I'm learning PyQt5 on python3 and I'm having some troubles with associating keyPressEvent to a QLineEdit.
I'd like to associate keyPressEvent to QLineEdit so that when I press a key having the LineEdit box selected an action is triggered.
Here an example of what I'd like to achieve:
I write something in the LineEdit Box
I press a key (say 'Enter' for example)
What I have wrote in the LineEdit Box is printed on the terminal
If I deselect the Box or select another object in my GUI (i.e. another LineEdit Box) and I press enter I don't trigger the previous action.
Here an example of the code where I'd like to implement this functionality:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(400, 300)
self.lineEdit = QtWidgets.QLineEdit(Dialog)
self.lineEdit.setGeometry(QtCore.QRect(90, 40, 113, 21))
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtWidgets.QLineEdit(Dialog)
self.lineEdit_2.setGeometry(QtCore.QRect(90, 80, 113, 21))
self.lineEdit_2.setObjectName("lineEdit_2")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
I hope someone can help me with this!
Related
I am newbie and maybe this is silly question.
I want to activate tab by clicking on pushButton . If I click pushButton_1 then it shows/activates tab_1, on the clicking pushButton_2 switches to tab_2, and so on . Bellow there is pic how I tried it but without success. Help me solve this and write correct code down. Thank you in advance.
This is my code :
from spex import *
import sys
class speX (Ui_MainWindow):
def __init__(self, window):
self.setupUi(window)
self.systemButton.clicked.setCurrentIndex(self, 0)
self.cpuButton.clicked.setCurrentIndex(self, 1)
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = speX (MainWindow)
MainWindow.show()
app.exec_()
I want this - when I click systemButton, activate tab indexed as 0, when click cpuButton activate tab indexed as 1.
Error provided there -
Traceback (most recent call last):
File "d:\spex\main.py", line 17, in <module>
ui = speX (MainWindow)
File "d:\spex\main.py", line 9, in __init__
self.systemButton.clicked.setCurrentIndex(self, 0)
AttributeError: 'PyQt5.QtCore.pyqtBoundSignal' object has no attribute 'setCurrentIndex'
This is example of my project - pyuic5 ui to py code
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'D:/spex/example.ui'
#
# Created by: PyQt5 UI code generator 5.13.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(763, 611)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.stackedWidget = QtWidgets.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(270, 70, 361, 361))
self.stackedWidget.setObjectName("stackedWidget")
self.page = QtWidgets.QWidget()
self.page.setObjectName("page")
self.buttonBox = QtWidgets.QDialogButtonBox(self.page)
self.buttonBox.setGeometry(QtCore.QRect(50, 310, 193, 28))
self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
self.buttonBox.setObjectName("buttonBox")
self.stackedWidget.addWidget(self.page)
self.page_2 = QtWidgets.QWidget()
self.page_2.setObjectName("page_2")
self.commandLinkButton = QtWidgets.QCommandLinkButton(self.page_2)
self.commandLinkButton.setGeometry(QtCore.QRect(70, 190, 222, 48))
self.commandLinkButton.setObjectName("commandLinkButton")
self.stackedWidget.addWidget(self.page_2)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(50, 110, 93, 28))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setGeometry(QtCore.QRect(50, 190, 93, 28))
self.pushButton_2.setObjectName("pushButton_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 763, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
self.stackedWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.commandLinkButton.setText(_translate("MainWindow", "CommandLinkButton"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
self.pushButton_2.setText(_translate("MainWindow", "PushButton"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
In Qt, a signal is emitted when a particular event occurs: a button is clicked, some text is changed, etc.
Signals are then connected to slots, which are functions that can react in some way to those signals. For example, you can create a slot that changes the text in a label, and connect it to a clicked signal of a button: then, when you click on that button, the text is changed.
Why your code does not work?
Well, for instance, setCurrentIndex is a method of a QStackedWidget (similarly to a QTabWidget), so the following doesn't make much sense:
self.systemButton.clicked.setCurrentIndex(self, 0)
Where is the reference to the stacked widget?
