mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-09 00:35:20 -05:00
9d04f87249
The previous naming was too easily confused with processing outputs. Rename them to QgsProcessingParameterFileDestination, etc... to make it clearer what they are used for.
115 lines
4.2 KiB
Python
115 lines
4.2 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. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
from builtins import str
|
|
|
|
__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 (QgsProcessingUtils,
|
|
QgsFeatureSink,
|
|
QgsProcessingParameterFeatureSource,
|
|
QgsProcessingParameterField,
|
|
QgsProcessingParameterFolderDestination,
|
|
QgsProcessingOutputFolder,
|
|
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'
|
|
|
|
def group(self):
|
|
return self.tr('Vector general tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
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(QgsProcessingOutputFolder(self.OUTPUT, self.tr('Output directory')))
|
|
|
|
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)
|
|
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
|
|
|
|
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))
|
|
del sink
|
|
|
|
feedback.setProgress(int(current * total))
|
|
|
|
return {self.OUTPUT: directory}
|