Develop Reference

show arrows in QStackedWidget [duplicate]

I have two buttons (wgtbtnA & wgtbtnB) placed on two different pages (page1 and page2, respectively) inside a parent object (objectName: stackedWidget). My dilemma is this: when I run the code, the arrows don't display in PyQt. Why? How do I alternate from page1 to page2 and vice-versa?
Here is an image of runtime, which conveys what I am asking for:
Qt Designer:
I'd like to keep those small back arrows.
Below is my code:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'stackedWidget.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
import sys
import os
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(512, 304)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.stackedWidget = QtGui.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(150, 60, 161, 121))
self.stackedWidget.setObjectName(_fromUtf8("stackedWidget"))
self.page = QtGui.QWidget()
self.page.setObjectName(_fromUtf8("page"))
self.wgtMainWindow = QtGui.QPushButton(self.page)
self.wgtMainWindow.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtMainWindow.setObjectName(_fromUtf8("wgtMainWindow"))
self.stackedWidget.addWidget(self.page)
self.page_2 = QtGui.QWidget()
self.page_2.setObjectName(_fromUtf8("page_2"))
self.wgtbtnB = QtGui.QPushButton(self.page_2)
self.wgtbtnB.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtbtnB.setObjectName(_fromUtf8("wgtbtnB"))
self.stackedWidget.addWidget(self.page_2)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 512, 21))
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)
self.stackedWidget.setCurrentIndex(1)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.wgtMainWindow.setText(_translate("MainWindow", "Widget A", None))
self.wgtbtnB.setText(_translate("MainWindow", "Widget B", None))
class ControlMainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(ControlMainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())

You could use the buttons to change the page: {your QPushButton}.clicked.connect(lambda: {your QStackedWidget}.setCurrentIndex({another page}))
By Example:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'stackedWidget.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
import sys
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(512, 304)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.stackedWidget = QtGui.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(150, 60, 161, 121))
self.stackedWidget.setObjectName(_fromUtf8("stackedWidget"))
self.page = QtGui.QWidget()
self.page.setObjectName(_fromUtf8("page"))
self.wgtMainWindow = QtGui.QPushButton(self.page)
self.wgtMainWindow.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtMainWindow.setObjectName(_fromUtf8("wgtMainWindow"))
self.stackedWidget.addWidget(self.page)
self.page_2 = QtGui.QWidget()
self.page_2.setObjectName(_fromUtf8("page_2"))
self.wgtbtnB = QtGui.QPushButton(self.page_2)
self.wgtbtnB.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtbtnB.setObjectName(_fromUtf8("wgtbtnB"))
self.stackedWidget.addWidget(self.page_2)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 512, 21))
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)
self.stackedWidget.setCurrentIndex(1)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.wgtMainWindow.setText(_translate("MainWindow", "Widget A", None))
self.wgtbtnB.setText(_translate("MainWindow", "Widget B", None))
class ControlMainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(ControlMainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.wgtbtnB.clicked.connect(lambda : self.ui.stackedWidget.setCurrentIndex(0))
self.ui.wgtMainWindow.clicked.connect(lambda : self.ui.stackedWidget.setCurrentIndex(1))
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())
Start app:
after clicked button:
after clicked another button:

the two arrows you see in the designer ( in your message below) don't carry over to your application, its a function in the designer so you can switch between them easily

To implement your arrows from one screen to the next you just need to propagate those arrows making sure that they appear in each view -- now this can easily be done via code cannot say how difficult it might be in the designer. Here is a example that does something like what you might be wanting.
from sys import exit as sysExit
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class Win1Disply(QFrame):
def __init__(self, parent):
QFrame.__init__(self)
self.setFrameShape(QFrame.StyledPanel)
self.setLineWidth(0.2)
# -------
self.Cntnr = QVBoxLayout()
self.Cntnr.addWidget(QTextEdit('This is Window 1 with whatever contents you want'))
self.Win1Btn = QPushButton('>>')
self.Win1Btn.clicked.connect(parent.RightArrow)
self.Cntnr.addWidget(self.Win1Btn)
self.Cntnr.addStretch(1)
# -------
self.setLayout(self.Cntnr)
class Win2Disply(QFrame):
def __init__(self, parent):
QFrame.__init__(self)
self.setFrameShape(QFrame.StyledPanel)
self.setLineWidth(0.2)
# -------
self.Cntnr = QVBoxLayout()
self.Cntnr.addWidget(QTextEdit('This is Window 2 with whatever contents you want'))
self.Win1Btn = QPushButton('>>')
self.Win1Btn.clicked.connect(parent.RightArrow)
self.Cntnr.addWidget(self.Win1Btn)
self.Cntnr.addStretch(1)
# -------
self.setLayout(self.Cntnr)
class OptionButtons(QToolButton):
# Class OptionButtons ("Text", Connector) inherits from QToolButton
def __init__(self, Text, Connector):
QToolButton.__init__(self)
self.setText(Text)
self.setStyleSheet("font: bold;color: blue;height: 55px;width: 55px;")
self.setIconSize(QSize(32,32))
self.clicked.connect(Connector)
############################## Settings Class ##############################
class OptionSettings(QDialog):
def __init__(self, parent):
QDialog.__init__(self, parent)
line = QFrame()
line.setFrameShape(QFrame.HLine)
line.setFrameShadow(QFrame.Sunken)
self.btnWin1 = OptionButtons('Win One', self.ShowWindow1)
self.btnWin2 = OptionButtons('Win Two', self.ShowWindow2)
# Vertical Box for Buttons *************************************
self.UpLeft = QVBoxLayout()
self.UpLeft.addWidget(self.btnWin1)
self.UpLeft.addWidget(self.btnWin2)
self.UpLeft.addStretch(1)
# Display Area on Right
# Widget Flip Display ******************************************
self.UpRite = QHBoxLayout()
self.Contents = QStackedWidget()
self.Contents.addWidget(QTextEdit('Nothing Selected'))
self.Contents.addWidget(Win1Disply(self))
self.Contents.addWidget(Win2Disply(self))
self.Contents.addWidget(QTextEdit('Settings Saved'))
self.Contents.setCurrentIndex(0)
self.UpRite.addWidget(self.Contents)
# Button and Display Area on Top
self.Upper = QHBoxLayout()
self.Upper.addLayout(self.UpLeft)
self.Upper.addLayout(self.UpRite)
# Save and Cancel Area on Bottom
self.btnSave = QPushButton("Save")
self.btnSave.clicked.connect(self.SaveSettings)
self.btnCncl = QPushButton("Cancel")
self.btnCncl.clicked.connect(self.close)
self.Lower = QHBoxLayout()
self.Lower.addStretch(1)
self.Lower.addWidget(self.btnSave)
self.Lower.addWidget(self.btnCncl)
# Entire Options Window Layout
self.OuterBox = QVBoxLayout()
self.OuterBox.addLayout(self.Upper)
self.OuterBox.addLayout(self.Lower)
self.setLayout(self.OuterBox)
self.setWindowTitle('Settings')
#Geometry(Left, Top, Width, Hight)
self.setGeometry(250, 250, 550, 450)
self.setModal(True)
self.exec()
def ShowWindow1(self):
self.Contents.setCurrentIndex(1)
def ShowWindow2(self):
self.Contents.setCurrentIndex(2)
def SaveSettings(self):
self.Contents.setCurrentIndex(3)
def RightArrow(self):
if self.Contents.currentIndex() == 1:
self.Contents.setCurrentIndex(2)
else:
self.Contents.setCurrentIndex(1)
class CenterPanel(QWidget):
def __init__(self, MainWin):
QWidget.__init__(self)
CntrPane = QTextEdit('Center Panel is Placed Here')
hbox = QHBoxLayout(self)
hbox.addWidget(CntrPane)
self.setLayout(hbox)
class MenuToolBar(QDockWidget):
def __init__(self, MainWin):
QDockWidget.__init__(self)
self.MainWin = MainWin
self.MainMenu = MainWin.menuBar()
self.WndowMenu = self.MainMenu.addMenu('Windows')
self.OptnAct = QAction('Options', self)
self.OptnAct.setStatusTip('Open the Options Window')
self.OptnAct.triggered.connect(MainWin.ShowOptions)
self.WndowMenu.addAction(self.OptnAct)
self.InitToolBar(MainWin)
def InitToolBar(self, MainWin):
self.mainToolBar = MainWin.addToolBar("Quick Access")
self.mainToolBar.addAction(self.OptnAct)
class UI_MainWindow(QMainWindow):
def __init__(self):
super(UI_MainWindow, self).__init__()
self.setWindowTitle('Main Window')
# Left, Top, Width, Height
self.setGeometry(200, 200, 550, 550)
self.CenterPane = CenterPanel(self)
self.setCentralWidget(self.CenterPane)
self.MenuToolBar = MenuToolBar(self)
def ShowOptions(self):
self.Options = OptionSettings(self)
if __name__ == '__main__':
MainApp = QApplication([])
MainGui = UI_MainWindow()
MainGui.show()
sysExit(MainApp.exec_())

