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settings.py
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settings.py
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"""
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import os
from geographiclib.geodesic import Geodesic
from qgis.PyQt import uic
from qgis.PyQt.QtCore import Qt, QSettings, QCoreApplication
from qgis.PyQt.QtWidgets import QDialog
from qgis.PyQt.QtGui import QColor
from qgis.core import QgsCoordinateReferenceSystem, QgsEllipsoidUtils
epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
geod = Geodesic.WGS84
FORM_CLASS, _ = uic.loadUiType(os.path.join(
os.path.dirname(__file__), 'ui/settings.ui'))
def tr(string):
return QCoreApplication.translate('Processing', string)
historical_ellipsoids = {
'165': ['165', 6378165.000, 298.3],
'ans': ['ANS', 6378160, 298.25],
'clrk58': ['CLARKE 1858', 6378293.645, 294.26],
'intl24': ['International 1924', 6378388, 297],
}
class Ellipsoids():
acronymList = {}
def __init__(self):
# This returns the acronym, description, & parameters
definitions = QgsEllipsoidUtils.definitions()
# Create a dictionary of definitions keyed on the acronym
for item in definitions:
self.acronymList[item.acronym] = item
def ellipsoidDescription(self, acronym):
'''Return an acronym's description'''
if acronym == 'WGS84':
return('WGS 84')
elif acronym in self.acronymList:
return(self.acronymList[acronym].description)
elif acronym in historical_ellipsoids:
return(historical_ellipsoids[acronym][0])
else:
return(None)
def valid(self, acronym):
'''Check for a valid acronym'''
if acronym == 'WGS84':
return(True)
elif acronym in self.acronymList:
return(True)
elif acronym in historical_ellipsoids:
return(True)
else:
return(False)
def isSystemEllipsoid(self, acronym):
if acronym in self.acronymList:
return(True)
return(False)
def isHistoricalEllipsoid(self, acronym):
if acronym in historical_ellipsoids:
return(True)
return(False)
def ellipsoid(self, acronym):
'''Return the ellipsoid associated with the acronym'''
if acronym == 'WGS84':
return (Geodesic.WGS84)
elif acronym in self.acronymList:
param = self.acronymList[acronym].parameters
return(Geodesic(param.semiMajor, 1.0 / param.inverseFlattening))
elif acronym in historical_ellipsoids:
return(Geodesic(historical_ellipsoids[acronym][1], 1.0 / historical_ellipsoids[acronym][2]))
else:
return(None)
ellipsoids = Ellipsoids()
class Settings():
def __init__(self):
self.readSettings()
def readSettings(self):
'''Load the user selected settings. The settings are retained even when
the user quits QGIS.'''
qset = QSettings()
self.geomXName = qset.value('/ShapeTools/GeomXName', 'geom_x')
self.geomYName = qset.value('/ShapeTools/GeomYName', 'geom_y')
self.maxSegLength = float(qset.value('/ShapeTools/MaxSegLength', 20.0)) # In km
self.maxSegments = int(qset.value('/ShapeTools/MaxSegments', 1000))
self.mtAzMode = int(qset.value('/ShapeTools/MtAzMode', 0))
self.measureSignificantDigits = int(qset.value('/ShapeTools/MeasureSignificantDigits', 2))
self.saveToLayerSignificantDigits = int(qset.value('/ShapeTools/SaveToLayerSignificantDigits', 2))
self.compassResolution = int(qset.value('/ShapeTools/CompassResolution', 0))
color = qset.value('/ShapeTools/RubberBandColor', '#dea743')
self.rubberBandColor = QColor(color)
value = int(qset.value('/ShapeTools/RubberBandOpacity', 192))
self.rubberBandColor.setAlpha(value)
color = qset.value('/ShapeTools/MeasureLineColor', '#000000')
self.measureLineColor = QColor(color)
color = qset.value('/ShapeTools/MeasureTextColor', '#000000')
self.measureTextColor = QColor(color)
acronym = qset.value('/ShapeTools/Ellipsoid', 'WGS84')
self.setEllipsoid(acronym)
def getUniqueAttributeName(self, newname, names=[]):
index = 1
names = set(names)
name = newname
while name in names:
name = '{}{}'.format(newname, index)
index += 1
return (name)
def getGeomNames(self, names=[]):
index = 1
name_x = self.geomXName
names = set(names)
while name_x in names:
name_x = '{}{}'.format(self.geomXName, index)
index += 1
name_y = self.geomYName
while name_y in names:
name_y = '{}{}'.format(self.geomYName, index)
index += 1
return (name_x, name_y)
def setEllipsoid(self, acronym):
if not ellipsoids.valid(acronym):
acronym = 'WGS84'
self.ellipseAcronym = acronym
self.ellipseDescription = ellipsoids.ellipsoidDescription(acronym)
settings = Settings()
class SettingsWidget(QDialog, FORM_CLASS):
'''Settings Dialog box.'''