In PyQt, you can connect signals and slots like this:
someObject.signal.connect(someFunction)
Note that someFunction is a reference to that function; the following will not work:
someObject.signal.connect(someFunction())
If you want to change the index of a stacked widget after clicking on a button, you have to create a function that changes that index, and connect it to the clicked signal.
class speX (Ui_MainWindow):
def __init__(self, window):
self.setupUi(window)
self.pushButton.clicked.connect(self.goToSecondPage)
def goToSecondPage(self):
self.stackedWidget.setCurrentIndex(1)
I strongly suggest you to carefully study how python classes work and, generally speaking, the Object Oriented programming paradigm.
The simplist solution would be to connect your buttons to a function that changes the tab index on click
tabs = QtWidget.QTabWidget()
tab1 = QtWidget.QWidget()
tabs.addTab(self.tab1, "Tab 1")
systemButton.clicked.connect(tabIndex0)
def tabIndex0():
tabs.setCurrentIndex(0)
In my program there is a QGroupBox displayed that has many QPushButton's within it. During the execution of the program, the user can click a button outside of the QGroupBox and all of the buttons within it will be removed or hidden. Problem is that I can't seem to find a way to do this to the buttons directly or by clearing the QGroupBox.
I have already tried deleteLater on the buttons but that didn't work. I then tried clearing the layout of the QGroupBox but that didn't work either. Here is some code I just wrote up that has a the same problem:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def addButtons(self,looping):
# Code to remove the previous QPushButton's goes here.
placement = -100
for i in range(looping):
currentName = 'btn' + str(i)
placement = placement + 110
self.btnB = QtWidgets.QPushButton(self.groupBox)
self.btnB.setGeometry(QtCore.QRect(10+placement, 30+placement, 100, 100))
self.btnB.show()
self.btnB.setObjectName(currentName)
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.btnA.clicked.connect(self.pushed)
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def pushed(self):
unkownLength = random.randint(1,20)
self.addButtons(unkownLength)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = UI_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
There are things here that probably don't make sense like the window size, the multiple function calls or it being a Dialog window instead of a QMainWindow. However, in the context of the actual program they do make sense so just ignore that, I know it's inefficient. Also the whole point of the unkownLength variable is to emulate that in the actual program, the number of buttons generated will be determined by user input. The buttons must also not be there at the start so that is why they're created with a button click. When the button is clicked again it should remove or hide all the buttons it created before. Any ideas?
Taking advantage that the buttons are children of the QGroupBox we can get the buttons using findChildren() to use deleteLater():
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
class Dialog(QtWidgets.QDialog, UI_Dialog):
def __init__(self, parent=None):
super(Dialog, self).__init__(parent)
self.setupUi(self)
self.btnA.clicked.connect(self.pushed)
#QtCore.pyqtSlot()
def pushed(self):
unkownLength = random.randint(1, 20)
self.addButtons(unkownLength)
def addButtons(self, looping):
for button in self.groupBox.findChildren(QtWidgets.QPushButton):
button.deleteLater()
placement = -100
pos = QtCore.QPoint(20, 40)
for i in range(looping):
currentName = "btn" + str(i)
self.btnB = QtWidgets.QPushButton(
self.groupBox, objectName=currentName
)
self.btnB.setGeometry(QtCore.QRect(pos, QtCore.QSize(100, 100)))
pos += QtCore.QPoint(110, 110)
self.btnB.show()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Dialog()
w.show()
sys.exit(app.exec_())
I have made a UI which includes a mainwindow and a button that opens a dialog window. I want to send the current text changed signal from a line edit in the dialog window to the Mainwindow class as a variable. An example of the code I am making is below:
from PyQt5 import QtCore, QtGui, QtWidgets
from selenium import webdriver
