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# coding: utf-8
# /*##########################################################################
#
# Copyright (C) 2016-2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "16/10/2020"
from silx.gui import qt
from ..model.DataModel import DataModel
from ...utils import stringutil
class UnitSelector(qt.QComboBox):
def __init__(self, parent=None):
super(UnitSelector, self).__init__(parent)
self.__model = None
self.setModel(DataModel())
self.currentIndexChanged[int].connect(self.__currentIndexChanged)
self.__shortName = False
def setShortNameDisplay(self, shortName):
if self.__shortName == shortName:
return
self.__shortName = shortName
units = self.units()
self.setUnits(units)
def units(self):
units = []
for index in range(self.count()):
unit = self.itemData(index)
units.append(unit)
return units
def setUnits(self, units):
previousUnit = self.__model.value()
old = self.blockSignals(True)
# clean up
self.clear()
units = sorted(list(units), key=lambda u: u.label)
for unit in units:
if self.__shortName:
name = stringutil.latex_to_unicode(unit.short_name)
symbol = unit.unit_symbol
if symbol == "?":
label = name
else:
symbol = stringutil.latex_to_unicode(unit.unit_symbol)
label = "%s (%s)" % (name, symbol)
else:
label = stringutil.latex_to_unicode(unit.label)
self.addItem(label, unit)
# try to find the previous unit in the new list
if previousUnit is None:
currentIndex = self.currentIndex()
index = -1
else:
currentIndex = self.currentIndex()
index = self.findUnit(previousUnit)
if index == -1:
self.blockSignals(old)
if currentIndex != index:
# the previous selected unit is not anymore available
self.setCurrentIndex(index)
else:
# the previous index is found
# we dont have to emit signals
self.setCurrentIndex(index)
self.blockSignals(old)
def __currentIndexChanged(self, index):
model = self.model()
if model is None:
return
unit = self.itemData(index)
old = self.blockSignals(True)
model.setValue(unit)
self.blockSignals(old)
def setModel(self, model):
if self.__model is not None:
self.__model.changed.disconnect(self.__modelChanged)
self.__model = model
if self.__model is not None:
self.__model.changed.connect(self.__modelChanged)
self.__modelChanged()
def findUnit(self, unit):
"""Returns the first index containing the requested detector.
Else return -1"""
for index in range(self.count()):
item = self.itemData(index)
if item is unit:
return index
return -1
def __modelChanged(self):
value = self.__model.value()
if value is None:
self.setCurrentIndex(-1)
else:
unit = value
index = self.currentIndex()
item = self.itemData(index)
if item is not unit:
# findData is not working
index = self.findUnit(unit)
self.setCurrentIndex(index)
def model(self):
return self.__model
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