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how to set the display of the form by pressing the button from the toolbar in Pyqt5 or PyQt4

For example When I open the app to show me one form, when I click the button show second form that will contain the data entry fields
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Second form

There are several ways to achieve what you want. Easiest (not cleanest) is to group the widgets in your "forms" into containers (QFrame, QGroupbox, etc) and connect the triggered signal from your actions into suitable slots that hide/show these containers. Below you can see an example (PySide) of this, on which I'm using two QFrames in order to separate your "forms". The layout behaviour can be modified easily.
The form file (compiled from the designer's ui file):
# Form implementation generated from reading ui file 'example.ui'
#
# Created: Tue Apr 10 13:18:07 2018
# by: pyside-uic 0.2.15 running on PySide 1.2.4
#
# WARNING! All changes made in this file will be lost!
from PySide import QtCore, QtGui
class Ui_Example(object):
def setupUi(self, Example):
Example.setObjectName("Example")
Example.resize(800, 770)
self.centralwidget = QtGui.QWidget(Example)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtGui.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.fr_one = QtGui.QFrame(self.centralwidget)
self.fr_one.setFrameShape(QtGui.QFrame.StyledPanel)
self.fr_one.setFrameShadow(QtGui.QFrame.Raised)
self.fr_one.setObjectName("fr_one")
self.verticalLayout_2 = QtGui.QVBoxLayout(self.fr_one)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.bt_quit = QtGui.QPushButton(self.fr_one)
self.bt_quit.setObjectName("bt_quit")
self.verticalLayout_2.addWidget(self.bt_quit)
self.cb_selection = QtGui.QComboBox(self.fr_one)
self.cb_selection.setObjectName("cb_selection")
self.verticalLayout_2.addWidget(self.cb_selection)
spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
self.verticalLayout_2.addItem(spacerItem)
self.gridLayout.addWidget(self.fr_one, 0, 0, 1, 1)
self.fr_two = QtGui.QFrame(self.centralwidget)
self.fr_two.setFrameShape(QtGui.QFrame.StyledPanel)
self.fr_two.setFrameShadow(QtGui.QFrame.Raised)
self.fr_two.setObjectName("fr_two")
self.verticalLayout_5 = QtGui.QVBoxLayout(self.fr_two)
self.verticalLayout_5.setObjectName("verticalLayout_5")
self.verticalLayout = QtGui.QVBoxLayout()
self.verticalLayout.setSpacing(0)
self.verticalLayout.setObjectName("verticalLayout")
self.label = QtGui.QLabel(self.fr_two)
self.label.setObjectName("label")
self.verticalLayout.addWidget(self.label)
self.le_fname = QtGui.QLineEdit(self.fr_two)
self.le_fname.setObjectName("le_fname")
self.verticalLayout.addWidget(self.le_fname)
self.verticalLayout_5.addLayout(self.verticalLayout)
self.verticalLayout_3 = QtGui.QVBoxLayout()
self.verticalLayout_3.setSpacing(0)
self.verticalLayout_3.setObjectName("verticalLayout_3")
self.label_2 = QtGui.QLabel(self.fr_two)
self.label_2.setObjectName("label_2")
self.verticalLayout_3.addWidget(self.label_2)
self.le_sname = QtGui.QLineEdit(self.fr_two)
self.le_sname.setObjectName("le_sname")
self.verticalLayout_3.addWidget(self.le_sname)
self.verticalLayout_5.addLayout(self.verticalLayout_3)
self.verticalLayout_4 = QtGui.QVBoxLayout()
self.verticalLayout_4.setSpacing(0)
self.verticalLayout_4.setObjectName("verticalLayout_4")
self.label_3 = QtGui.QLabel(self.fr_two)
self.label_3.setObjectName("label_3")
self.verticalLayout_4.addWidget(self.label_3)
self.le_address = QtGui.QLineEdit(self.fr_two)
self.le_address.setObjectName("le_address")
self.verticalLayout_4.addWidget(self.le_address)
self.verticalLayout_5.addLayout(self.verticalLayout_4)
spacerItem1 = QtGui.QSpacerItem(20, 267, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
self.verticalLayout_5.addItem(spacerItem1)
self.gridLayout.addWidget(self.fr_two, 0, 1, 1, 1)
Example.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(Example)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 47))
self.menubar.setObjectName("menubar")
Example.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(Example)
self.statusbar.setObjectName("statusbar")
Example.setStatusBar(self.statusbar)
self.toolBar = QtGui.QToolBar(Example)
self.toolBar.setObjectName("toolBar")
Example.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar)
self.actionAction1 = QtGui.QAction(Example)
self.actionAction1.setObjectName("actionAction1")
self.actionAction2 = QtGui.QAction(Example)
self.actionAction2.setObjectName("actionAction2")
self.toolBar.addAction(self.actionAction1)
self.toolBar.addAction(self.actionAction2)
self.retranslateUi(Example)
QtCore.QMetaObject.connectSlotsByName(Example)
def retranslateUi(self, Example):
Example.setWindowTitle(QtGui.QApplication.translate("Example", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
self.bt_quit.setText(QtGui.QApplication.translate("Example", "Quit", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("Example", "First name", None, QtGui.QApplication.UnicodeUTF8))
self.label_2.setText(QtGui.QApplication.translate("Example", "Second name", None, QtGui.QApplication.UnicodeUTF8))
self.label_3.setText(QtGui.QApplication.translate("Example", "Address", None, QtGui.QApplication.UnicodeUTF8))
self.toolBar.setWindowTitle(QtGui.QApplication.translate("Example", "toolBar", None, QtGui.QApplication.UnicodeUTF8))
self.actionAction1.setText(QtGui.QApplication.translate("Example", "action1", None, QtGui.QApplication.UnicodeUTF8))
self.actionAction2.setText(QtGui.QApplication.translate("Example", "action2", None, QtGui.QApplication.UnicodeUTF8))
The main file:
from PySide import QtGui, QtCore
from _example import Ui_Example
class Example(QtGui.QMainWindow):
def __init__(self, parent = None):
super(Example, self).__init__(parent)
self.ui = Ui_Example()
self.ui.setupUi(self)
self.ui.fr_two.setVisible(False)
self.ui.cb_selection.addItem("motif")
# here are the connections of the corresponding actions on the QToolBar
self.ui.actionAction1.triggered.connect(self._changeView1)
self.ui.actionAction2.triggered.connect(self._changeView2)
def _changeView1(self):
# fr_one is the first frame (the one that contains the 'quit' button and the QCombobox)
# fr_two is the second frame (the one that contains the QLineEdits)
self.ui.fr_one.setVisible(True)
self.ui.fr_two.setVisible(False)
def _changeView2(self):
self.ui.fr_one.setVisible(False)
self.ui.fr_two.setVisible(True)
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
ex = Example()
ex.show()
app.exec_()

