def chooseSignals(self):
     Usignal=self.signalChoice1.currentText()
     Isignal=self.signalChoice2.currentText()
     Udata,Idata,time,self.sampling=readHdf5.getMultiData(self.fileName,Usignal,Isignal,self.env)
     self.Udata=np.array(Udata)
     self.Idata=np.array(Idata)
     self.time=np.array(time)
     self.Udata=self.Udata*20.
     self.Idata=-self.Idata*0.01
     self.p1.clear()
     self.p2.clear()
     self.p3.clear()
     self.p4.clear() 
     self.lr=pg.LinearRegionItem([self.l1,self.r1])
     self.lr.setZValue(-10)
     self.p1.addItem(self.lr)    
     self.lr.sigRegionChanged.connect(self.updatePlot)
     self.p1.plot(self.time,self.Idata)
     self.p2.plot(self.time,self.Idata)        
 def __init__(self,filename,env,parent=None):
      super(langmuirTime,self).__init__(parent)
      pg.setConfigOption('background', 'w')
      pg.setConfigOption('foreground', 'k')
      self.fileName=filename[0]
      self.setWindowTitle("langmuir time evolution")
      self.resize(1000,600)
      self.env=env
      self.p0=pg.PlotWidget()
      self.p0.setLabel('left', "Langmuir current (A)")
      self.p0.setLabel('bottom', "Time (s)")
      self.lr=pg.LinearRegionItem([2.,3.])
      self.lr.setZValue(-10)
      self.p0.addItem(self.lr)  
      self.Udata,self.Idata,self.time,self.sampling=readHdf5.getMultiData(self.fileName,'PXI M6251/Lang_I','PXI M6251/Lang_U',self.env)
      self.Udata=np.array(self.Udata)
      self.Idata=np.array(self.Idata)
      self.time=np.array(self.time)
      self.Udata=self.Udata*20.
      self.Idata=-self.Idata*0.01
      self.p0.plot(self.time,self.Idata)
      self.p1=pg.PlotWidget()
      self.p1.setLabel('left', "Plasma density (m^-3)")
      self.p1.setLabel('bottom', "Time (s)")     
      self.p2=pg.PlotWidget()
      self.p2.setLabel('left', "Plasma temperature (eV)")
      self.p2.setLabel('bottom', "Time (s)")  
      self.p3=pg.PlotWidget()
      self.p3.setLabel('left', "Potenials (V)")
      self.p3.setLabel('bottom', "Time (s)")  
      button0=QtGui.QPushButton('Start calculation')
      button0.clicked.connect(self.start)
      button1=QtGui.QPushButton('Save data')
      button1.clicked.connect(self.save)
      self.ramps=QtGui.QLineEdit('10')
      self.slots=QtGui.QLineEdit('50')
      self.gas=QtGui.QLineEdit('Helium')             
      self.tempT=QtGui.QLineEdit('')             
      self.freq=QtGui.QLineEdit('1000')
      formbox=QtGui.QFormLayout()
      formbox.addRow('Number of ramps : ',self.ramps)
      formbox.addRow('Number of time slots : ',self.slots)
      formbox.addRow('Gas : ',self.gas)
      formbox.addRow('Temperature (auto if empty): ',self.tempT)
      formbox.addRow('Sweep frequency: ',self.freq)
      form=QtGui.QFrame()
      form.setLayout(formbox)
      vbox2=QtGui.QVBoxLayout()         
      vbox2.addStretch(1)
      vbox2.addWidget(form)
      vbox2.addWidget(button0)
      vbox2.addWidget(button1)
      vbox1=QtGui.QVBoxLayout()         
      vbox1.addStretch(1)
      vbox1.addWidget(self.p0)
      vbox1.addWidget(self.p1)
      vbox1.addWidget(self.p2)
      vbox1.addWidget(self.p3)         
      frame1=QtGui.QFrame()
      frame1.setLayout(vbox1)
      frame2=QtGui.QFrame()
      frame2.setLayout(vbox2)
      splitterH=QtGui.QSplitter(QtCore.Qt.Horizontal,self)
      splitterH.addWidget(frame1)
      splitterH.addWidget(frame2)
      self.setCentralWidget(splitterH)
      self.show()