QGIS/python/plugins/processing/gui/RangePanel.py

# -*- coding: utf-8 -*-

"""
***************************************************************************
    RangePanel.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf 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.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os

from qgis.PyQt import uic
from qgis.PyQt.QtCore import pyqtSignal
from qgis.PyQt.QtWidgets import QDialog

from qgis.core import QgsProcessingParameterNumber

pluginPath = os.path.split(os.path.dirname(__file__))[0]
WIDGET, BASE = uic.loadUiType(
    os.path.join(pluginPath, 'ui', 'widgetRangeSelector.ui'))


class RangePanel(BASE, WIDGET):

    hasChanged = pyqtSignal()

    def __init__(self, param):
        super(RangePanel, self).__init__(None)
        self.setupUi(self)

        self.param = param
        # Integer or Double range
        if self.param.dataType() == QgsProcessingParameterNumber.Integer:
            self.spnMin.setDecimals(0)
            self.spnMax.setDecimals(0)

        if param.defaultValue() is not None:
            self.setValue(param.defaultValue())
            values = self.getValues()

        # Spin range logic
        self.spnMin.valueChanged.connect(lambda: self.setMinMax())
        self.spnMax.valueChanged.connect(lambda: self.setMaxMin())

    def setMinMax(self):
        values = self.getValues()
        if values[0] >= values[1]:
            self.spnMax.setValue(values[0])
            self.hasChanged.emit()

    def setMaxMin(self):
        values = self.getValues()
        if values[0] >= values[1]:
            self.spnMin.setValue(values[1])
            self.hasChanged.emit()

    def getValue(self):
        return '{},{}'.format(self.spnMin.value(), self.spnMax.value())

    def getValues(self):
        value = self.getValue()
        if value:
            return [float(a) for a in value.split(',')]

    def setValue(self, value):
        try:
            values = value.split(',')
            minVal = float(values[0])
            maxVal = float(values[1])
            self.spnMin.setValue(float(minVal))
            self.spnMax.setValue(float(maxVal))
        except:
            return