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b1cadb1822
have specific icons, instead of generic qgis icon We consider these 'top level' algorithms, and using the standard algorithm icon should help reflect this and differentiate them from 3rd party algorithms.
80 lines
3.0 KiB
Python
80 lines
3.0 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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import numpy as np
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from qgis.core import (QgsApplication,
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QgsProcessingUtils)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.core.parameters import ParameterTable
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from processing.core.parameters import ParameterTableField
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from processing.core.outputs import OutputHTML
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from processing.tools import vector
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class PolarPlot(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(ParameterTable(self.INPUT,
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self.tr('Input table')))
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self.addParameter(ParameterTableField(self.NAME_FIELD,
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self.tr('Category name field'), self.INPUT)) # FIXME unused?
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self.addParameter(ParameterTableField(self.VALUE_FIELD,
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self.tr('Value field'), self.INPUT))
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self.addOutput(OutputHTML(self.OUTPUT, self.tr('Polar plot')))
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def name(self):
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return 'polarplot'
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def displayName(self):
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return self.tr('Polar plot')
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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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namefieldname = self.getParameterValue(self.NAME_FIELD) # NOQA FIXME unused?
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valuefieldname = self.getParameterValue(self.VALUE_FIELD)
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output = self.getOutputValue(self.OUTPUT)
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values = vector.values(layer, valuefieldname)
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data = [go.Area(r=values[valuefieldname],
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t=np.degrees(np.arange(0.0, 2 * np.pi, 2 * np.pi / len(values[valuefieldname]))))]
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plt.offline.plot(data, filename=output, auto_open=False)
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