######################################################################################################################
# Copyright (C) 2017-2019 Spine project consortium
# This file is part of Spine Toolbox.
# Spine Toolbox is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General
# Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option)
# any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
# Public License for more details. You should have received a copy of the GNU Lesser General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
######################################################################################################################
"""
An editor widget for editing plain number database (relationship) parameter values.
:author: A. Soininen (VTT)
:date: 28.6.2019
"""
from PySide2.QtCore import Slot
from PySide2.QtWidgets import QWidget
from ui.plain_parameter_value_editor import Ui_PlainParameterValueEditor
[docs]class _ValueModel:
"""
A model to handle the parameter value in the editor.
Mostly useful because of the handy conversion of strings to floats or booleans.
Attributes:
value (float, bool): a parameter value
"""
def __init__(self, value):
self._value = value
@property
[docs] def value(self):
"""Returns the value held by the model."""
return self._value
@value.setter
def value(self, value):
"""Converts a value string to float or boolean."""
try:
self._value = float(value)
except ValueError:
value = value.strip().lower()
if value == 'true':
self._value = True
elif value == 'false':
self._value = False
else:
raise
[docs]class PlainParameterValueEditor(QWidget):
"""
A widget to edit float or boolean type parameter values.
Attributes:
parent_widget (QWidget): a parent widget
"""
def __init__(self, parent_widget=None):
super().__init__(parent_widget)
self._ui = Ui_PlainParameterValueEditor()
self._ui.setupUi(self)
self._ui.value_edit.editingFinished.connect(self._value_changed)
self._model = _ValueModel(0.0)
self._ui.value_edit.setText(str(self._model.value))
[docs] def set_value(self, value):
"""Sets the value to be edited in this widget."""
if not isinstance(value, (int, float, bool)):
value = 0.0
self._model = _ValueModel(value)
self._ui.value_edit.setText(str(value))
@Slot(name="_value_changed")
[docs] def _value_changed(self):
"""Updates the model."""
new_value = self._ui.value_edit.text()
if new_value:
try:
self._model.value = new_value
except ValueError:
self._ui.value_edit.setText(str(self._model.value))
return
[docs] def value(self):
"""Returns the value currently being edited."""
return self._model.value