stackedWidget using pyqt

Im new at Python, QT4 and pyqt and I can't get the widgets to change using setCurrentIndex. I'm sure I am not using it correctly, but here's my initial code. First is the pyqt code:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'mainwindow.ui'
#
# Created: Thu May 5 17:15:28 2016
# by: PyQt4 UI code generator 4.9.3
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(400, 300)
self.centralWidget = QtGui.QWidget(MainWindow)
self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
self.stackedWidget = QtGui.QStackedWidget(self.centralWidget)
self.stackedWidget.setGeometry(QtCore.QRect(-41, -41, 451, 311))
self.stackedWidget.setObjectName(_fromUtf8("stackedWidget"))
self.page = QtGui.QWidget()
self.page.setObjectName(_fromUtf8("page"))
self.label = QtGui.QLabel(self.page)
self.label.setGeometry(QtCore.QRect(180, 70, 50, 16))
self.label.setObjectName(_fromUtf8("label"))
self.pushButton = QtGui.QPushButton(self.page)
self.pushButton.setGeometry(QtCore.QRect(170, 140, 80, 27))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.stackedWidget.addWidget(self.page)
self.page_2 = QtGui.QWidget()
self.page_2.setObjectName(_fromUtf8("page_2"))
self.label_2 = QtGui.QLabel(self.page_2)
self.label_2.setGeometry(QtCore.QRect(200, 90, 50, 16))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.stackedWidget.addWidget(self.page_2)
MainWindow.setCentralWidget(self.centralWidget)
self.retranslateUi(MainWindow)
self.stackedWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("MainWindow", "Page 1", None, QtGui.QApplication.UnicodeUTF8))
self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Go to 2", None, QtGui.QApplication.UnicodeUTF8))
self.label_2.setText(QtGui.QApplication.translate("MainWindow", "Page 2", None, QtGui.QApplication.UnicodeUTF8))
And here is the code I'm trying:
import sys
from form import *
class MyDialog(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.pushButton.clicked.connect(self.Change)
def Change(self):
self.stackedWidget.setCurrentIndex(1)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = MyDialog()
myapp.show()
sys.exit(app.exec_())
When I push my button, I get the error"'MyDialog' object has no attribute 'stackedWidget'.
I'm sure this is easy to the experienced programmer.

