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150 lines
6.1 KiB
Python
150 lines
6.1 KiB
Python
"""
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***************************************************************************
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EquivalentNumField.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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import warnings
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from qgis.core import (QgsProcessingParameterFeatureSource,
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QgsProcessingParameterField,
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QgsProcessingParameterFileDestination,
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QgsProcessingException,
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QgsProcessingParameterString)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.tools import vector
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from qgis.PyQt.QtCore import QCoreApplication
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class VectorLayerScatterplot3D(QgisAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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XFIELD = 'XFIELD'
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YFIELD = 'YFIELD'
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ZFIELD = 'ZFIELD'
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TITLE = 'TITLE'
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XAXIS_TITLE = "XAXIS_TITLE"
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YAXIS_TITLE = "YAXIS_TITLE"
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ZAXIS_TITLE = "ZAXIS_TITLE"
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def group(self):
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return self.tr('Plots')
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def groupId(self):
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return 'plots'
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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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.XFIELD,
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self.tr('X attribute'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric))
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self.addParameter(QgsProcessingParameterField(self.YFIELD,
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self.tr('Y attribute'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric))
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self.addParameter(QgsProcessingParameterField(self.ZFIELD,
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self.tr('Z attribute'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric))
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self.addParameter(QgsProcessingParameterString(
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self.TITLE,
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self.tr('Title'),
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optional=True))
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self.addParameter(QgsProcessingParameterString(
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self.XAXIS_TITLE,
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self.tr('Xaxis Title'),
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optional=True))
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self.addParameter(QgsProcessingParameterString(
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self.YAXIS_TITLE,
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self.tr('Yaxis Title'),
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optional=True))
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self.addParameter(QgsProcessingParameterString(
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self.ZAXIS_TITLE,
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self.tr('Zaxis Title'),
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optional=True))
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self.addParameter(QgsProcessingParameterFileDestination(self.OUTPUT, self.tr('Histogram'), self.tr('HTML files (*.html)')))
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def name(self):
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return 'scatter3dplot'
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def displayName(self):
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return self.tr('Vector layer scatterplot 3D')
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def processAlgorithm(self, parameters, context, feedback):
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try:
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# importing plotly throws Python warnings from within the library - filter these out
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with warnings.catch_warnings():
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warnings.filterwarnings("ignore", category=ResourceWarning)
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warnings.filterwarnings("ignore", category=ImportWarning)
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import plotly as plt
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import plotly.graph_objs as go
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except ImportError:
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raise QgsProcessingException(QCoreApplication.translate('VectorLayerScatterplot3D', 'This algorithm requires the Python “plotly” library. Please install this library and try again.'))
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source = self.parameterAsSource(parameters, self.INPUT, context)
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if source is None:
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raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
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xfieldname = self.parameterAsString(parameters, self.XFIELD, context)
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yfieldname = self.parameterAsString(parameters, self.YFIELD, context)
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zfieldname = self.parameterAsString(parameters, self.ZFIELD, context)
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title = self.parameterAsString(parameters, self.TITLE, context)
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xaxis_title = self.parameterAsString(parameters, self.XAXIS_TITLE, context)
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yaxis_title = self.parameterAsString(parameters, self.YAXIS_TITLE, context)
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zaxis_title = self.parameterAsString(parameters, self.ZAXIS_TITLE, context)
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if title.strip() == "": title = None
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if xaxis_title.strip() == "": xaxis_title = None
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if yaxis_title.strip() == "": yaxis_title = None
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if zaxis_title.strip() == "": zaxis_title = None
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output = self.parameterAsFileOutput(parameters, self.OUTPUT, context)
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values = vector.values(source, xfieldname, yfieldname, zfieldname)
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data = [go.Scatter3d(
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x=values[xfieldname],
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y=values[yfieldname],
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z=values[zfieldname],
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mode='markers')]
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fig = go.Figure(
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data=data,
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layout_title_text=title,
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layout_scene_xaxis_title=xaxis_title,
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layout_scene_yaxis_title=yaxis_title,
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layout_scene_zaxis_title=zaxis_title)
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fig.write_html(output)
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return {self.OUTPUT: output}
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