mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-03 00:02:25 -05:00
82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Boundary.py
|
|
--------------
|
|
Date : July 2016
|
|
Copyright : (C) 2016 by Nyall Dawson
|
|
Email : nyall dot dawson 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__ = 'Nyall Dawson'
|
|
__date__ = 'July 2016'
|
|
__copyright__ = '(C) 2016, Nyall Dawson'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive323
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
|
|
from qgis.core import (QgsGeometry,
|
|
QgsWkbTypes)
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisFeatureBasedAlgorithm
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class Boundary(QgisFeatureBasedAlgorithm):
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'convex_hull.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Vector geometry tools')
|
|
|
|
def name(self):
|
|
return 'boundary'
|
|
|
|
def displayName(self):
|
|
return self.tr('Boundary')
|
|
|
|
def outputName(self):
|
|
return self.tr('Boundary')
|
|
|
|
def outputWkbType(self, input_wkb):
|
|
if QgsWkbTypes.geometryType(input_wkb) == QgsWkbTypes.LineGeometry:
|
|
output_wkb = QgsWkbTypes.MultiPoint
|
|
elif QgsWkbTypes.geometryType(input_wkb) == QgsWkbTypes.PolygonGeometry:
|
|
output_wkb = QgsWkbTypes.MultiLineString
|
|
if QgsWkbTypes.hasZ(input_wkb):
|
|
output_wkb = QgsWkbTypes.addZ(output_wkb)
|
|
if QgsWkbTypes.hasM(input_wkb):
|
|
output_wkb = QgsWkbTypes.addM(output_wkb)
|
|
|
|
return output_wkb
|
|
|
|
def processFeature(self, feature, feedback):
|
|
input_geometry = feature.geometry()
|
|
if input_geometry:
|
|
output_geometry = QgsGeometry(input_geometry.geometry().boundary())
|
|
if not output_geometry:
|
|
feedback.reportError(self.tr('No boundary for feature {} (possibly a closed linestring?)').format(feature.id()))
|
|
feature.clearGeometry()
|
|
else:
|
|
feature.setGeometry(output_geometry)
|
|
return feature
|