This is entire my code:
import sys
from PySide2.QtCore import Qt
from PySide2.QtWidgets import (
QApplication,
QHBoxLayout,
QLabel,
QMainWindow,
QPushButton,
QVBoxLayout,
QWidget,
)
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
v = QVBoxLayout()
h = QHBoxLayout()
for a in range(10):
button = QPushButton(str(a))
button.clicked.connect(lambda checked, a=a: self.button_clicked(a)) # error here
h.addWidget(button)
v.addLayout(h)
self.label = QLabel("")
v.addWidget(self.label)
w = QWidget()
w.setLayout(v)
self.setCentralWidget(w)
def button_clicked(self, n):
self.label.setText(str(n))
app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec_()
When I run this code, I get a window like this:
Below the buttons, there is a QLabel, and I want when I click on any button, the button's label will refer to this QLabel, but I get a bunch of confusing errors in the terminal. What's wrong with my code, help me, thanks.
The clicked signal is overload so it accepts 2 signatures where it can send a bool or not. The default signature depends on the library, in this case it seems that PySide2 by default does not send the "checked" parameter, unlike PyQt5 that does.
The solution is to indicate the signature:
button.clicked[bool].connect(lambda checked, a=a: self.button_clicked(a))
Related
from PyQt6.QtWidgets import (
QMainWindow, QApplication, QDialog, QDialogButtonBox, QLabel, QTextEdit, QPushButton, QMessageBox, QMdiArea,
QTableWidgetItem, QStackedWidget
)
from PyQt6 import uic
import sys
class UI(QMainWindow):
def __init__(self):
super(UI, self).__init__()
uic.loadUi(r"C:\Users\csc\Documents\Rentour\front.ui", self)
self.show()
# define widgets
self.button = self.findChild(QPushButton, "signinButton")
self.signinButton.clicked.connect(self.OpenSignUp)
def OpenSignUp(self):
Sign_Up = Second()
widget.addWidget(Sign_Up)
widget.setCurrentIndex(widget.currentIndex()+1)
class Second(QMainWindow):
def __init__(self):
super(Second, self).__init__()
uic.loadUi(r"C:\Users\csc\Documents\Rentour\signpopup.ui", self)
# define widgets
self.button = self.findChild(QPushButton, "SubmitSignButton")
self.SubmitSignButton.clicked.connect(self.SignUpSave)
def SignUpSave(self):
email =self.EmailLine.text()
phoneno =self.PhonenoLine.text()
name =self.NameLine.text()
password = self.PasswordLine.text()
print(password)
app = QApplication(sys.argv)
mainwindow = UI()
widget = QStackedWidget()
widget.addWidget(mainwindow)
widget.show()
app.exec()
this is my code. Am trying to create a login/signup page. So when i click the signinButton, i want it to load the ui for the page which will have a bunch of line edits whose inputs im attempting to store in variables.
The ui files were made using qt designer and and i made this file from scratch. I also referred code with Hala(Youtuber). I Am trying to create a login/signup page. So when i click the signinButton, i want it to load the ui for the page which will have a bunch of line edits whose inputs im attempting to store in variables.
The problem is in your OpenSignUp function. The line widget.addWidget(Sign_Up) is not a valid command for a couple of reasons.
Also Sign_Up varable is holding a newly constructed QMainWindow, which are meant to be top level widgets and shouldn't be added to a layout.
It isn't totally clear what you are trying to achieve, but I am going to assume that you are trying to launch a secondary sign in window, In which case you want to use the open() method to launch the new window.
For example:
def OpenSignUp(self):
self.Sign_Up = Second()
self.Sign_Up.open()
Since you are using a stacked widget it is also possible that your goal is to simply switch to a different widget in the same window. In which case your Second class should probably just be a standard QWidget, and not a QMainWindow. and your stacked widget should be set as the central widget of your UI class.
