[PyQt] How to extract the value of a Qspinbox?

[Tayfun Kayhan]

what about  vbl.addWidget(self.tension)  ?


________________________________
 From: Fabien Lafont <lafont.fabien at gmail.com>
To: Tayfun Kayhan <tayfun92_kayhan at yahoo.com> 
Cc: "pyqt at riverbankcomputing.com" <pyqt at riverbankcomputing.com> 
Sent: Wednesday, January 4, 2012 6:04 PM
Subject: Re: [PyQt] How to extract the value of a Qspinbox?
 
Sorry, I should say it before but I've alreadt tryied this method:

it returns:

vbl.addWidget(tension)
NameError: global name 'tension' is not defined



2012/1/4 Tayfun Kayhan <tayfun92_kayhan at yahoo.com>:
> without the prefix 'self', tension is not an attribute of class, so it
> complaints this. you try replacing it with below :
>
> ...
> self.tension = QDoubleSpinBox()
> self.tension.valueChanged.connect(self.voltage)
> self.tension.setRange(0,100)
> ...
> ________________________________
> From: Fabien Lafont <lafont.fabien at gmail.com>
> To: pyqt at riverbankcomputing.com
> Sent: Wednesday, January 4, 2012 5:26 PM
> Subject: [PyQt] How to extract the value of a Qspinbox?
>
> I'm trying to extract the value of an QDoubleSpinBox but I can't
> understand why it does not work. It returns:
>
> levoltage = self.tension.value()
> AttributeError: 'ApplicationWindow' object has no attribute 'tension'
>
> Do you have any idea why? I'm just starting to learn PyQt :)
>
> My code:
>
>
>
>
> from visa import *
> from pylab import *
> import sys
> from PyQt4 import QtGui
> import numpy as np
> import random
> import ImageGrab
> from PyQt4 import QtCore, QtGui
> from matplotlib.figure import Figure
> from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as
> FigureCanvas
> from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg
> as NavigationToolbar
> from PyQt4.QtGui import (QApplication, QLabel, QLineEdit, QSpinBox,
> QDoubleSpinBox,
>         QVBoxLayout, QDial, QGridLayout, QComboBox, QPushButton)
> from PyQt4.QtCore import (QObject, Qt, SIGNAL, SLOT)
>
> class ApplicationWindow(QtGui.QMainWindow):
>     """Example main window"""
>     def __init__(self):
>         global lechemin
>         # initialization of Qt MainWindow widget
>         QtGui.QMainWindow.__init__(self)
>         # set window title
>         self.setWindowTitle("QHE manip")
>         # instantiate a widget, it will be the main one
>         self.main_widget = QtGui.QWidget(self)
>         # create a vertical box layout widget
>         vbl = QtGui.QVBoxLayout(self.main_widget)
>
>         # instantiate our Matplotlib canvas widget
>
>
> #===============================================================================
>
> #===============================================================================
>
>         chemin = QLineEdit("C://testfab.jpg")
> #        chemin.returnPressed.connect(self.sauvegarde)
>         self.connect(chemin, SIGNAL("returnPressed()"),
>                     self.sauvegarde)
> #        lechemin = unicode(chemin.text())
> #===============================================================================
>
>         tension = QDoubleSpinBox()
>         tension.valueChanged.connect(self.voltage)
>         tension.setRange(0,100)
>
>
> #===============================================================================
>
>         vbl.addWidget(chemin)
>         vbl.addWidget(tension)
>
>         # set the focus on the main widget
>         self.main_widget.setFocus()
>         # set the central widget of MainWindow to main_widget
>         self.setCentralWidget(self.main_widget)
>
>     def sauvegarde(self) :
>         global lechemin
>         lechemin = unicode(self.chemin.text())
>
>         print lechemin
>
>     def voltage(self) :
>         global levoltage
>         levoltage = self.tension.value()
>
> qApp = QtGui.QApplication(sys.argv)
> # instantiate the ApplicationWindow widget
> aw = ApplicationWindow()
> # show the widget
> aw.show()
> # start the Qt main loop execution, exiting from this script
> # with the same return code of Qt application
> sys.exit(qApp.exec_())
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.com
> http://www.riverbankcomputing.com/mailman/listinfo/pyqt
>
>
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