import time
import threading
from bs4 import BeautifulSoup as soup
import requests
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(388, 179)
self.lineEdit_2 = QtWidgets.QLineEdit(Dialog)
self.lineEdit_2.setGeometry(QtCore.QRect(100, 100, 271, 21))
font = QtGui.QFont()
font.setFamily("Yu Gothic")
self.lineEdit_2.setFont(font)
self.lineEdit_2.setStyleSheet("background-color: transparent;\n"
"color: rgb(255, 255, 255);")
self.lineEdit_2.setObjectName("lineEdit_2")
class Dialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, parent=None):
QtWidgets.QDialog.__init__(self, parent)
self.setupUi(self)
# self.pushButton.pressed.connect(self.textEdit.clear)
# self.pushButton.pressed.connect(self.sejd)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
self.keyworddict = {}
self.count = {}
MainWindow.setObjectName("MainWindow")
MainWindow.resize(803, 538)
MainWindow.setMinimumSize(QtCore.QSize(0, 0))
MainWindow.setMaximumSize(QtCore.QSize(10000, 10000))
self.centralWidget = QtWidgets.QWidget(MainWindow)
self.centralWidget.setObjectName("centralWidget")
self.pushButton = QtWidgets.QPushButton(self.centralWidget)
self.pushButton.setGeometry(QtCore.QRect(180, 210, 75, 23))
font = QtGui.QFont()
font.setFamily("Yu Gothic")
font.setBold(True)
font.setWeight(75)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralWidget)
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
QtWidgets.QMainWindow.__init__(self, parent)
self.setupUi(self)
self.pushButton.pressed.connect(self.on_Button_clicked)
def on_Button_clicked(self):
dialog = QtWidgets.QDialog()
dialog.ui = Ui_Dialog()
dialog.ui.setupUi(dialog)
dialog.setWindowTitle("Login")
dialog.setAttribute(QtCore.Qt.WA_DeleteOnClose)
dialog.exec_()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.setWindowTitle("ui")
w.show()
sys.exit(app.exec_())
All help appreciated. I would preferably like an example using the code above.
There are at least two simple ways to do this. You can either connect a signal when the dialog is created, or just retrieve the text after the dialog closes:
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
...
def dialogTextChanged(self, text):
print(text)
def on_Button_clicked(self):
dialog = QtWidgets.QDialog()
dialog.ui = Ui_Dialog()
dialog.ui.setupUi(dialog)
# connect signal to slot
dialog.ui.lineEdit_2.textChanged.connect(self.dialogTextChanged)
dialog.setWindowTitle("Login")
# this is not needed
# dialog.setAttribute(QtCore.Qt.WA_DeleteOnClose)
dialog.exec_()
# or retrieve text after dialog closes
print(dialog.ui.lineEdit_2.text())
dialog.deleteLater()
If this is a login dialog, you should probably have an accept button which is connected to the dialog's accept() slot. Then you can check the exit status of the dialog like this:
if dialog.exec_() == QtWidgets.QDialog.Accepted:
text = dialog.ui.lineEdit_2.text()
# do sothing with text ...
dialog.deleteLater()
In python, using PyQt5 while moving from one tab page to another, need to move the widgets from source page to destination tab page using the index number.
I was trying the following code. But No idea. Can anybody guide me. Thanks
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(1251, 645)
self.tabWidget = QtWidgets.QTabWidget(Form)
self.tabWidget.setGeometry(QtCore.QRect(40, 40, 1161, 571))
self.tabWidget.setObjectName("tabWidget")
self.tab_1 = QtWidgets.QWidget()
self.tab_1.setObjectName("tab_1")
self.tabWidget.addTab(self.tab_1, "")
self.tab_2 = QtWidgets.QWidget()
self.tab_2.setObjectName("tab_2")
self.tabWidget.addTab(self.tab_2, "")
self.tabWidget.currentChanged.connect(self.header_Tab_Changed)
global TAB_OPTION
if TAB_OPTION==0:
self.pushButton = QtWidgets.QPushButton(self.tab_1)
self.pushButton.setGeometry(QtCore.QRect(290, 130, 631, 161))
self.pushButton.setObjectName("pushButton")
elif TAB_OPTION==1:
self.pushButton = QtWidgets.QPushButton(self.tab_2)
self.pushButton.setGeometry(QtCore.QRect(100, 100, 431, 61))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(Form)
self.tabWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(Form)
def header_Tab_Changed(self,index):
global TAB_OPTION
TAB_OPTION=index
#I need to move the push button between tabs ????????????????