If you really need arrows in your stacked widget, another solution is to implement your own "Promoted Widget": it allows you to create your design with custom widgets, that might extend the basic widgets provided by Qt. You won't be able to interact with your own implementation in Designer, but you'll get the result once you run your program.
This is the procedure: create your own subclass of the widget you want to extend, define your custom methods or override existing ones (remember that some private methods require a specific return value type, check the documentation).
It's usually better to save the subclass(es) you created in a separate files.
Then, in Designer add the widget you need (in this case, StackedWidget), right click on it and select "Promote to..."; in the dialog that will be shown, type the subclass name you created in the "Promoted class name" field (in the example below, it will be "StackedWidgetWithArrowButtons") and the file that contains it in the "header file" field: it will be treated as a python import, so do not add the trailing ".py" and remember that if you saved it in a subdirectory you'll need the full "module" path, for example "mysubclasses.customstackwidget", if the file is "customstackwidget" in the "mysubclasses" directory.
Save the ui, compile it and run the program.
class StackedWidgetWithArrowButtons(QtWidgets.QStackedWidget):
def __init__(self, *args, **kwargs):
QtWidgets.QStackedWidget.__init__(self, *args, **kwargs)
self.backwardButton = QtWidgets.QToolButton(self)
self.backwardButton.setIcon(self.style().standardIcon(QtWidgets.QStyle.SP_ArrowLeft))
self.backwardButton.setMaximumSize(24, 24)
self.backwardButton.setFocusPolicy(QtCore.Qt.NoFocus)
self.forwardButton = QtWidgets.QToolButton(self)
self.forwardButton.setIcon(self.style().standardIcon(QtWidgets.QStyle.SP_ArrowRight))
self.forwardButton.setMaximumSize(24, 24)
self.forwardButton.setFocusPolicy(QtCore.Qt.NoFocus)
self.currentChanged.connect(self.checkSwitchButtons)
def checkSwitchButtons(self):
self.forwardButton.setEnabled(self.currentIndex() < self.count() - 1)
self.backwardButton.setEnabled(self.currentIndex() > 0)
def addWidget(self, widget):
# this is a private method of QStackedWidget that is called when
# the ui is being built by the program, we just implement it
# to ensure that the buttons are correctly enabled;
# the index *has* to be returned
index = QtWidgets.QStackedWidget.addWidget(self, widget)
self.checkSwitchButtons()
return index
def removeWidget(self, widget):
# not necessary, but in case you want to remove widgets in the
# future, it will check buttons again
index = QtWidgets.QStackedWidget.removeWidget(self, widget)
self.checkSwitchButtons()
return index
def mousePressEvent(self, event):
# due to the way QStackedWidget is implemented, children widgets
# that are not in its layout might not receive mouse events,
# but we just need to track clicks so this is enough
if event.button() == QtCore.Qt.LeftButton:
if event.pos() in self.backwardButton.geometry():
self.setCurrentIndex(self.currentIndex() - 1)
elif event.pos() in self.forwardButton.geometry():
self.setCurrentIndex(self.currentIndex() + 1)
def resizeEvent(self, event):
# the base class resizeEvent *has* to be called, otherwise
# you could encounter problems with children widgets
QtWidgets.QStackedWidget.resizeEvent(self, event)
# now ensure that the buttons are always placed on the top
# right corner; this positioning is completely manual and you
# have to take button sizes in consideration to avoid
# overlapping buttons; obviously you can place them wherever
# you want.
self.forwardButton.move(self.rect().right() - self.forwardButton.width(), 0)
self.backwardButton.move(self.forwardButton.x() - self.backwardButton.width(), 0)
If you don't want buttons (or you don't like the way they appear) you could implement your own paintEvent. In this case I created small triangles using QPolygons.
class StackedWidgetWithTriangles(QtWidgets.QStackedWidget):
def __init__(self, *args, **kwargs):
QtWidgets.QStackedWidget.__init__(self, *args, **kwargs)
self.backwardRect = QtCore.QRect(0, 0, 16, 16)
self.forwardRect = QtCore.QRect(0, 0, 16, 16)
self.forwardArrow = QtGui.QPolygon([QtCore.QPoint(-6, -6), QtCore.QPoint(6, 0), QtCore.QPoint(-6, 6)])
self.backwardArrow = QtGui.QPolygon([QtCore.QPoint(6, -6), QtCore.QPoint(-6, 0), QtCore.QPoint(6, 6)])
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
if event.pos() in self.backwardRect:
self.setCurrentIndex(self.currentIndex() - 1)
elif event.pos() in self.forwardRect:
self.setCurrentIndex(self.currentIndex() + 1)
def resizeEvent(self, event):
QtWidgets.QStackedWidget.resizeEvent(self, event)
self.forwardRect.moveLeft(self.rect().right() - self.forwardRect.width())
self.backwardRect.moveLeft(self.forwardRect.x() - self.forwardRect.width())
def paintEvent(self, event):
qp = QtGui.QPainter(self)
qp.setRenderHints(qp.Antialiasing)
# set colors according to the possibility of going back or forward,
# showing a "disabled" arrow whenever it's not possible
if self.currentIndex() > 0:
qp.setPen(QtCore.Qt.darkGray)
qp.setBrush(QtCore.Qt.black)
else:
qp.setPen(QtCore.Qt.lightGray)
qp.setBrush(QtCore.Qt.transparent)
qp.drawPolygon(self.backwardArrow.translated(self.backwardRect.center()))
if self.currentIndex() < self.count() - 1:
qp.setPen(QtCore.Qt.darkGray)
qp.setBrush(QtCore.Qt.black)
else:
qp.setPen(QtCore.Qt.lightGray)
qp.setBrush(QtCore.Qt.transparent)
qp.drawPolygon(self.forwardArrow.translated(self.forwardRect.center()))

