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#!/usr/bin/env python
#############################################################################
##
# This file is part of Taurus
##
# http://taurus-scada.org
##
# Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
# Taurus 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.
##
# Taurus 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 Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
"""
RawDataChooser.py: widget for importing RawData (from file or from a function)
"""
__all__ = ["QRawDataWidget"]
import numpy
from taurus.external.qt import Qt
from taurus.core.util.safeeval import SafeEvaluator
from taurus.qt.qtgui.util.ui import UILoadable
@UILoadable
class QRawDataWidget(Qt.QWidget):
ReadFromFiles = Qt.pyqtSignal(int, int)
AddCurve = Qt.pyqtSignal(dict)
def __init__(self, parent=None):
super(QRawDataWidget, self).__init__(parent)
self.loadUi()
# connecttions
self.openFilesBT.clicked.connect(self.onOpenFilesButtonClicked)
self.addCurveBT.clicked.connect(self.onAddCurveButtonClicked)
# set validators in LE's
self.xFromLE.setValidator(Qt.QDoubleValidator(self))
self.xToLE.setValidator(Qt.QDoubleValidator(self))
self.xStepLE.setValidator(Qt.QDoubleValidator(self))
def onOpenFilesButtonClicked(self):
""" Emit a ReadFromFiles signal with the selected xcol and skiprows as parameters"""
xcol = self.xcolSB.value()
if xcol == self.xcolSB.minimum():
xcol = None
skiprows = self.headerSB.value()
self.ReadFromFiles.emit(xcol, skiprows)
def onAddCurveButtonClicked(self):
""" Emit a AddCurve signal with a rawdata dictionary as a parameter.
The rawdata dictionary is prepared from the from the GUI's selection."""
rawdata = {}
if self.xRangeRB.isChecked():
rawdata['x'] = numpy.arange(float(self.xFromLE.text()), float(
self.xToLE.text()), float(self.xStepLE.text()))
else:
sev = SafeEvaluator()
try:
rawdata['x'] = sev.eval(str(self.xValuesLE.text()))
except:
Qt.QMessageBox.warning(
self, 'Invalid x values' 'Cannot interpret the x values.\n Use Python expressions like "[1, 3 , 67]" or "arange(100)")')
return
rawdata['f(x)'] = str(self.f_xLE.text())
self.AddCurve.emit(rawdata)
if __name__ == "__main__":
import sys
from taurus.qt.qtgui.application import TaurusApplication
app = TaurusApplication(sys.argv, cmd_line_parser=None)
form = QRawDataWidget()
form.show()
sys.exit(app.exec_())
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