mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-30 00:07:09 -04:00
158 lines
6.1 KiB
Python
158 lines
6.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Gridify.py
|
|
---------------------
|
|
Date : May 2010
|
|
Copyright : (C) 2010 by Michael Minn
|
|
Email : pyqgis at michaelminn 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__ = 'Michael Minn'
|
|
__date__ = 'May 2010'
|
|
__copyright__ = '(C) 2010, Michael Minn'
|
|
|
|
# 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.PyQt.QtCore import QVariant
|
|
from qgis.core import (QgsFields,
|
|
QgsField,
|
|
QgsFeatureRequest,
|
|
QgsFeatureSink,
|
|
QgsProcessing,
|
|
QgsProcessingException,
|
|
QgsProcessingParameterMultipleLayers,
|
|
QgsProcessingParameterFeatureSink,
|
|
QgsMapLayer)
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class Merge(QgisAlgorithm):
|
|
LAYERS = 'LAYERS'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'merge_shapes.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Vector general tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterMultipleLayers(self.LAYERS,
|
|
self.tr('Layers to merge'),
|
|
QgsProcessing.TypeVectorAny))
|
|
|
|
self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Merged')))
|
|
|
|
def name(self):
|
|
return 'mergevectorlayers'
|
|
|
|
def displayName(self):
|
|
return self.tr('Merge vector layers')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
input_layers = self.parameterAsLayerList(parameters, self.LAYERS, context)
|
|
|
|
layers = []
|
|
fields = QgsFields()
|
|
totalFeatureCount = 0
|
|
for layer in input_layers:
|
|
if layer.type() != QgsMapLayer.VectorLayer:
|
|
raise QgsProcessingException(
|
|
self.tr('All layers must be vector layers!'))
|
|
|
|
if (len(layers) > 0):
|
|
if (layer.wkbType() != layers[0].wkbType()):
|
|
raise QgsProcessingException(
|
|
self.tr('All layers must have same geometry type!'))
|
|
|
|
layers.append(layer)
|
|
totalFeatureCount += layer.featureCount()
|
|
|
|
for sindex, sfield in enumerate(layer.fields()):
|
|
found = None
|
|
for dfield in fields:
|
|
if (dfield.name().upper() == sfield.name().upper()):
|
|
found = dfield
|
|
if (dfield.type() != sfield.type()):
|
|
raise QgsProcessingException(
|
|
self.tr('{} field in layer {} has different '
|
|
'data type than in other layers.'.format(sfield.name(), layerSource)))
|
|
|
|
if not found:
|
|
fields.append(sfield)
|
|
|
|
add_layer_field = False
|
|
if fields.lookupField('layer') < 0:
|
|
fields.append(QgsField('layer', QVariant.String, '', 100))
|
|
add_layer_field = True
|
|
add_path_field = False
|
|
if fields.lookupField('path') < 0:
|
|
fields.append(QgsField('path', QVariant.String, '', 200))
|
|
add_path_field = True
|
|
|
|
total = 100.0 / totalFeatureCount if totalFeatureCount else 1
|
|
dest_crs = layers[0].crs()
|
|
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
|
|
fields, layers[0].wkbType(), dest_crs)
|
|
|
|
featureCount = 0
|
|
for layer in layers:
|
|
for feature in layer.getFeatures(QgsFeatureRequest().setDestinationCrs(dest_crs)):
|
|
if feedback.isCanceled():
|
|
break
|
|
|
|
sattributes = feature.attributes()
|
|
dattributes = []
|
|
for dindex, dfield in enumerate(fields):
|
|
if add_layer_field and dfield.name() == 'layer':
|
|
dattributes.append(layer.name())
|
|
continue
|
|
if add_path_field and dfield.name() == 'path':
|
|
dattributes.append(layer.publicSource())
|
|
continue
|
|
|
|
if (dfield.type() == QVariant.Int, QVariant.UInt, QVariant.LongLong, QVariant.ULongLong):
|
|
dattribute = 0
|
|
elif (dfield.type() == QVariant.Double):
|
|
dattribute = 0.0
|
|
else:
|
|
dattribute = ''
|
|
|
|
for sindex, sfield in enumerate(layer.fields()):
|
|
if (sfield.name().upper() == dfield.name().upper()):
|
|
if (sfield.type() != dfield.type()):
|
|
raise QgsProcessingException(
|
|
self.tr('Attribute type mismatch'))
|
|
dattribute = sattributes[sindex]
|
|
break
|
|
|
|
dattributes.append(dattribute)
|
|
|
|
feature.setAttributes(dattributes)
|
|
sink.addFeature(feature, QgsFeatureSink.FastInsert)
|
|
featureCount += 1
|
|
feedback.setProgress(int(featureCount * total))
|
|
|
|
return {self.OUTPUT: dest_id}
|