you have no logic in your ControlMainWindow class to switch between your widgets. (also i don't see any arrow widgets for switching) you'll need to add a listener to your QTbuttons in your main class like below to execute your logic:
yourQTbutton.itemClicked.connect(self.functioWithUIchangingLogic)

How to add a list in a particular cell pyqt4

I have a scenario where I have a table and I want to display a list widget under a particular cell which I click.i am getting the click on cell in the first column and want to use on click on only first cell.(cell click is implemented here) . the only problem is how to display list under cell now.?!?!?!
Initial View
Final
My Code for Table is :-
from untitled import *
from PyQt4 import QtGui # Import the PyQt4 module we'll need
import sys # We need sys so that we can pass argv to QApplication
import os
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4 import QtGui, QtCore
class MainWindow(QMainWindow,Ui_MainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.setupUi(self)
self.tableWidget.clicked.connect(self.hello)
def hello(self,item):
#print(item.column())
if item.column()==0 :
print("success")
#I want to add this List at this cell of table
itemN = QtGui.QListWidget()
#hlayout = QtGui.QHBoxLayout()
#hlayout.addWidget(itemN)
#self.setCentralWidget(itemN)
if __name__ == '__main__':
app = QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
Any help would be appreciated.
Thanks
my untitled.py code is here which generates a table in a window
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# 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(800, 600)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.gridLayout = QtGui.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
self.tableWidget = QtGui.QTableWidget(self.centralwidget)
self.tableWidget.setObjectName(_fromUtf8("tableWidget"))
self.tableWidget.setColumnCount(4)
self.tableWidget.setRowCount(13)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(2, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(3, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(4, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(5, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(6, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(7, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(8, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(9, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(10, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(11, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(12, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(2, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(3, item)
self.gridLayout.addWidget(self.tableWidget, 0, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 31))
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(_translate("MainWindow", "MainWindow", None))
item = self.tableWidget.verticalHeaderItem(0)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(1)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(2)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(3)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(4)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(5)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(6)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(7)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(8)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(9)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(10)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(11)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.verticalHeaderItem(12)
item.setText(_translate("MainWindow", "New Row", None))
item = self.tableWidget.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "a", None))
item = self.tableWidget.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "b", None))
item = self.tableWidget.horizontalHeaderItem(2)
item.setText(_translate("MainWindow", "New Column", None))
item = self.tableWidget.horizontalHeaderItem(3)
item.setText(_translate("MainWindow", "d", 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_())

To get the position of the current cell we use the columnViewportPosition() and rowViewportPosition() methods that return the position x, y of the row and column respectively with respect to the QTableWidget viewport(), then we get the global position using the mapToGlobal() method, we will add the height of the cell to move it vertically.
It creates a Popup for it is going to use a QDialog where the QListWidget will be placed, this widget returns the selected text.
class PopUp(QDialog):
def __init__(self, labels):
QDialog.__init__(self, None, Qt.Popup | Qt.FramelessWindowHint)
self.itemSelected = ""
self.setLayout(QVBoxLayout())
lWidget = QListWidget(self)
self.layout().addWidget(lWidget)
lWidget.addItems(labels)
lWidget.itemClicked.connect(self.onItemClicked)
self.layout().setContentsMargins(0, 0, 0, 0)
def onItemClicked(self, item):
self.itemSelected = item.text()
self.accept()
def text(self):
return self.itemSelected
class MainWindow(QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.setupUi(self)
self.tableWidget.clicked.connect(self.onClicked)
def onClicked(self, index):
row = index.row()
column = index.column()
x = self.tableWidget.columnViewportPosition(column)
y = self.tableWidget.rowViewportPosition(row) + self.tableWidget.rowHeight(row)
pos = self.tableWidget.viewport().mapToGlobal(QPoint(x, y))
p = PopUp(["1", "2", "3", "4", "5"])
p.move(pos)
if p.exec_() == QDialog.Accepted:
t_item = QTableWidgetItem(p.text())
self.tableWidget.setItem(row, column, t_item)
Screenshot:

I think the function you are looking for is:
self.tableWidget.setCellWidget(rowNum, colNum, itemN)
Where rowNum and colNum is the position, so 0,0 will put it in the upper left box. itemN is the QListWidget you made.
Here is a reference:
http://pyqt.sourceforge.net/Docs/PyQt4/qtablewidget.html#setCellWidget
And here is a related question: Adding widgets to qtablewidget pyqt
After looking at your screenshots I see the object you want is a QComboBox, not a QlistWidget.
Link: http://doc.qt.io/qt-4.8/qcombobox.html
You'll want to use the original function I mentioned to fill an element of the table with a combobox instead of a listWidget. And then use addItems to fill the combobox with options. And then use currentText to see what option the user has selected.
If that doesn't sound like what you want, you'll have to make a custom version of the tableWidget that has the functionality you want. That is more complicated and I can't cover that all in a single answer. But if you have more questions I can try to point you in the right direction.

