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106 lines
3.7 KiB
Python
106 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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LinesToPolygons.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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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__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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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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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import QgsFeature, QgsGeometry, QgsWkbTypes, QgsProcessingUtils
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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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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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class LinesToPolygons(QgisAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'to_lines.png'))
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def tags(self):
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return self.tr('line,polygon,convert').split(',')
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def group(self):
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return self.tr('Vector geometry tools')
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def __init__(self):
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super().__init__()
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Input layer'),
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[dataobjects.TYPE_VECTOR_LINE]))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Polygons from lines'), datatype=[dataobjects.TYPE_VECTOR_POLYGON]))
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def name(self):
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return 'linestopolygons'
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def displayName(self):
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return self.tr('Lines to polygons')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), QgsWkbTypes.Polygon,
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layer.crs(), context)
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outFeat = QgsFeature()
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
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for current, f in enumerate(features):
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outGeomList = []
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if f.geometry().isMultipart():
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outGeomList = f.geometry().asMultiPolyline()
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else:
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outGeomList.append(f.geometry().asPolyline())
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polyGeom = self.removeBadLines(outGeomList)
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if len(polyGeom) != 0:
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outFeat.setGeometry(QgsGeometry.fromPolygon(polyGeom))
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attrs = f.attributes()
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outFeat.setAttributes(attrs)
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writer.addFeature(outFeat)
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feedback.setProgress(int(current * total))
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del writer
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def removeBadLines(self, lines):
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geom = []
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if len(lines) == 1:
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if len(lines[0]) > 2:
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geom = lines
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else:
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geom = []
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else:
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geom = [elem for elem in lines if len(elem) > 2]
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return geom
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