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Merge pull request #3346 from nyalldawson/processing
Some processing features + fixes
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Original file line number | Diff line number | Diff line change |
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# -*- coding: utf-8 -*- | ||
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""" | ||
*************************************************************************** | ||
Smooth.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. * | ||
* * | ||
*************************************************************************** | ||
""" | ||
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__author__ = 'Nyall Dawson' | ||
__date__ = 'July 2016' | ||
__copyright__ = '(C) 2016, Nyall Dawson' | ||
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# This will get replaced with a git SHA1 when you do a git archive323 | ||
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__revision__ = '$Format:%H$' | ||
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import os | ||
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from qgis.core import QgsFeature | ||
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from qgis.PyQt.QtGui import QIcon | ||
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from processing.core.GeoAlgorithm import GeoAlgorithm | ||
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException | ||
from processing.core.parameters import ParameterVector | ||
from processing.core.outputs import OutputVector | ||
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 MergeLines(GeoAlgorithm): | ||
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INPUT_LAYER = 'INPUT_LAYER' | ||
OUTPUT_LAYER = 'OUTPUT_LAYER' | ||
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def getIcon(self): | ||
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'to_lines.png')) | ||
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def defineCharacteristics(self): | ||
self.name, self.i18n_name = self.trAlgorithm('Merge lines') | ||
self.group, self.i18n_group = self.trAlgorithm('Vector geometry tools') | ||
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self.addParameter(ParameterVector(self.INPUT_LAYER, | ||
self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_LINE])) | ||
self.addOutput(OutputVector(self.OUTPUT_LAYER, self.tr('Merged'))) | ||
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def processAlgorithm(self, progress): | ||
layer = dataobjects.getObjectFromUri( | ||
self.getParameterValue(self.INPUT_LAYER)) | ||
provider = layer.dataProvider() | ||
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writer = self.getOutputFromName( | ||
self.OUTPUT_LAYER).getVectorWriter( | ||
layer.fields().toList(), | ||
provider.geometryType(), | ||
layer.crs()) | ||
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features = vector.features(layer) | ||
total = 100.0 / len(features) | ||
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for current, inFeat in enumerate(features): | ||
outFeat = QgsFeature() | ||
attrs = inFeat.attributes() | ||
outFeat.setAttributes(attrs) | ||
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inGeom = inFeat.geometry() | ||
if inGeom: | ||
outGeom = inGeom.mergeLines() | ||
if outGeom is None: | ||
raise GeoAlgorithmExecutionException( | ||
self.tr('Error merging lines')) | ||
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outFeat.setGeometry(outGeom) | ||
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writer.addFeature(outFeat) | ||
progress.setPercentage(int(current * total)) | ||
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del writer |
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31 changes: 31 additions & 0 deletions
31
python/plugins/processing/tests/testdata/dissolve_polys.gfs
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Original file line number | Diff line number | Diff line change |
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<GMLFeatureClassList> | ||
<GMLFeatureClass> | ||
<Name>dissolve_polys</Name> | ||
<ElementPath>dissolve_polys</ElementPath> | ||
<GeometryType>3</GeometryType> | ||
<SRSName>EPSG:4326</SRSName> | ||
<DatasetSpecificInfo> | ||
<FeatureCount>10</FeatureCount> | ||
<ExtentXMin>-1.00000</ExtentXMin> | ||
<ExtentXMax>9.16296</ExtentXMax> | ||
<ExtentYMin>-3.00000</ExtentYMin> | ||
<ExtentYMax>6.08868</ExtentYMax> | ||
</DatasetSpecificInfo> | ||
<PropertyDefn> | ||
<Name>name</Name> | ||
<ElementPath>name</ElementPath> | ||
<Type>String</Type> | ||
<Width>2</Width> | ||
</PropertyDefn> | ||
<PropertyDefn> | ||
<Name>intval</Name> | ||
<ElementPath>intval</ElementPath> | ||
<Type>Integer</Type> | ||
</PropertyDefn> | ||
<PropertyDefn> | ||
<Name>floatval</Name> | ||
<ElementPath>floatval</ElementPath> | ||
<Type>Real</Type> | ||
</PropertyDefn> | ||
</GMLFeatureClass> | ||
</GMLFeatureClassList> |
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