PyQt: How to switch widgets in QStackedWidget

I have two buttons (wgtbtnA & wgtbtnB) placed on two different pages (page1 and page2, respectively) inside a parent object (objectName: stackedWidget). My dilemma is this: when I run the code, the arrows don't display in PyQt. Why? How do I alternate from page1 to page2 and vice-versa?
Here is an image of runtime, which conveys what I am asking for:
Qt Designer:
I'd like to keep those small back arrows.
Below is my code:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'stackedWidget.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
import sys
import os
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(512, 304)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.stackedWidget = QtGui.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(150, 60, 161, 121))
self.stackedWidget.setObjectName(_fromUtf8("stackedWidget"))
self.page = QtGui.QWidget()
self.page.setObjectName(_fromUtf8("page"))
self.wgtMainWindow = QtGui.QPushButton(self.page)
self.wgtMainWindow.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtMainWindow.setObjectName(_fromUtf8("wgtMainWindow"))
self.stackedWidget.addWidget(self.page)
self.page_2 = QtGui.QWidget()
self.page_2.setObjectName(_fromUtf8("page_2"))
self.wgtbtnB = QtGui.QPushButton(self.page_2)
self.wgtbtnB.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtbtnB.setObjectName(_fromUtf8("wgtbtnB"))
self.stackedWidget.addWidget(self.page_2)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 512, 21))
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)
self.stackedWidget.setCurrentIndex(1)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.wgtMainWindow.setText(_translate("MainWindow", "Widget A", None))
self.wgtbtnB.setText(_translate("MainWindow", "Widget B", None))
class ControlMainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(ControlMainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())

You could use the buttons to change the page: {your QPushButton}.clicked.connect(lambda: {your QStackedWidget}.setCurrentIndex({another page}))
By Example:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'stackedWidget.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
import sys
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(512, 304)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.stackedWidget = QtGui.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(150, 60, 161, 121))
self.stackedWidget.setObjectName(_fromUtf8("stackedWidget"))
self.page = QtGui.QWidget()
self.page.setObjectName(_fromUtf8("page"))
self.wgtMainWindow = QtGui.QPushButton(self.page)
self.wgtMainWindow.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtMainWindow.setObjectName(_fromUtf8("wgtMainWindow"))
self.stackedWidget.addWidget(self.page)
self.page_2 = QtGui.QWidget()
self.page_2.setObjectName(_fromUtf8("page_2"))
self.wgtbtnB = QtGui.QPushButton(self.page_2)
self.wgtbtnB.setGeometry(QtCore.QRect(50, 50, 75, 23))
self.wgtbtnB.setObjectName(_fromUtf8("wgtbtnB"))
self.stackedWidget.addWidget(self.page_2)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 512, 21))
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)
self.stackedWidget.setCurrentIndex(1)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.wgtMainWindow.setText(_translate("MainWindow", "Widget A", None))
self.wgtbtnB.setText(_translate("MainWindow", "Widget B", None))
class ControlMainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(ControlMainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.wgtbtnB.clicked.connect(lambda : self.ui.stackedWidget.setCurrentIndex(0))
self.ui.wgtMainWindow.clicked.connect(lambda : self.ui.stackedWidget.setCurrentIndex(1))
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())
Start app:
after clicked button:
after clicked another button:

the two arrows you see in the designer ( in your message below) don't carry over to your application, its a function in the designer so you can switch between them easily