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_1), _translate("Form", "First-Page"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("Form", "Second-Page"))
self.pushButton.setText(_translate("Form", "PushButton"))
if __name__ == "__main__":
import sys
global TAB_OPTION
TAB_OPTION=0
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_Form()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
I have created short application with Pyqt5 designer:
Here is the code:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(752, 674)
self.formLayout_2 = QtWidgets.QFormLayout(Form)
self.formLayout_2.setObjectName("formLayout_2")
self.formLayout = QtWidgets.QFormLayout()
self.formLayout.setObjectName("formLayout")
self.formLayout_2.setLayout(0, QtWidgets.QFormLayout.LabelRole, self.formLayout)
self.pushButton = QtWidgets.QPushButton(Form)
self.pushButton.setObjectName("pushButton")
self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.pushButton)
self.widget = QtWidgets.QWidget(Form)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(1)
sizePolicy.setHeightForWidth(self.widget.sizePolicy().hasHeightForWidth())
self.widget.setSizePolicy(sizePolicy)
self.widget.setStyleSheet("background-color:white;")
self.widget.setObjectName("widget")
self.formLayout_2.setWidget(2, QtWidgets.QFormLayout.FieldRole, self.widget)
self.pushButton_2 = QtWidgets.QPushButton(Form)
self.pushButton_2.setObjectName("pushButton_2")
self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.pushButton_2)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.pushButton.setText(_translate("Form", "Letters"))
self.pushButton_2.setText(_translate("Form", "Numbers"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Form = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())
This script is connected to appexe script(dialog):
import sys
from PyQt5 import QtWidgets, QtCore, QtGui
import string
from functools import partial
from setup_test import Ui_Form
from PyQt5.QtWidgets import QWidget, QGridLayout, QPushButton, QApplication
class myprog(Ui_Form):
def __init__ (self, dialog):
Ui_Form.__init__(self)
self.setupUi(dialog)
self.symbols = [string.ascii_lowercase, string.digits]
self.buttons = [self.pushButton, self.pushButton_2]
for i,v in enumerate(self.buttons):
self.buttons[i].clicked.connect(partial(self.application, i))
def application(self, i):
self.grid1 = QGridLayout(self.widget)
names = [x for x in self.symbols[i]]
positions = [(j,d) for j in range(7) for d in range(6)]
for a,b in zip(positions, names):
button = QPushButton(b)
self.grid1.addWidget(button, *a)
print(self.grid1.count())
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
dialog = QtWidgets.QDialog()
appexe = myprog(dialog)
dialog.show()
sys.exit(app.exec_())
I am new to Pyqt5. The basic idea is: whenever you click the button 'Letters' or button 'Numbers', the widget below should layout all the sysmbols within Letters or buttons.
If you do execute the appexe script, you can see, it works for the first try. (Please ignore the visual design). I am happy with the result. When button is pressed, it shows the buttons in grid(widget).
The problem I am facing is, how to clear the grid and it's widget when other button is hit > and display the new grid, new widgets.
If you look close, there is also a print statement:
print(self.grid1.count())
When I am in application and i am clicking letter and number button, it tells me how many widgets are within grid, however I just can't find a way how to display the new setup.
I would appreciate your help and your ideas. Thank you.
There are a number of different ways to remove a layout and its child widgets. However, the only one that seems to work properly with your particular example, is this one:
def application(self, i):
layout = self.widget.layout()
if layout is not None:
QWidget().setLayout(layout)
...
This works because setting the layout on a different widget will automatically re-parent that layout and all its children. Then when the temporary parent widget is immediately garbage-collected, Qt will automatically delete all its children as well.