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9d04f87249
The previous naming was too easily confused with processing outputs. Rename them to QgsProcessingParameterFileDestination, etc... to make it clearer what they are used for.
92 lines
3.5 KiB
Python
92 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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BarPlot.py
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---------------------
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Date : January 2013
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Copyright : (C) 2013 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__ = 'January 2013'
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__copyright__ = '(C) 2013, 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 plotly as plt
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import plotly.graph_objs as go
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from qgis.core import (QgsApplication,
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QgsFeatureSink,
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QgsProcessingUtils,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterField,
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QgsProcessingParameterFileDestination,
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QgsProcessingOutputHtml)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.tools import vector
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class BarPlot(QgisAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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NAME_FIELD = 'NAME_FIELD'
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VALUE_FIELD = 'VALUE_FIELD'
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def group(self):
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return self.tr('Graphics')
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def __init__(self):
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super().__init__()
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
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self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterField(self.NAME_FIELD,
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self.tr('Category name field'),
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None, self.INPUT, QgsProcessingParameterField.Any))
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self.addParameter(QgsProcessingParameterField(self.VALUE_FIELD,
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self.tr('Value field'),
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None, self.INPUT, QgsProcessingParameterField.Numeric))
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self.addParameter(QgsProcessingParameterFileDestination(self.OUTPUT, self.tr('Added'), self.tr('HTML files (*.html)')))
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self.addOutput(QgsProcessingOutputHtml(self.OUTPUT, self.tr('Bar plot')))
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def name(self):
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return 'barplot'
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def displayName(self):
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return self.tr('Bar plot')
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def processAlgorithm(self, parameters, context, feedback):
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source = self.parameterAsSource(parameters, self.INPUT, context)
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namefieldname = self.parameterAsString(parameters, self.NAME_FIELD, context)
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valuefieldname = self.parameterAsString(parameters, self.VALUE_FIELD, context)
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output = self.parameterAsFileOutput(parameters, self.OUTPUT, context)
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values = vector.values(source, valuefieldname)
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x_var = [i[namefieldname] for i in source.getFeatures()]
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data = [go.Bar(x=x_var,
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y=values[valuefieldname])]
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plt.offline.plot(data, filename=output, auto_open=False)
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return {self.OUTPUT: output}
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