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bd7d913379
All pointer based methods have been removed. Now we have only: void setGeometry( const QgsGeometry& geom ) and QgsGeometry geometry() const Benefits include avoiding a whole lot of tricky pointer lifetime issues, potential memory leaks, and finally closing #777, which has survived for over 9 years!... Impacts on PyQGIS code: - no more need for the messy g = QgsGeometry( feature.geometry() ) workaround, just use g = feature.geometry() instead - IMPORTANT: you can no longer test whether a feature has geometry using `if f.geometry():`, since QgsFeature::geometry() will *always* return an object. Instead, use `if not f.geometry().isEmpty():`, or preferably the new method `if not f.hasGeometry():` Fix #777
84 lines
3.1 KiB
Python
84 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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DeleteHoles.py
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---------------------
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Date : April 2015
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Copyright : (C) 2015 by Etienne Trimaille
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Etienne Trimaille'
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__date__ = 'April 2015'
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__copyright__ = '(C) 2015, Etienne Trimaille'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from qgis.core import QgsFeature, QgsGeometry
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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class DeleteHoles(GeoAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Delete holes')
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self.group, self.i18n_group = self.trAlgorithm('Vector geometry tools')
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_POLYGON]))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Cleaned')))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT))
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
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layer.pendingFields(),
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layer.wkbType(),
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layer.crs())
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features = vector.features(layer)
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total = 100.0 / len(features)
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feat = QgsFeature()
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for current, f in enumerate(features):
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geometry = f.geometry()
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if not geometry.isEmpty():
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if geometry.isMultipart():
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multi_polygon = geometry.asMultiPolygon()
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for polygon in multi_polygon:
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for ring in polygon[1:]:
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polygon.remove(ring)
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geometry = QgsGeometry.fromMultiPolygon(multi_polygon)
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else:
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polygon = geometry.asPolygon()
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for ring in polygon[1:]:
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polygon.remove(ring)
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geometry = QgsGeometry.fromPolygon(polygon)
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else:
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geometry = QgsGeometry(None)
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feat.setGeometry(geometry)
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feat.setAttributes(f.attributes())
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writer.addFeature(feat)
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progress.setPercentage(int(current * total))
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del writer
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