To implement your arrows from one screen to the next you just need to propagate those arrows making sure that they appear in each view -- now this can easily be done via code cannot say how difficult it might be in the designer. Here is a example that does something like what you might be wanting.
from sys import exit as sysExit
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class Win1Disply(QFrame):
def __init__(self, parent):
QFrame.__init__(self)
self.setFrameShape(QFrame.StyledPanel)
self.setLineWidth(0.2)
# -------
self.Cntnr = QVBoxLayout()
self.Cntnr.addWidget(QTextEdit('This is Window 1 with whatever contents you want'))
self.Win1Btn = QPushButton('>>')
self.Win1Btn.clicked.connect(parent.RightArrow)
self.Cntnr.addWidget(self.Win1Btn)
self.Cntnr.addStretch(1)
# -------
self.setLayout(self.Cntnr)
class Win2Disply(QFrame):
def __init__(self, parent):
QFrame.__init__(self)
self.setFrameShape(QFrame.StyledPanel)
self.setLineWidth(0.2)
# -------
self.Cntnr = QVBoxLayout()
self.Cntnr.addWidget(QTextEdit('This is Window 2 with whatever contents you want'))
self.Win1Btn = QPushButton('>>')
self.Win1Btn.clicked.connect(parent.RightArrow)
self.Cntnr.addWidget(self.Win1Btn)
self.Cntnr.addStretch(1)
# -------
self.setLayout(self.Cntnr)
class OptionButtons(QToolButton):
# Class OptionButtons ("Text", Connector) inherits from QToolButton
def __init__(self, Text, Connector):
QToolButton.__init__(self)
self.setText(Text)
self.setStyleSheet("font: bold;color: blue;height: 55px;width: 55px;")
self.setIconSize(QSize(32,32))
self.clicked.connect(Connector)
############################## Settings Class ##############################
class OptionSettings(QDialog):
def __init__(self, parent):
QDialog.__init__(self, parent)
line = QFrame()
line.setFrameShape(QFrame.HLine)
line.setFrameShadow(QFrame.Sunken)
self.btnWin1 = OptionButtons('Win One', self.ShowWindow1)
self.btnWin2 = OptionButtons('Win Two', self.ShowWindow2)
# Vertical Box for Buttons *************************************
self.UpLeft = QVBoxLayout()
self.UpLeft.addWidget(self.btnWin1)
self.UpLeft.addWidget(self.btnWin2)
self.UpLeft.addStretch(1)
# Display Area on Right
# Widget Flip Display ******************************************
self.UpRite = QHBoxLayout()
self.Contents = QStackedWidget()
self.Contents.addWidget(QTextEdit('Nothing Selected'))
self.Contents.addWidget(Win1Disply(self))
self.Contents.addWidget(Win2Disply(self))
self.Contents.addWidget(QTextEdit('Settings Saved'))
self.Contents.setCurrentIndex(0)
self.UpRite.addWidget(self.Contents)
# Button and Display Area on Top
self.Upper = QHBoxLayout()
self.Upper.addLayout(self.UpLeft)
self.Upper.addLayout(self.UpRite)
# Save and Cancel Area on Bottom
self.btnSave = QPushButton("Save")
self.btnSave.clicked.connect(self.SaveSettings)
self.btnCncl = QPushButton("Cancel")
self.btnCncl.clicked.connect(self.close)
self.Lower = QHBoxLayout()
self.Lower.addStretch(1)
self.Lower.addWidget(self.btnSave)
self.Lower.addWidget(self.btnCncl)
# Entire Options Window Layout
self.OuterBox = QVBoxLayout()
self.OuterBox.addLayout(self.Upper)
self.OuterBox.addLayout(self.Lower)
self.setLayout(self.OuterBox)
self.setWindowTitle('Settings')
#Geometry(Left, Top, Width, Hight)
self.setGeometry(250, 250, 550, 450)
self.setModal(True)
self.exec()
def ShowWindow1(self):
self.Contents.setCurrentIndex(1)
def ShowWindow2(self):
self.Contents.setCurrentIndex(2)
def SaveSettings(self):
self.Contents.setCurrentIndex(3)
def RightArrow(self):
if self.Contents.currentIndex() == 1:
self.Contents.setCurrentIndex(2)
else:
self.Contents.setCurrentIndex(1)
class CenterPanel(QWidget):
def __init__(self, MainWin):
QWidget.__init__(self)
CntrPane = QTextEdit('Center Panel is Placed Here')
hbox = QHBoxLayout(self)
hbox.addWidget(CntrPane)
self.setLayout(hbox)
class MenuToolBar(QDockWidget):
def __init__(self, MainWin):
QDockWidget.__init__(self)
self.MainWin = MainWin
self.MainMenu = MainWin.menuBar()
self.WndowMenu = self.MainMenu.addMenu('Windows')
self.OptnAct = QAction('Options', self)
self.OptnAct.setStatusTip('Open the Options Window')
self.OptnAct.triggered.connect(MainWin.ShowOptions)
self.WndowMenu.addAction(self.OptnAct)
self.InitToolBar(MainWin)
def InitToolBar(self, MainWin):
self.mainToolBar = MainWin.addToolBar("Quick Access")
self.mainToolBar.addAction(self.OptnAct)
class UI_MainWindow(QMainWindow):
def __init__(self):
super(UI_MainWindow, self).__init__()
self.setWindowTitle('Main Window')
# Left, Top, Width, Height
self.setGeometry(200, 200, 550, 550)
self.CenterPane = CenterPanel(self)
self.setCentralWidget(self.CenterPane)
self.MenuToolBar = MenuToolBar(self)
def ShowOptions(self):
self.Options = OptionSettings(self)
if __name__ == '__main__':
MainApp = QApplication([])
MainGui = UI_MainWindow()
MainGui.show()
sysExit(MainApp.exec_())

If you really need arrows in your stacked widget, another solution is to implement your own "Promoted Widget": it allows you to create your design with custom widgets, that might extend the basic widgets provided by Qt. You won't be able to interact with your own implementation in Designer, but you'll get the result once you run your program.
