbType in (Qgis.WKBPolygon, Qgis.WKBMultiPolygon,
|
|
Qgis.WKBMultiPolygon25D, Qgis.WKBPolygon25D):
|
|
|
|
return Qgis.WKBMultiPolygon
|
|
else:
|
|
return Qgis.WKBUnknown
|
|
except Exception:
|
|
pass
|
|
|
|
def extractAsMulti(self, geom):
|
|
if geom.type() == Qgis.Point:
|
|
if geom.isMultipart():
|
|
return geom.asMultiPoint()
|
|
else:
|
|
return [geom.asPoint()]
|
|
elif geom.type() == Qgis.Line:
|
|
if geom.isMultipart():
|
|
return geom.asMultiPolyline()
|
|
else:
|
|
return [geom.asPolyline()]
|
|
else:
|
|
if geom.isMultipart():
|
|
return geom.asMultiPolygon()
|
|
else:
|
|
return [geom.asPolygon()]
|
|
|
|
def convertGeometry(self, geom_list, vType):
|
|
if vType == Qgis.Point:
|
|
return QgsGeometry().fromMultiPoint(geom_list)
|
|
elif vType == Qgis.Line:
|
|
return QgsGeometry().fromMultiPolyline(geom_list)
|
|
else:
|
|
return QgsGeometry().fromMultiPolygon(geom_list)
|