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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.
#
# ###########################################################################*/
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
__license__ = "MIT"
__date__ = "03/01/2019"
import functools
from silx.gui import qt
from ..utils import units
class UnitLabel(qt.QLabel):
"""QLabel displaying an unit.
"""
def __init__(self, parent):
super(UnitLabel, self).__init__(parent)
self.__unit = None
self.__model = None
self.__isUnitEditable = False
def setUnit(self, unit):
"""
Set the displayed unit.
:param pyFAI.gui.units.Unit unit: An unit
"""
if self.__unit is unit:
return
self.__unit = unit
if unit is None:
self.setText("")
self.setToolTip("No unit")
else:
self.setText(unit.symbol)
self.setToolTip(u"%s (%s)" % (unit.fullname, unit.symbol))
def getUnit(self):
"""
:rtype: pyFAI.gui.units.Unit
"""
return self.__unit
def setUnitModel(self, model):
"""
Set the model containing an unit.
:param pyFAI.gui.model.DataUnit.DataUnit: Model containing
the unit.
"""
if self.__model is not None:
self.__model.changed.disconnect(self.__unitChanged)
self.__model = model
if self.__model is not None:
self.__model.changed.connect(self.__unitChanged)
self.__unitChanged()
def __unitChanged(self):
if self.__model is None:
self.setUnit(None)
else:
self.setUnit(self.__model.value())
def getUnitModel(self):
"""
:rtype: pyFAI.gui.model.DataUnit.DataUnit
"""
return self.__model
def __popupUnitSelection(self, pos):
"""Display a popup list to allow to select a new unit"""
if self.__unit is None:
return
unitList = units.Unit.get_units(self.__unit.dimensionality)
if len(unitList) <= 1:
return
menu = qt.QMenu(self)
menu.addSection("Unit for %s" % self.__unit.dimensionality.fullname.lower())
for unit in unitList:
action = qt.QAction(menu)
text = u"%s: %s" % (unit.fullname, unit.symbol)
if unit is self.__unit:
text += " (current)"
action.setText(text)
action.triggered.connect(functools.partial(self.__unitSelected, unit))
menu.addAction(action)
menu.popup(pos)
def __unitSelected(self, unit):
model = self.getUnitModel()
if model is not None:
model.setValue(unit)
else:
self.setUnit(unit)
def mouseReleaseEvent(self, event):
if event.button() == qt.Qt.LeftButton and self.__isUnitEditable:
pos = event.pos()
pos = self.mapToGlobal(pos)
self.__popupUnitSelection(pos)
return
super(UnitLabel, self).mouseReleaseEvent(event)
def setUnitEditable(self, isUnitEditable):
self.__isUnitEditable = isUnitEditable
def isUnitEditable(self):
return self.__isUnitEditable
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