This is the procedure: create your own subclass of the widget you want to extend, define your custom methods or override existing ones (remember that some private methods require a specific return value type, check the documentation).
It's usually better to save the subclass(es) you created in a separate files.
Then, in Designer add the widget you need (in this case, StackedWidget), right click on it and select "Promote to..."; in the dialog that will be shown, type the subclass name you created in the "Promoted class name" field (in the example below, it will be "StackedWidgetWithArrowButtons") and the file that contains it in the "header file" field: it will be treated as a python import, so do not add the trailing ".py" and remember that if you saved it in a subdirectory you'll need the full "module" path, for example "mysubclasses.customstackwidget", if the file is "customstackwidget" in the "mysubclasses" directory.
Save the ui, compile it and run the program.
class StackedWidgetWithArrowButtons(QtWidgets.QStackedWidget):
def __init__(self, *args, **kwargs):
QtWidgets.QStackedWidget.__init__(self, *args, **kwargs)
self.backwardButton = QtWidgets.QToolButton(self)
self.backwardButton.setIcon(self.style().standardIcon(QtWidgets.QStyle.SP_ArrowLeft))
self.backwardButton.setMaximumSize(24, 24)
self.backwardButton.setFocusPolicy(QtCore.Qt.NoFocus)
self.forwardButton = QtWidgets.QToolButton(self)
self.forwardButton.setIcon(self.style().standardIcon(QtWidgets.QStyle.SP_ArrowRight))
self.forwardButton.setMaximumSize(24, 24)
self.forwardButton.setFocusPolicy(QtCore.Qt.NoFocus)
self.currentChanged.connect(self.checkSwitchButtons)
def checkSwitchButtons(self):
self.forwardButton.setEnabled(self.currentIndex() < self.count() - 1)
self.backwardButton.setEnabled(self.currentIndex() > 0)
def addWidget(self, widget):
# this is a private method of QStackedWidget that is called when
# the ui is being built by the program, we just implement it
# to ensure that the buttons are correctly enabled;
# the index *has* to be returned
index = QtWidgets.QStackedWidget.addWidget(self, widget)
self.checkSwitchButtons()
return index
def removeWidget(self, widget):
# not necessary, but in case you want to remove widgets in the
# future, it will check buttons again
index = QtWidgets.QStackedWidget.removeWidget(self, widget)
self.checkSwitchButtons()
return index
def mousePressEvent(self, event):
# due to the way QStackedWidget is implemented, children widgets
# that are not in its layout might not receive mouse events,
# but we just need to track clicks so this is enough
if event.button() == QtCore.Qt.LeftButton:
if event.pos() in self.backwardButton.geometry():
self.setCurrentIndex(self.currentIndex() - 1)
elif event.pos() in self.forwardButton.geometry():
self.setCurrentIndex(self.currentIndex() + 1)
def resizeEvent(self, event):
# the base class resizeEvent *has* to be called, otherwise
# you could encounter problems with children widgets
QtWidgets.QStackedWidget.resizeEvent(self, event)
# now ensure that the buttons are always placed on the top
# right corner; this positioning is completely manual and you
# have to take button sizes in consideration to avoid
# overlapping buttons; obviously you can place them wherever
# you want.
self.forwardButton.move(self.rect().right() - self.forwardButton.width(), 0)
self.backwardButton.move(self.forwardButton.x() - self.backwardButton.width(), 0)
If you don't want buttons (or you don't like the way they appear) you could implement your own paintEvent. In this case I created small triangles using QPolygons.
class StackedWidgetWithTriangles(QtWidgets.QStackedWidget):
def __init__(self, *args, **kwargs):
QtWidgets.QStackedWidget.__init__(self, *args, **kwargs)
self.backwardRect = QtCore.QRect(0, 0, 16, 16)
self.forwardRect = QtCore.QRect(0, 0, 16, 16)
self.forwardArrow = QtGui.QPolygon([QtCore.QPoint(-6, -6), QtCore.QPoint(6, 0), QtCore.QPoint(-6, 6)])
self.backwardArrow = QtGui.QPolygon([QtCore.QPoint(6, -6), QtCore.QPoint(-6, 0), QtCore.QPoint(6, 6)])
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
if event.pos() in self.backwardRect:
self.setCurrentIndex(self.currentIndex() - 1)
elif event.pos() in self.forwardRect:
self.setCurrentIndex(self.currentIndex() + 1)
def resizeEvent(self, event):
QtWidgets.QStackedWidget.resizeEvent(self, event)
self.forwardRect.moveLeft(self.rect().right() - self.forwardRect.width())
self.backwardRect.moveLeft(self.forwardRect.x() - self.forwardRect.width())
def paintEvent(self, event):
qp = QtGui.QPainter(self)
qp.setRenderHints(qp.Antialiasing)
# set colors according to the possibility of going back or forward,
# showing a "disabled" arrow whenever it's not possible
if self.currentIndex() > 0:
qp.setPen(QtCore.Qt.darkGray)
qp.setBrush(QtCore.Qt.black)
else:
qp.setPen(QtCore.Qt.lightGray)
qp.setBrush(QtCore.Qt.transparent)
qp.drawPolygon(self.backwardArrow.translated(self.backwardRect.center()))
if self.currentIndex() < self.count() - 1:
qp.setPen(QtCore.Qt.darkGray)
qp.setBrush(QtCore.Qt.black)
else:
qp.setPen(QtCore.Qt.lightGray)
qp.setBrush(QtCore.Qt.transparent)
qp.drawPolygon(self.forwardArrow.translated(self.forwardRect.center()))

