mirror of
https://github.com/qgis/QGIS.git
synced 2025-11-04 00:04:25 -05:00
102 lines
4.2 KiB
Python
102 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
AddTableField.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__ = '$Format:%H$'
|
|
|
|
from PyQt4.QtCore import QVariant
|
|
from qgis.core import QgsField, QgsFeature, QgsGeometry
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterString
|
|
from processing.core.parameters import ParameterNumber
|
|
from processing.core.parameters import ParameterSelection
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
|
|
class AddTableField(GeoAlgorithm):
|
|
|
|
OUTPUT_LAYER = 'OUTPUT_LAYER'
|
|
INPUT_LAYER = 'INPUT_LAYER'
|
|
FIELD_NAME = 'FIELD_NAME'
|
|
FIELD_TYPE = 'FIELD_TYPE'
|
|
FIELD_LENGTH = 'FIELD_LENGTH'
|
|
FIELD_PRECISION = 'FIELD_PRECISION'
|
|
|
|
TYPES = [QVariant.Int, QVariant.Double, QVariant.String]
|
|
|
|
def defineCharacteristics(self):
|
|
self.name, self.i18n_name = self.trAlgorithm('Add field to attributes table')
|
|
self.group, self.i18n_group = self.trAlgorithm('Vector table tools')
|
|
|
|
self.type_names = [self.tr('Integer'),
|
|
self.tr('Float'),
|
|
self.tr('String')]
|
|
|
|
self.addParameter(ParameterVector(self.INPUT_LAYER,
|
|
self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_ANY], False))
|
|
self.addParameter(ParameterString(self.FIELD_NAME,
|
|
self.tr('Field name')))
|
|
self.addParameter(ParameterSelection(self.FIELD_TYPE,
|
|
self.tr('Field type'), self.type_names))
|
|
self.addParameter(ParameterNumber(self.FIELD_LENGTH,
|
|
self.tr('Field length'), 1, 255, 10))
|
|
self.addParameter(ParameterNumber(self.FIELD_PRECISION,
|
|
self.tr('Field precision'), 0, 10, 0))
|
|
self.addOutput(OutputVector(
|
|
self.OUTPUT_LAYER, self.tr('Added')))
|
|
|
|
def processAlgorithm(self, progress):
|
|
fieldType = self.getParameterValue(self.FIELD_TYPE)
|
|
fieldName = self.getParameterValue(self.FIELD_NAME)
|
|
fieldLength = self.getParameterValue(self.FIELD_LENGTH)
|
|
fieldPrecision = self.getParameterValue(self.FIELD_PRECISION)
|
|
output = self.getOutputFromName(self.OUTPUT_LAYER)
|
|
|
|
layer = dataobjects.getObjectFromUri(
|
|
self.getParameterValue(self.INPUT_LAYER))
|
|
|
|
provider = layer.dataProvider()
|
|
fields = provider.fields()
|
|
fields.append(QgsField(fieldName, self.TYPES[fieldType], '',
|
|
fieldLength, fieldPrecision))
|
|
writer = output.getVectorWriter(fields, provider.geometryType(),
|
|
layer.crs())
|
|
outFeat = QgsFeature()
|
|
inGeom = QgsGeometry()
|
|
nElement = 0
|
|
features = vector.features(layer)
|
|
nFeat = len(features)
|
|
for inFeat in features:
|
|
progress.setPercentage(int(100 * nElement / nFeat))
|
|
nElement += 1
|
|
inGeom = inFeat.geometry()
|
|
outFeat.setGeometry(inGeom)
|
|
atMap = inFeat.attributes()
|
|
atMap.append(None)
|
|
outFeat.setAttributes(atMap)
|
|
writer.addFeature(outFeat)
|
|
del writer
|