The error message means exactly what it says: MyDialog doesn't create a member variable named self.stackedWidget, but it tries to access such a variable in Change, so an AttributeError is raised when you click the button. The variable you want is a member of self.ui, which is an instance of UI_MainWindow.
The solution is to change the method Change to:
def Change(self):
self.ui.stackedWidget.setCurrentIndex(1)

PyQT4: getting text from Ui for existing python program

I'm trying to create a UI for an existing python program that I've made.
On the widget, I have two text boxes (QlineEdit) that I want to use to get the information for the program to use, a button and a textbrowser that will hold the output of the program.
I've stumbled upon PyQT4, which I installed using homebrew, and QT Creator. I've created the UI and converted it from a mainwindow.ui to a mainwindow.py and now I'm trying to figure out how to get the text input from the UI text boxes and have the program use it.
I cant figure out how to extract the text from the text boxes(QlineEdit) and store them in variables(strings) that the program can then use.
From my understanding, I should create a new .py file and import mainwindow as well as PyQT4.QtCore and PyQT4.QtGui. I dont know where to go from here so any insight would be helpful.
Also, how can I have the program print out to the textbrowser?
Maybe my approach is flawed and I should rebuild my program around the mainwindow.py file?
I apologize if this is all trivial information but I've never used PyQT or Qt creator.
Here is the code that I got from the the converted .ui to .py:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'mainwindow.ui'
#
# Created: Wed Aug 13 15:25:22 2014
# by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(480, 385)
MainWindow.setWindowOpacity(1.0)
self.centralWidget = QtGui.QWidget(MainWindow)
self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
self.textBrowser = QtGui.QTextBrowser(self.centralWidget)
self.textBrowser.setGeometry(QtCore.QRect(100, 120, 256, 192))
self.textBrowser.setObjectName(_fromUtf8("textBrowser"))
self.widget = QtGui.QWidget(self.centralWidget)
self.widget.setGeometry(QtCore.QRect(150, 10, 156, 97))
self.widget.setObjectName(_fromUtf8("widget"))
self.verticalLayout_2 = QtGui.QVBoxLayout(self.widget)
self.verticalLayout_2.setMargin(0)
self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
self.verticalLayout = QtGui.QVBoxLayout()
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.lineEdit = QtGui.QLineEdit(self.widget)
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.verticalLayout.addWidget(self.lineEdit)
self.lineEdit_2 = QtGui.QLineEdit(self.widget)
self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
self.verticalLayout.addWidget(self.lineEdit_2)
self.verticalLayout_2.addLayout(self.verticalLayout)
self.pushButton = QtGui.QPushButton(self.widget)
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.verticalLayout_2.addWidget(self.pushButton)
MainWindow.setCentralWidget(self.centralWidget)
self.menuBar = QtGui.QMenuBar(MainWindow)
self.menuBar.setGeometry(QtCore.QRect(0, 0, 480, 22))
self.menuBar.setObjectName(_fromUtf8("menuBar"))
MainWindow.setMenuBar(self.menuBar)
self.mainToolBar = QtGui.QToolBar(MainWindow)
self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
self.statusBar = QtGui.QStatusBar(MainWindow)
self.statusBar.setObjectName(_fromUtf8("statusBar"))
MainWindow.setStatusBar(self.statusBar)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.lineEdit.setText)
QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.lineEdit_2.setText)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.lineEdit.setPlaceholderText(_translate("MainWindow", "Enter Case Number", None))
self.lineEdit_2.setPlaceholderText(_translate("MainWindow", "Number of cases", None))
self.pushButton.setText(_translate("MainWindow", "Submit", None))
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Any information helps. Thanks