you have no logic in your ControlMainWindow class to switch between your widgets. (also i don't see any arrow widgets for switching) you'll need to add a listener to your QTbuttons in your main class like below to execute your logic:
yourQTbutton.itemClicked.connect(self.functioWithUIchangingLogic)

How to switch between two windows in python using PyQt

I am working on some app. I wanted to create a toolbar that after having been clicked will open Settings window. However I don't know how to do it exactly. The way it is now is that i have a Toolbar icon connected to ShowSettings function. This function creates a new instance of settings each time I click on the icon ( i know it shouldn't create new instances each time but only one in the beginning and then work on it. I don't know how to do it though) and then show the settings window associated with this instance. However in this way the settings window only flashes for a second and then disappears. I don't know what's wrong hope you can help me out :)
import sys
import time
from PyQt4 import QtCore, QtGui
from ui import Ui_MainWindow
from ui import Ui_SettingsWindow
#Aplikacja obslugujaca bramki LF
#zamiana pliku .ui na kod pythona
#pyuic4 untitled.ui -o output.py
class timerThread(QtCore.QThread):
timeElapsed = QtCore.pyqtSignal(float)
def __init__(self, parent=None):
super(timerThread, self).__init__(parent)
self.timeStart = None
def start(self, timeStart):
self.timeStart = timeStart
return super(timerThread, self).start()
def run(self):
while self.parent().isRunning():
self.timeElapsed.emit(time.time() - self.timeStart)
time.sleep(0.1)
class myThread(QtCore.QThread):
timeElapsed = QtCore.pyqtSignal(float)
def __init__(self, parent=None):
super(myThread, self).__init__(parent)
self.timerThread = timerThread(self)
self.timerThread.timeElapsed.connect(self.timeElapsed.emit)
def run(self):
self.timerThread.start(time.time())
iterations = 10000000000
while iterations:
print "Running {0}".format(self.__class__.__name__)
iterations -= 1
time.sleep(10)
class SettingsWindow(QtGui.QMainWindow):
#Constructor:
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui_settigns = Ui_SettingsWindow()
self.ui_settigns.setupUi(self)
class MainWindow(QtGui.QMainWindow):
#Constructor:
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.myThread = myThread(self)
self.myThread.timeElapsed.connect(self.on_myThread_timeElapsed)
self.myThread.finished.connect(self.on_myThread_finished)
#Nie wiem jak przerzucic to do pliku UI bez errorow
#Toolbar
settingsAction = QtGui.QAction(QtGui.QIcon('tools.jpg'), 'Ustawienia', self)
settingsAction.setShortcut('Ctrl+U')
settingsAction.triggered.connect(self.ShowSettings)
self.toolbar = self.addToolBar('Settings')
self.toolbar.addAction(settingsAction)
def UpdateList(self):
contest_name = self.ui.comboBox.currentText()
#jakis try-catch tutaj sie przyda gdyby nie plik nie istnial
#zczytuje z pliku liste robotow
with open('database\%s.txt' % contest_name) as f:
robots_list = f.read().splitlines()
self.ui.listWidget.clear()
self.ui.listWidget.addItems(robots_list)
def Search(self):
text = self.ui.lineEdit.text()
self.ui.lineEdit.clear()
item = self.ui.listWidget.findItems(text, QtCore.Qt.MatchExactly)
#jakiegos try-catcha trzeba tutaj walnac
self.ui.listWidget.setItemSelected(item[0], True)
def ShowSettings(self):
settings = SettingsWindow() #creates settings instance
settings.show()
#QtCore.pyqtSlot()
def on_button_clicked(self):
self.myThread.start()
#QtCore.pyqtSlot(int)
def on_myThread_timeElapsed(self, seconds):
self.ui.lcdNumber.display(seconds)
#QtCore.pyqtSlot()
def on_myThread_finished(self):
self.myThread.terminate()
print "Done"
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = MainWindow()
settings = SettingsWindow()
myapp.show()
settings.show()
sys.exit(app.exec_())
And Here is the UI file
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'untitled.ui'
#
# Created: Fri Apr 24 08:04:20 2015
# by: PyQt4 UI code generator 4.11.3
#
# 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_SettingsWindow(object):
def setupUi(self, SettingsWindow):
SettingsWindow.setObjectName(_fromUtf8("Ustawienia"))
SettingsWindow.resize(686, 556)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(686, 556)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.groupBox = QtGui.QGroupBox(self.centralwidget)
self.groupBox.setGeometry(QtCore.QRect(10, 10, 341, 491))
self.groupBox.setObjectName(_fromUtf8("groupBox"))
self.pushButton = QtGui.QPushButton(self.groupBox)
self.pushButton.setGeometry(QtCore.QRect(10, 460, 231, 23))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.label = QtGui.QLabel(self.groupBox)
self.label.setGeometry(QtCore.QRect(10, 80, 90, 16))
self.label.setObjectName(_fromUtf8("label"))
self.lineEdit = QtGui.QLineEdit(self.groupBox)
self.lineEdit.setGeometry(QtCore.QRect(130, 77, 191, 20))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.listWidget = QtGui.QListWidget(self.groupBox)
self.listWidget.setGeometry(QtCore.QRect(10, 110, 321, 341))
self.listWidget.setObjectName(_fromUtf8("listWidget"))
item = QtGui.QListWidgetItem()
self.listWidget.addItem(item)
item = QtGui.QListWidgetItem()
self.listWidget.addItem(item)
item = QtGui.QListWidgetItem()
self.listWidget.addItem(item)
self.label_2 = QtGui.QLabel(self.groupBox)
self.label_2.setGeometry(QtCore.QRect(10, 50, 111, 16))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.comboBox = QtGui.QComboBox(self.groupBox)
self.comboBox.setGeometry(QtCore.QRect(130, 50, 191, 22))
self.comboBox.setObjectName(_fromUtf8("comboBox"))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.groupBox_2 = QtGui.QGroupBox(self.centralwidget)
self.groupBox_2.setGeometry(QtCore.QRect(360, 10, 311, 491))
self.groupBox_2.setObjectName(_fromUtf8("groupBox_2"))
self.lcdNumber = QtGui.QLCDNumber(self.groupBox_2)
self.lcdNumber.setGeometry(QtCore.QRect(10, 20, 281, 151))
self.lcdNumber.setSmallDecimalPoint(True)
self.lcdNumber.setObjectName(_fromUtf8("lcdNumber"))
self.pushButton_2 = QtGui.QPushButton(self.groupBox_2)
self.pushButton_2.setGeometry(QtCore.QRect(20, 340, 75, 23))
self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
self.pushButton_3 = QtGui.QPushButton(self.groupBox_2)
self.pushButton_3.setGeometry(QtCore.QRect(200, 340, 75, 23))
self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.lineEdit.clear)
QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL("returnPressed()"), MainWindow.Search) #connected to Search method in class MainWindow
QtCore.QObject.connect(self.comboBox, QtCore.SIGNAL(_fromUtf8("currentIndexChanged(QString)")), MainWindow.UpdateList)
QtCore.QObject.connect(self.pushButton_2, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.on_button_clicked)
QtCore.QObject.connect(self.pushButton_3, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.on_myThread_finished)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "LF Timer", None))
self.groupBox.setTitle(_translate("MainWindow", "Wybierz robota", None))
self.pushButton.setText(_translate("MainWindow", "Uruchom Aplikację Pomiaru Czasu", None))
self.label.setText(_translate("MainWindow", "Wyszukaj robota:", None))
self.lineEdit.setText(_translate("MainWindow", "cos tam", None))
__sortingEnabled = self.listWidget.isSortingEnabled()
self.listWidget.setSortingEnabled(False)
item = self.listWidget.item(0)
item.setText(_translate("MainWindow", "Robot 1", None))
item = self.listWidget.item(1)
item.setText(_translate("MainWindow", "Robot 2", None))
item = self.listWidget.item(2)
item.setText(_translate("MainWindow", "Robot 3", None))
self.listWidget.setSortingEnabled(__sortingEnabled)
self.label_2.setText(_translate("MainWindow", "Wybierz Konkurencje:", None))
self.comboBox.setItemText(0, _translate("MainWindow", "", None))
self.comboBox.setItemText(1, _translate("MainWindow", "LF", None))
self.comboBox.setItemText(2, _translate("MainWindow", "TURBO LF", None))
self.comboBox.setItemText(3, _translate("MainWindow", "LEGO LF", None))
self.groupBox_2.setTitle(_translate("MainWindow", "Pomiar Czasu", None))
self.pushButton_2.setText(_translate("MainWindow", "Start", None))
self.pushButton_3.setText(_translate("MainWindow", "Stop", None))

The instance of the settings window is local to the MainWindow.ShowSettings method. As such, it is quickly garbage collected because nothing keeps a reference to the window.
You can fix this in two ways. The first is to specify a parent of the settings window when it is instantiated. The second is to store it as an instance attribute of MainWindow (eg self.settings = ...).