So that would probably look something like this:
from PyQt6.QtWidgets import (
QMainWindow, QApplication, QDialog, QDialogButtonBox, QLabel, QTextEdit, QPushButton, QMessageBox, QMdiArea,
QTableWidgetItem, QStackedWidget
)
from PyQt6 import uic
import sys
class UI(QMainWindow):
def __init__(self):
super(UI, self).__init__()
# uic.loadUi(r"C:\Users\csc\Documents\Rentour\front.ui", self)
self.widget = QStackedWidget()
self.widget.addWidget(mainwindow)
self.setCentralWidget(self.widget)
self.Sign_Up = Second()
self.widget.addWidget(self.Sign_Up)
# define widgets
self.button = self.findChild(QPushButton, "signinButton")
self.signinButton.clicked.connect(self.OpenSignUp)
def OpenSignUp(self):
self.widget.setCurrentIndex(widget.currentIndex()+1)
class Second(QWidget):
def __init__(self):
super(Second, self).__init__()
uic.loadUi(r"C:\Users\csc\Documents\Rentour\signpopup.ui", self)
# define widgets
self.button = self.findChild(QPushButton, "SubmitSignButton")
self.SubmitSignButton.clicked.connect(self.SignUpSave)
def SignUpSave(self):
email =self.EmailLine.text()
phoneno =self.PhonenoLine.text()
name =self.NameLine.text()
password = self.PasswordLine.text()
print(password)
app = QApplication(sys.argv)
mainwindow = UI()
mainwindow.show()
app.exec()
Except you will need to rearrange the .ui file for UI class so that it is applied on top of the stacked widget as well.
I created a checkbox using PyQT, which normally works using mouse clicks.
I want to know if there is a way with which I can uncheck and check the checkbox using the program itself, and not a mouse click.
Basically I want to check and uncheck the box 10 times in 20 seconds and display it happening.
Here is my code for just the checkbox:
import sys
from PyQt5 import QtCore, QtWidgets
from PyQt5.QtWidgets import QMainWindow, QLabel, QCheckBox, QWidget
from PyQt5.QtCore import QSize
class ExampleWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setMinimumSize(QSize(140, 40))
self.setWindowTitle("Checkbox")
self.b = QCheckBox("Yes",self)
self.b.move(20,20)
self.b.resize(320,40)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
mainWin = ExampleWindow()
mainWin.show()
sys.exit( app.exec_() )
checked : bool
This property holds whether the button is checked
Only checkable buttons can be checked. By default, the button is unchecked.
The QTimer class provides repetitive and single-shot timers.
More ... https://doc.qt.io/qt-5/qtimer.html
import sys
from PyQt5 import QtCore, QtWidgets
from PyQt5.QtWidgets import QMainWindow, QLabel, QCheckBox, QWidget
from PyQt5.QtCore import QSize
class ExampleWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setMinimumSize(QSize(140, 40))
self.setWindowTitle("Checkbox")
self.b = QCheckBox("Yes",self)
self.b.move(20,20)
self.b.resize(320,40)
self.num = 0
self.timer = QtCore.QTimer()
self.timer.setInterval(2000) # msec
self.timer.timeout.connect(self.update_now)
self.timer.start()
def update_now(self):
self.b.setChecked(not self.b.isChecked()) # +++
self.num += 1
if self.num == 10: self.timer.stop()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
mainWin = ExampleWindow()
mainWin.show()
sys.exit( app.exec_() )
everyone.
I want to float a widget inside a layout of a main-window.
the widget is disappered from layout but not displayed on screen
As you can see from following code. I floated two labels 'lbl_title' and 'lbl_icon'
they seems to be floated but not displayed on screen.
Here comes my code.
If you loose commented line, then the lbl_icon and title is removed from layout but not are shown on my screen
from PyQt5.QtCore import QDir, Qt, QUrl
from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtWidgets import (QApplication, QFileDialog, QHBoxLayout, QLabel,
QPushButton, QSizePolicy, QSlider, QStyle, QVBoxLayout, QWidget)
from PyQt5.QtWidgets import QMainWindow,QWidget, QPushButton, QAction,QGridLayout
from PyQt5.QtGui import QIcon,QPixmap
import sys
from PyQt5.QtCore import *
class CommonLessonItem(QWidget):
def __init__(self,parent):
super(CommonLessonItem,self).__init__(parent)
self.lbl_title = QLabel(self)
self.lbl_description = QLabel(self)
self.lbl_icon = QLabel(self)
self.__initUI()
self.isChild = False
def __initUI(self):
#set layout
self.layout = QGridLayout(self)
self.layout.addWidget(self.lbl_title,0,0,1,19)
self.layout.addWidget(self.lbl_icon,0,19,1,1)
self.layout.addWidget(self.lbl_description,1,0,1,20)
self.lbl_icon.setWindowFlags(Qt.FramelessWindowHint|Qt.Window)
self.lbl_icon.move(100,100)
self.lbl_title.setWindowFlags(Qt.FramelessWindowHint|Qt.Window)
self.lbl_title.move(100,100)
#initialize info
self.setInfo("Title","Description",None)
self.setLayout(self.layout)
def setInfo(self,title,description,iconPath):
self.lbl_title.setText(title)
self.lbl_description.setText(description)
if(iconPath is not None):
self.lbl_icon.setPixmap(QPixmap(iconPath))
def moveEvent(self,event):
super().moveEvent(event)
if __name__ == "__main__":
app = QApplication(sys.argv)
mw = CommonLessonItem(None)
# mw.setSize(10,200)
mw.show()
sys.exit(app.exec_())
I need your help.
