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

[Fabien Lafont]

I'm stupid... thank you very much!

2012/1/4 Tayfun Kayhan <tayfun92_kayhan at yahoo.com>:
> 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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