Thank you three_pineapples for your help. I used the second way that you have described. It works like a dream :) Here's the code if anyone needs it.
import sys
import time
from PyQt4 import QtCore, QtGui
from ui import Ui_MainWindow
from ui import Ui_SettingsWindow
#Aplikacja obslugujaca bramki LF
#zamiana pliku .ui na kod pythona
#pyuic4 untitled.ui -o output.py
#py to exe
#python setup.py py2exe --includes sip
class timerThread(QtCore.QThread):
timeElapsed = QtCore.pyqtSignal(float)
def __init__(self, parent=None):
super(timerThread, self).__init__(parent)
self.timeStart = None
def start(self, timeStart):
self.timeStart = timeStart
return super(timerThread, self).start()
def run(self):
while self.parent().isRunning():
self.timeElapsed.emit(time.time() - self.timeStart)
time.sleep(0.1)
class myThread(QtCore.QThread):
timeElapsed = QtCore.pyqtSignal(float)
def __init__(self, parent=None):
super(myThread, self).__init__(parent)
self.timerThread = timerThread(self)
self.timerThread.timeElapsed.connect(self.timeElapsed.emit)
def run(self):
self.timerThread.start(time.time())
iterations = 10000000000
while iterations:
print "Running {0}".format(self.__class__.__name__)
iterations -= 1
time.sleep(10)
class SettingsWindow(QtGui.QMainWindow):
#Constructor:
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui_settigns = Ui_SettingsWindow()
self.ui_settigns.setupUi(self)
class MainWindow(QtGui.QMainWindow):
#Constructor:
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.settings = SettingsWindow()# Creates and stores SettingsWindow instance, MainWindow manages SettingsWindow
self.myThread = myThread(self)
self.myThread.timeElapsed.connect(self.on_myThread_timeElapsed)
self.myThread.finished.connect(self.on_myThread_finished)
#Nie wiem jak przerzucic to do pliku UI bez errorow
#Toolbar
settingsAction = QtGui.QAction(QtGui.QIcon('tools.jpg'), 'Ustawienia', self)
settingsAction.setShortcut('Ctrl+U')
settingsAction.triggered.connect(self.ShowSettings)
self.toolbar = self.addToolBar('Settings')
self.toolbar.addAction(settingsAction)
def UpdateList(self):
contest_name = self.ui.comboBox.currentText()
#jakis try-catch tutaj sie przyda gdyby nie plik nie istnial
#zczytuje z pliku liste robotow
with open('database\%s.txt' % contest_name) as f:
robots_list = f.read().splitlines()
self.ui.listWidget.clear()
self.ui.listWidget.addItems(robots_list)
def Search(self):
text = self.ui.lineEdit.text()
self.ui.lineEdit.clear()
item = self.ui.listWidget.findItems(text, QtCore.Qt.MatchExactly)
#jakiegos try-catcha trzeba tutaj walnac
self.ui.listWidget.setItemSelected(item[0], True)
def ShowSettings(self):
self.settings.show()
#QtCore.pyqtSlot()
def on_button_clicked(self):
self.myThread.start()
#QtCore.pyqtSlot(int)
def on_myThread_timeElapsed(self, seconds):
self.ui.lcdNumber.display(seconds)
#QtCore.pyqtSlot()
def on_myThread_finished(self):
self.myThread.terminate()
print "Done"
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = MainWindow()
myapp.show()
sys.exit(app.exec_())

Save the selections made in the qcombobox in pyqt

I'm new to Pyqt programming. i tried to build a simple GUI which looks like the one in the picture:
This is the code which i wrote:
from PyQt4 import QtCore, QtGui
import subprocess
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_Dialog(object):
Ui_Dialog.hypermesh =0
def setupUi(self, Dialog):
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(435, 181)
self.gridLayout_2 = QtGui.QGridLayout(Dialog)
self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
self.groupBox = QtGui.QGroupBox(Dialog)
self.groupBox.setObjectName(_fromUtf8("groupBox"))
self.gridLayout = QtGui.QGridLayout(self.groupBox)
self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
self.pushButton = QtGui.QPushButton(self.groupBox)
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.gridLayout.addWidget(self.pushButton, 0, 0, 1, 1)
self.comboBox = QtGui.QComboBox(self.groupBox)
self.comboBox.setObjectName(_fromUtf8("comboBox"))
self.gridLayout.addWidget(self.comboBox, 0, 1, 1, 1)
self.pushButton_3 = QtGui.QPushButton(self.groupBox)
self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
self.gridLayout.addWidget(self.pushButton_3, 1, 0, 1, 1)
self.pushButton_2 = QtGui.QPushButton(self.groupBox)
self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
self.gridLayout.addWidget(self.pushButton_2, 1, 1, 1, 1)
self.gridLayout_2.addWidget(self.groupBox, 0, 0, 1, 1)
hypmv=[]
cont=subprocess.Popen('ls /usr/local/bin/hm*',stdout=subprocess.PIPE,stdin=subprocess.PIPE,shell=True)
contents = cont.stdout.readlines()
for i in range(len(contents)):
temp=contents[i].strip()
temp=temp.split('/')
size=len(temp)
hypmv.append(temp[size-1])
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.setItemText(i, _translate("Dialog", hypmv[i], None))
self.retranslateUi(Dialog)
QtCore.QObject.connect(self.pushButton_3, QtCore.SIGNAL(_fromUtf8("clicked()")), Dialog.reject)
QtCore.QMetaObject.connectSlotsByName(Dialog)
QtCore.QObject.connect(self.pushButton,QtCore.SIGNAL(_fromUtf8("clicked()")),self.hypm)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))
self.groupBox.setTitle(_translate("Dialog", "Software Selector", None))
self.pushButton.setText(_translate("Dialog", "Hypermesh(Pre processor)", None))
self.pushButton_3.setText(_translate("Dialog", "Quit", None))
self.pushButton_2.setText(_translate("Dialog", "Save", None))
def hypm(self):
Ui_Dialog.hypermesh = unicode(self.comboBox.currentText())
subprocess.Popen(Ui_Dialog.hypermesh,shell=True)
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_())
In the code the combobox items are intialized when the gui intializes and when i hit the button should open the software version which was selected in the combobox currently. this function it's doing pretty good.
But now i want to save the selection made by the user so that every time he invokes the gui he shouldn't select again the version previously he used in the combobox.
so if he selects hm_11.0 for the first time it should be everytime "hm_11.0" until he changes it. How can i do this??

This is the class you want to be reading: http://pyqt.sourceforge.net/Docs/PyQt4/qsettings.html
There is like a small tutorial inside (ctrl+f Restoring the State of a GUI Application).
You will use setValue to store information with par keyToSetting/valueOfSetting and reading with value keyToSetting.
Example:
import sys
from PyQt4 import QtGui, QtCore
class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
self.readSettings()
self.setWindowTitle('Simple')
self.show()
def readSettings(self):
settings = QtCore.QSettings("AyaanTech", "SoftwareTest")
self.setGeometry(settings.value("geometry", QtCore.QRect(300, 300, 250, 150)).toRect());
def writeSettings(self):
settings = QtCore.QSettings("AyaanTech", "SoftwareTest")
settings.setValue("geometry", self.geometry());
def closeEvent(self, event):
quit_msg = "Do you want to save position and size?"
reply = QtGui.QMessageBox.question(self, 'Message',
quit_msg, QtGui.QMessageBox.Yes, QtGui.QMessageBox.No, QtGui.QMessageBox.Cancel)
if reply == QtGui.QMessageBox.Yes:
self.writeSettings()
event.accept()
elif reply == QtGui.QMessageBox.No:
event.accept()
else:
event.ignore()
def main():
app = QtGui.QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
if __name__ == '__main__':
main()