mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-06 00:05:02 -05:00
fd2c18ee16
temporary output layers in the provided processing context Should fix loss of intermediate memory layers when running a multi-step model
96 lines
3.5 KiB
Python
96 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
DeleteHoles.py
|
|
---------------------
|
|
Date : April 2015
|
|
Copyright : (C) 2015 by Etienne Trimaille
|
|
***************************************************************************
|
|
* *
|
|
* 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__ = 'Etienne Trimaille'
|
|
__date__ = 'April 2015'
|
|
__copyright__ = '(C) 2015, Etienne Trimaille'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from qgis.core import (QgsApplication,
|
|
QgsProcessingUtils)
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.parameters import (ParameterVector,
|
|
ParameterNumber)
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
|
|
class DeleteHoles(GeoAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
MIN_AREA = 'MIN_AREA'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QgsApplication.getThemeIcon("/providerQgis.svg")
|
|
|
|
def svgIconPath(self):
|
|
return QgsApplication.iconPath("providerQgis.svg")
|
|
|
|
def tags(self):
|
|
return self.tr('remove,delete,drop,holes,rings,fill').split(',')
|
|
|
|
def group(self):
|
|
return self.tr('Vector geometry tools')
|
|
|
|
def name(self):
|
|
return 'deleteholes'
|
|
|
|
def displayName(self):
|
|
return self.tr('Delete holes')
|
|
|
|
def defineCharacteristics(self):
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input layer'), [dataobjects.TYPE_VECTOR_POLYGON]))
|
|
self.addParameter(ParameterNumber(self.MIN_AREA,
|
|
self.tr('Remove holes with area less than'), 0, 10000000.0, default=0.0, optional=True))
|
|
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Cleaned'), datatype=[dataobjects.TYPE_VECTOR_POLYGON]))
|
|
|
|
def processAlgorithm(self, context, feedback):
|
|
layer = dataobjects.getLayerFromString(
|
|
self.getParameterValue(self.INPUT))
|
|
min_area = self.getParameterValue(self.MIN_AREA)
|
|
if min_area is not None:
|
|
try:
|
|
min_area = float(min_area)
|
|
except:
|
|
pass
|
|
if min_area == 0.0:
|
|
min_area = -1.0
|
|
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(),
|
|
context)
|
|
|
|
features = QgsProcessingUtils.getFeatures(layer, context)
|
|
total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
|
|
|
|
for current, f in enumerate(features):
|
|
if f.hasGeometry():
|
|
if min_area is not None:
|
|
f.setGeometry(f.geometry().removeInteriorRings(min_area))
|
|
else:
|
|
f.setGeometry(f.geometry().removeInteriorRings())
|
|
writer.addFeature(f)
|
|
feedback.setProgress(int(current * total))
|
|
|
|
del writer
|