The way UI works is that the UI forms the main loop of the program. Here mainwindow.py is your main loop. You can import your classes that you created in your program (lets call it code.py) or just paste that code into you mainwindow.py. Then on button press or some other kind of event, you can call a function that execute the main code of your code.py
To answer your other questions regarding how to use the text and print to the textbrowser try something like this:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'mainwindow.ui'
#
# Created: Wed Aug 13 15:25:22 2014
# by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(480, 385)
MainWindow.setWindowOpacity(1.0)
self.centralWidget = QtGui.QWidget(MainWindow)
self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
self.textBrowser = QtGui.QTextBrowser(self.centralWidget)
self.textBrowser.setGeometry(QtCore.QRect(100, 120, 256, 192))
self.textBrowser.setObjectName(_fromUtf8("textBrowser"))
self.widget = QtGui.QWidget(self.centralWidget)
self.widget.setGeometry(QtCore.QRect(150, 10, 156, 97))
self.widget.setObjectName(_fromUtf8("widget"))
self.verticalLayout_2 = QtGui.QVBoxLayout(self.widget)
self.verticalLayout_2.setMargin(0)
self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
self.verticalLayout = QtGui.QVBoxLayout()
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.lineEdit = QtGui.QLineEdit(self.widget)
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.verticalLayout.addWidget(self.lineEdit)
self.lineEdit_2 = QtGui.QLineEdit(self.widget)
self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
self.verticalLayout.addWidget(self.lineEdit_2)
self.verticalLayout_2.addLayout(self.verticalLayout)
self.pushButton = QtGui.QPushButton(self.widget)
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.verticalLayout_2.addWidget(self.pushButton)
MainWindow.setCentralWidget(self.centralWidget)
self.menuBar = QtGui.QMenuBar(MainWindow)
self.menuBar.setGeometry(QtCore.QRect(0, 0, 480, 22))
self.menuBar.setObjectName(_fromUtf8("menuBar"))
MainWindow.setMenuBar(self.menuBar)
self.mainToolBar = QtGui.QToolBar(MainWindow)
self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
self.statusBar = QtGui.QStatusBar(MainWindow)
self.statusBar.setObjectName(_fromUtf8("statusBar"))
MainWindow.setStatusBar(self.statusBar)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.lineEdit.setText)
QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.lineEdit_2.setText)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.lineEdit.setPlaceholderText(_translate("MainWindow", "Enter Case Number", None))
self.lineEdit_2.setPlaceholderText(_translate("MainWindow", "Number of cases", None))
self.pushButton.setText(_translate("MainWindow", "Submit", None))
# Call a function when the button "Submit" is pressed
self.pushButton.clicked.connect(self.OnSubmit)
def OnSubmit(self):
# On submit do the necessary
# here I take the text from the LineEdits that you have
# (ie your Case Number, and number of Cases)
# and print them to the textbrowser below
text = self.lineEdit.text() + ' ' + self.lineEdit_2.text()
self.textBrowser.append(text)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
You can find some basic tutorials here: http://zetcode.com/gui/pyqt4/ that can help you understand the properties of your QtGui objects.

