mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-03 00:02:25 -05:00
132 lines
4.9 KiB
Python
132 lines
4.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
VectorSplit.py
|
|
---------------------
|
|
Date : September 2014
|
|
Copyright : (C) 2014 by Alexander Bruy
|
|
Email : alexander dot bruy 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__ = 'Alexander Bruy'
|
|
__date__ = 'September 2014'
|
|
__copyright__ = '(C) 2014, Alexander Bruy'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
|
|
from qgis.core import (QgsApplication,
|
|
QgsProcessingUtils,
|
|
QgsFeatureSink,
|
|
QgsProcessingParameterFeatureSource,
|
|
QgsProcessingParameterField,
|
|
QgsProcessingParameterFolderDestination,
|
|
QgsProcessingOutputFolder,
|
|
QgsProcessingException,
|
|
QgsProcessingOutputMultipleLayers,
|
|
QgsExpression,
|
|
QgsFeatureRequest)
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
from processing.tools.system import mkdir
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class VectorSplit(QgisAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
FIELD = 'FIELD'
|
|
OUTPUT = 'OUTPUT'
|
|
OUTPUT_LAYERS = 'OUTPUT_LAYERS'
|
|
|
|
def group(self):
|
|
return self.tr('Vector general')
|
|
|
|
def groupId(self):
|
|
return 'vectorgeneral'
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
|
|
self.tr('Input layer')))
|
|
|
|
self.addParameter(QgsProcessingParameterField(self.FIELD,
|
|
self.tr('Unique ID field'), None, self.INPUT))
|
|
|
|
self.addParameter(QgsProcessingParameterFolderDestination(self.OUTPUT,
|
|
self.tr('Output directory')))
|
|
self.addOutput(QgsProcessingOutputMultipleLayers(self.OUTPUT_LAYERS, self.tr('Output layers')))
|
|
|
|
def icon(self):
|
|
return QgsApplication.getThemeIcon("/algorithms/mAlgorithmSplitLayer.svg")
|
|
|
|
def svgIconPath(self):
|
|
return QgsApplication.iconPath("/algorithms/mAlgorithmSplitLayer.svg")
|
|
|
|
def name(self):
|
|
return 'splitvectorlayer'
|
|
|
|
def displayName(self):
|
|
return self.tr('Split vector layer')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
source = self.parameterAsSource(parameters, self.INPUT, context)
|
|
if source is None:
|
|
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
|
|
|
|
fieldName = self.parameterAsString(parameters, self.FIELD, context)
|
|
directory = self.parameterAsString(parameters, self.OUTPUT, context)
|
|
|
|
mkdir(directory)
|
|
|
|
fieldIndex = source.fields().lookupField(fieldName)
|
|
uniqueValues = source.uniqueValues(fieldIndex)
|
|
baseName = os.path.join(directory, '{0}'.format(fieldName))
|
|
|
|
fields = source.fields()
|
|
crs = source.sourceCrs()
|
|
geomType = source.wkbType()
|
|
|
|
total = 100.0 / len(uniqueValues) if uniqueValues else 1
|
|
output_layers = []
|
|
|
|
for current, i in enumerate(uniqueValues):
|
|
if feedback.isCanceled():
|
|
break
|
|
fName = u'{0}_{1}.shp'.format(baseName, str(i).strip())
|
|
feedback.pushInfo(self.tr('Creating layer: {}').format(fName))
|
|
|
|
sink, dest = QgsProcessingUtils.createFeatureSink(fName, context, fields, geomType, crs)
|
|
|
|
filter = '{} = {}'.format(QgsExpression.quotedColumnRef(fieldName), QgsExpression.quotedValue(i))
|
|
req = QgsFeatureRequest().setFilterExpression(filter)
|
|
|
|
count = 0
|
|
for f in source.getFeatures(req):
|
|
if feedback.isCanceled():
|
|
break
|
|
sink.addFeature(f, QgsFeatureSink.FastInsert)
|
|
count += 1
|
|
feedback.pushInfo(self.tr('Added {} features to layer').format(count))
|
|
output_layers.append(fName)
|
|
del sink
|
|
|
|
feedback.setProgress(int(current * total))
|
|
|
|
return {self.OUTPUT: directory, self.OUTPUT_LAYERS: output_layers}
|