def __init__(self, iface, parent):
super(SettingsWidget, self).__init__(parent)
self.setupUi(self)
self.iface = iface
ellipseDef = QgsEllipsoidUtils.definitions()
self.wgs84index = 0
for i, item in enumerate(ellipseDef):
desc = item.description
if item.description != item.acronym:
desc += " (" + item.acronym + ")"
self.systemEllipsoidComboBox.addItem(desc, item.acronym)
if item.acronym == 'WGS84':
self.wgs84index = i
for key in historical_ellipsoids.keys():
desc = historical_ellipsoids[key][0]
self.historicalEllipsoidComboBox.addItem(desc, key)
self.mtAzComboBox.addItems([tr('Azimuth Range -180 to 180'), tr('Azimuth Range 0 tp 360')])
self.ellipsoidComboBox.addItems(['WGS84', tr('System Ellipsoids'), tr('Historical Ellipsoids')])
self.ellipsoidComboBox.activated.connect(self.initEllipsoid)
self.rubberBandColorButton.setAllowOpacity(True)
settings.readSettings()
if settings.ellipseAcronym == 'WGS84':
self.ellipsoidComboBox.setCurrentIndex(0)
elif ellipsoids.isSystemEllipsoid(settings.ellipseAcronym):
self.ellipsoidComboBox.setCurrentIndex(1)
else:
self.ellipsoidComboBox.setCurrentIndex(2)
self.initEllipsoid()
def initEllipsoid(self):
if self.ellipsoidComboBox.currentIndex() == 0: # WGS84
self.systemEllipsoidComboBox.setCurrentIndex(self.wgs84index)
self.systemEllipsoidComboBox.setEnabled(False)
self.historicalEllipsoidComboBox.setEnabled(False)
elif self.ellipsoidComboBox.currentIndex() == 2: # Historical Ellipsoids
index = self.historicalEllipsoidComboBox.findData(settings.ellipseAcronym, flags=Qt.MatchExactly)
if index == -1:
index = 0
self.historicalEllipsoidComboBox.setCurrentIndex(index)
self.systemEllipsoidComboBox.setEnabled(False)
self.historicalEllipsoidComboBox.setEnabled(True)
else: # System Ellipsoids
index = self.systemEllipsoidComboBox.findData(settings.ellipseAcronym, flags=Qt.MatchExactly)
if index == -1:
settings.setEllipsoid('WGS84')
index = self.wgs84index
self.systemEllipsoidComboBox.setCurrentIndex(index)
self.systemEllipsoidComboBox.setEnabled(True)
self.historicalEllipsoidComboBox.setEnabled(False)
def accept(self):
'''Accept the settings and save them for next time.'''
qset = QSettings()
name = self.xColumnNameLineEdit.text()
if name == '':
name = 'geom_x'
qset.setValue('/ShapeTools/GeomXName', name)
name = self.yColumnNameLineEdit.text()
if name == '':
name = 'geom_y'
qset.setValue('/ShapeTools/GeomYName', name)
qset.setValue('/ShapeTools/MaxSegments', self.maxSegmentsSpinBox.value())
qset.setValue('/ShapeTools/MaxSegLength', self.segLengthSpinBox.value())
qset.setValue('/ShapeTools/MtAzMode', self.mtAzComboBox.currentIndex())
# the ellipsoid combobox has the descriptions and not the acronym
# we have put the acronymns in the data field
if self.ellipsoidComboBox.currentIndex() == 0:
name = 'WGS84'
elif self.ellipsoidComboBox.currentIndex() == 2: # Historical ellipsoids
index = self.historicalEllipsoidComboBox.currentIndex()
name = self.historicalEllipsoidComboBox.itemData(index)
else:
index = self.systemEllipsoidComboBox.currentIndex()
name = self.systemEllipsoidComboBox.itemData(index)
qset.setValue('/ShapeTools/Ellipsoid', name)
settings.compassResolution = self.compassComboBox.currentIndex()
qset.setValue('/ShapeTools/CompassResolution', settings.compassResolution)
settings.rubberBandColor = self.rubberBandColorButton.color()
settings.measureLineColor = self.measureLineColorButton.color()
settings.measureTextColor = self.measureTextColorButton.color()
qset.setValue('/ShapeTools/RubberBandColor', settings.rubberBandColor.name())
qset.setValue('/ShapeTools/RubberBandOpacity', settings.rubberBandColor.alpha())
qset.setValue('/ShapeTools/MeasureLineColor', settings.measureLineColor.name())
qset.setValue('/ShapeTools/MeasureTextColor', settings.measureTextColor.name())
qset.setValue('/ShapeTools/MeasureSignificantDigits', self.significantDigitsSpinBox.value())
qset.setValue('/ShapeTools/SaveToLayerSignificantDigits', self.saveToLayerSignificantDigitsSpinBox.value())
settings.readSettings()
self.close()
def showEvent(self, e):
'''The user has selected the settings dialog box so we need to
read the settings and update the dialog box with the previously
selected settings.'''
settings.readSettings()
self.xColumnNameLineEdit.setText(settings.geomXName)
self.yColumnNameLineEdit.setText(settings.geomYName)
self.maxSegmentsSpinBox.setValue(settings.maxSegments)
self.segLengthSpinBox.setValue(settings.maxSegLength)
self.significantDigitsSpinBox.setValue(settings.measureSignificantDigits)
self.saveToLayerSignificantDigitsSpinBox.setValue(settings.saveToLayerSignificantDigits)
self.compassComboBox.setCurrentIndex(settings.compassResolution)
self.mtAzComboBox.setCurrentIndex(settings.mtAzMode)
self.rubberBandColorButton.setColor(settings.rubberBandColor)
self.measureLineColorButton.setColor(settings.measureLineColor)
self.measureTextColorButton.setColor(settings.measureTextColor)
self.ellipsoidComboBox.blockSignals(True)
self.ellipsoidComboBox.blockSignals(False)
self.initEllipsoid()