I try to use QFileDialog for choose a file on PyQt but it don't run

I'm new on stackoverflow.
I have a MainWindow on PyQt, I want click a button and open a QFileDialog for choose a file. The problem is: If I use a MainWindow, QFileDialog don't run. If I use a Dialog, QFileDialog run.
This is my code for the MainWindow.
import sys
from Import_fsa import import_fsa
from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import QFileDialog
from Vannucci_Gemignani import Ui_MainWindow
class GUI_fsa(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.ui=Ui_MainWindow()
self.ui.setupUi(self)
QtCore.QObject.connect(self.ui.Button_Browse, QtCore.SIGNAL('clicked()'), self.Browse)
def Browse(self):
fname=QFileDialog.getOpenFileName()
self.lineEdit.setText(fname)
data_set=import_fsa(fname)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
This is the code for Dialog. Here I write the code in the .py generate using pyuic4 (QTDesigner)
from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import QFileDialog
from ab1 import ABIFReader
import pylab
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(508, 363)
self.pushButton = QtGui.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(10, 40, 75, 23))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.lineEdit = QtGui.QLineEdit(Dialog)
self.lineEdit.setGeometry(QtCore.QRect(110, 40, 361, 20))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL('clicked()'), self.selectFile)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(QtGui.QApplication.translate("Dialog", "Dialog", None, QtGui.QApplication.UnicodeUTF8))
self.pushButton.setText(QtGui.QApplication.translate("Dialog", "PushButton", None, QtGui.QApplication.UnicodeUTF8))
def selectFile(self):
fname=QFileDialog.getOpenFileName()
self.lineEdit.setText(fname)
reader=ABIFReader(fname)
dati=reader.getData('DATA',1)
pylab.plot(dati)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
Dialog = QtGui.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
This is Vannucci_Gemignani.py:
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(1445, 744)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.gridLayoutWidget = QtGui.QWidget(self.centralwidget)
self.gridLayoutWidget.setGeometry(QtCore.QRect(10, 10, 771, 83))
self.gridLayoutWidget.setObjectName(_fromUtf8("gridLayoutWidget"))
self.gridLayout = QtGui.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setMargin(0)
self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
self.Button_Browse = QtGui.QPushButton(self.gridLayoutWidget)
self.Button_Browse.setObjectName(_fromUtf8("Button_Browse"))
self.gridLayout.addWidget(self.Button_Browse, 0, 0, 1, 1)
self.Button_Plot = QtGui.QPushButton(self.gridLayoutWidget)
self.Button_Plot.setObjectName(_fromUtf8("Button_Plot"))
self.gridLayout.addWidget(self.Button_Plot, 1, 0, 1, 1)
self.lineEdit = QtGui.QLineEdit(self.gridLayoutWidget)
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
self.Button_Clear = QtGui.QPushButton(self.gridLayoutWidget)
self.Button_Clear.setObjectName(_fromUtf8("Button_Clear"))
self.gridLayout.addWidget(self.Button_Clear, 2, 0, 1, 1)
self.label = QtGui.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(20, 130, 61, 31))
self.label.setObjectName(_fromUtf8("label"))
self.label_2 = QtGui.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(700, 130, 61, 31))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.label_3 = QtGui.QLabel(self.centralwidget)
self.label_3.setGeometry(QtCore.QRect(20, 430, 61, 31))
self.label_3.setObjectName(_fromUtf8("label_3"))
self.label_4 = QtGui.QLabel(self.centralwidget)
self.label_4.setGeometry(QtCore.QRect(700, 430, 61, 31))
self.label_4.setObjectName(_fromUtf8("label_4"))
self.widget = matplotlibWidget(self.centralwidget)
self.widget.setGeometry(QtCore.QRect(90, 130, 571, 251))
self.widget.setObjectName(_fromUtf8("widget"))
self.widget_2 = matplotlibWidget2(self.centralwidget)
self.widget_2.setGeometry(QtCore.QRect(770, 130, 571, 251))
self.widget_2.setObjectName(_fromUtf8("widget_2"))
self.widget_3 = matplotlibWidget3(self.centralwidget)
self.widget_3.setGeometry(QtCore.QRect(90, 430, 571, 251))
self.widget_3.setObjectName(_fromUtf8("widget_3"))
self.widget_4 = matplotlibWidget4(self.centralwidget)
self.widget_4.setGeometry(QtCore.QRect(770, 430, 571, 251))
self.widget_4.setObjectName(_fromUtf8("widget_4"))
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1445, 21))
self.menubar.setObjectName(_fromUtf8("menubar"))
self.menuFile = QtGui.QMenu(self.menubar)
self.menuFile.setObjectName(_fromUtf8("menuFile"))
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
self.statusbar.setObjectName(_fromUtf8("statusbar"))
MainWindow.setStatusBar(self.statusbar)
self.menubar.addAction(self.menuFile.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "fsa Plotter", None, QtGui.QApplication.UnicodeUTF8))
self.Button_Browse.setText(QtGui.QApplication.translate("MainWindow", "Browse", None, QtGui.QApplication.UnicodeUTF8))
self.Button_Plot.setText(QtGui.QApplication.translate("MainWindow", "Plot", None, QtGui.QApplication.UnicodeUTF8))
self.Button_Clear.setText(QtGui.QApplication.translate("MainWindow", "Clear", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("MainWindow", "Channel 1", None, QtGui.QApplication.UnicodeUTF8))
self.label_2.setText(QtGui.QApplication.translate("MainWindow", "Channel 2", None, QtGui.QApplication.UnicodeUTF8))
self.label_3.setText(QtGui.QApplication.translate("MainWindow", "Channel 3", None, QtGui.QApplication.UnicodeUTF8))
self.label_4.setText(QtGui.QApplication.translate("MainWindow", "Channel 4", None, QtGui.QApplication.UnicodeUTF8))
self.menuFile.setTitle(QtGui.QApplication.translate("MainWindow", "File", None, QtGui.QApplication.UnicodeUTF8))
from matplotlibwidget import matplotlibWidget
from matplotlibwidget3 import matplotlibWidget3
from matplotlibwidget2 import matplotlibWidget2
from matplotlibwidget4 import matplotlibWidget4

