mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-20 00:06:36 -04:00
147 lines
4.6 KiB
Python
147 lines
4.6 KiB
Python
"""
|
|
***************************************************************************
|
|
LinesToPolygons.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"
|
|
|
|
import os
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
|
|
from qgis.core import (
|
|
QgsApplication,
|
|
QgsFeature,
|
|
QgsGeometry,
|
|
QgsGeometryCollection,
|
|
QgsPolygon,
|
|
QgsMultiPolygon,
|
|
QgsMultiSurface,
|
|
QgsWkbTypes,
|
|
QgsFeatureSink,
|
|
QgsProcessing,
|
|
QgsProcessingParameterFeatureSource,
|
|
QgsProcessingParameterFeatureSink,
|
|
QgsProcessingUtils,
|
|
)
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisFeatureBasedAlgorithm
|
|
from processing.tools import dataobjects, vector
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class LinesToPolygons(QgisFeatureBasedAlgorithm):
|
|
|
|
def icon(self):
|
|
return QgsApplication.getThemeIcon("/algorithms/mAlgorithmLineToPolygon.svg")
|
|
|
|
def svgIconPath(self):
|
|
return QgsApplication.iconPath("/algorithms/mAlgorithmLineToPolygon.svg")
|
|
|
|
def tags(self):
|
|
return self.tr("line,polygon,convert").split(",")
|
|
|
|
def group(self):
|
|
return self.tr("Vector geometry")
|
|
|
|
def groupId(self):
|
|
return "vectorgeometry"
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def name(self):
|
|
return "linestopolygons"
|
|
|
|
def displayName(self):
|
|
return self.tr("Lines to polygons")
|
|
|
|
def outputName(self):
|
|
return self.tr("Polygons")
|
|
|
|
def outputType(self):
|
|
return QgsProcessing.SourceType.TypeVectorPolygon
|
|
|
|
def inputLayerTypes(self):
|
|
return [QgsProcessing.SourceType.TypeVectorLine]
|
|
|
|
def outputWkbType(self, input_wkb_type):
|
|
return self.convertWkbToPolygons(input_wkb_type)
|
|
|
|
def processFeature(self, feature, context, feedback):
|
|
if feature.hasGeometry():
|
|
feature.setGeometry(QgsGeometry(self.convertToPolygons(feature.geometry())))
|
|
if feature.geometry().isEmpty():
|
|
feedback.reportError(
|
|
self.tr(
|
|
"One or more line ignored due to geometry not having a minimum of three vertices."
|
|
)
|
|
)
|
|
return [feature]
|
|
|
|
def supportInPlaceEdit(self, layer):
|
|
return False
|
|
|
|
def convertWkbToPolygons(self, wkb):
|
|
multi_wkb = QgsWkbTypes.Type.NoGeometry
|
|
if (
|
|
QgsWkbTypes.singleType(QgsWkbTypes.flatType(wkb))
|
|
== QgsWkbTypes.Type.LineString
|
|
):
|
|
multi_wkb = QgsWkbTypes.Type.MultiPolygon
|
|
elif (
|
|
QgsWkbTypes.singleType(QgsWkbTypes.flatType(wkb))
|
|
== QgsWkbTypes.Type.CompoundCurve
|
|
):
|
|
multi_wkb = QgsWkbTypes.Type.MultiSurface
|
|
if QgsWkbTypes.hasM(wkb):
|
|
multi_wkb = QgsWkbTypes.addM(multi_wkb)
|
|
if QgsWkbTypes.hasZ(wkb):
|
|
multi_wkb = QgsWkbTypes.addZ(multi_wkb)
|
|
|
|
return multi_wkb
|
|
|
|
def convertToPolygons(self, geometry):
|
|
surfaces = self.getSurfaces(geometry.constGet())
|
|
output_wkb = self.convertWkbToPolygons(geometry.wkbType())
|
|
out_geom = None
|
|
if QgsWkbTypes.flatType(output_wkb) == QgsWkbTypes.Type.MultiPolygon:
|
|
out_geom = QgsMultiPolygon()
|
|
else:
|
|
out_geom = QgsMultiSurface()
|
|
|
|
for surface in surfaces:
|
|
out_geom.addGeometry(surface)
|
|
|
|
return out_geom
|
|
|
|
def getSurfaces(self, geometry):
|
|
surfaces = []
|
|
if isinstance(geometry, QgsGeometryCollection):
|
|
# collection
|
|
for i in range(geometry.numGeometries()):
|
|
surfaces.extend(self.getSurfaces(geometry.geometryN(i)))
|
|
else:
|
|
# not collection
|
|
if geometry.vertexCount() > 2:
|
|
surface = QgsPolygon()
|
|
surface.setExteriorRing(geometry.clone())
|
|
surfaces.append(surface)
|
|
|
|
return surfaces
|