The file-dialog doesn't show, because you did not create an instance of your GUI_fsa class.
To fix that, make the following changes:
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
MainWindow = GUI_fsa()
# the next two lines aren't needed
# ui = Ui_MainWindow()
# ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
There is another problem you will also need to fix, in your Browse method. The widgets from Ui_MainWindow need to accessed via self.ui. So also make the following changes:
def Browse(self):
fname = QFileDialog.getOpenFileName()
self.ui.lineEdit.setText(fname)
...
One final suggestion: avoid using the old-style syntax for connecting signals, and use the new-style syntax instead:
# don't do this:
# QtCore.QObject.connect(self.ui.Button_Browse, QtCore.SIGNAL('clicked()'), self.Browse)
# do this!
self.ui.Button_Browse.clicked.connect(self.Browse)

try changing the lines:
def Browse(self):
fname=QFileDialog.getOpenFileName()
by
from PyQt4.QtCore import QObject, pyqtSlot
#pyqtSlot()
def on_Button_Browse_clicked(self):
fname=QFileDialog.getOpenFileName()
and remove the line
QtCore.QObject.connect(self.ui.Button_Browse, QtCore.SIGNAL('clicked()'), self.Browse)
Explanation:
When you're using QtDesigner and pyuic4 you don't need to connect the events by your self. The pyuic4 generated class take care of that for you. The only you have to do is write your class methods correctly. For example: IF you have a button called "button_1" and you want perform some action when clicked, you just create a method like this:
class Example(QMainWindow):
...
def on_button_1_clicked(self):
pass
the key here is on_button_1_clicked which stands for: on_<widget-name>_<signal> with button_1 as widget name and clicked as signal

Update value of GUI continuously built by qt designer

I am using qt4 in ubuntu system.
I have a text file which needs to be viewed in the GUI. But problem is my text file will get updated continuously and automatically. How can I update the value in GUI as the text file gets updated.
Here is my program:
#!/usr/bin/python
import os,getpass
import sys
import time
from subprocess import call
import subprocess
userName=getpass.getuser()
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(455, 317)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.textBrowser = QtGui.QTextBrowser(self.centralwidget)
self.textBrowser.setGeometry(QtCore.QRect(10, 80, 431, 141))
self.textBrowser.setSource(QtCore.QUrl(_fromUtf8("file:///home/"+userName+"/updated.txt")))
self.textBrowser.setObjectName(_fromUtf8("textBrowser"))
self.label = QtGui.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(20, 20, 621, 71))
font = QtGui.QFont()
font.setPointSize(24)
font.setBold(True)
font.setItalic(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName(_fromUtf8("label"))
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 455, 25))
self.menubar.setObjectName(_fromUtf8("menubar"))
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
self.statusbar.setObjectName(_fromUtf8("statusbar"))
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("MainWindow", "Some Program", None, QtGui.QApplication.UnicodeUTF8))
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())