Whenever a widget becomes a top level window by setting the parent to None or, like in your case, setting the Window flag (but I wouldn't suggest that approach) show() must be called.
As explained in windowFlags:
Note: This function calls setParent() when changing the flags for a window, causing the widget to be hidden. You must call show() to make the widget visible again..
Add self.lbl_icon.show() and self.lbl_title.show() after changing their window state.
I have a class that displays a QMessageBox each time an action is performed. I was trying to set the button colour in the QMessageBox to a silver background.
At the moment the button is blue which is the same as the background of the QMessageBox.
My question is, how, with this piece of code: QtWidgets.qApp.setStyleSheet("QMessageBox QPushButton{background-color: Silver;}") can i change the QPushButton colour in the QMessageBox to silver.
This is a snippet of my code. I have tried to put the above snippet into the function so that when the button is clicked, the colour of the QPushButton in the message box will be silver. Is there a problem with this as it does not seem to make any change. Where should I place this styleSheet functionality in the code?
self.canonicalAddressesButton.clicked.connect(self.canonical_data_parsed_notification)
def canonical_data_parsed_notification(self):
QtWidgets.QMessageBox.information(self.mainwindow, 'Notification', 'Canonical Address Data Has Been Parsed!', QtWidgets.QMessageBox.Ok)
QtWidgets.qApp.setStyleSheet("QMessageBox QPushButton{background-color: Silver;}")
The setStyleSheet() method should be invoked before creating the QMessageBox. Here is the trivial example how you can do it:
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QMainWindow, QPushButton, qApp, QMessageBox
class App(QMainWindow):
def __init__(self):
super().__init__()
self.setGeometry(0, 0, 300, 200)
button = QPushButton('Click me', self)
qApp.setStyleSheet("QMessageBox QPushButton{background-color: Silver;}")
button.clicked.connect(self.button_clicked)
def button_clicked(self):
QMessageBox.information(self, 'Notification', 'Text', QMessageBox.Ok)
if __name__ == "__main__":
app = QApplication(sys.argv)
widget = App()
widget.show()
sys.exit(app.exec_())
I want to insert video in blue box(ui image) but I don't know how to insert video file.
My code is here.
I don't know how to add video... Just know example that make video player ...
import sys
from PyQt5 import QtWidgets
from PyQt5 import QtGui
from PyQt5 import uic
from PyQt5 import QtCore
from PyQt5.QtCore import QDir, Qt, QUrl, pyqtSlot
from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtWidgets import (QApplication, QFileDialog, QHBoxLayout, QLabel,
QPushButton, QSizePolicy, QSlider, QStyle, QVBoxLayout, QWidget)
dir_audience=''
dir_movie = ''
dir_export = ''
select_emotion = 'happy'
class Form(QtWidgets.QDialog):
def __init__(self, parent=None):
QtWidgets.QDialog.__init__(self, parent)
self.ui = uic.loadUi("highlight_export_form.ui", self)
self.ui.show()
self.ui.load_audience.clicked.connect(self.load_audience_clicked)
self.ui.load_movie.clicked.connect(self.load_movie_clicked)
self.ui.start_recog.clicked.connect(self.start_recog_clicked)
self.ui.radio_happy.toggled.connect(self.on_radio_button_toggled)
self.ui.radio_surprised.toggled.connect(self.on_radio_button_toggled)
def load_audience_clicked(self, event):
dir_audience, _ = QFileDialog.getOpenFileName(self, "Open Audience", QDir.homePath())
self.path_audience.setText(dir_audience)
def load_movie_clicked(self, event):
dir_movie, _ = QFileDialog.getOpenFileName(self, "Open Movie", QDir.homePath())
self.path_movie.setText(dir_movie)
def start_recog_clicked(self, event):
self.check_1.setText("start_recognition")
def on_radio_button_toggled(self):
if self.radio_happy.isChecked():
select_emotion='happy'
self.check_3.setText(select_emotion)
elif self.radio_surprised.isChecked():
select_emotion='surprised'
self.check_3.setText(select_emotion)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = Form()
sys.exit(app.exec())
Thank you for reading my question.
Qt Designer does not show all the Qt widget, and often we want to add our own widget through Qt, for that there are at least 2 solutions, the first is to create a plugin and load it to Qt Designer, and the other is simpler. promote the widget, the latter is what I will show in this answer.
For this you must make certain minimum changes, I do not know what type of widget is the one you use in the blue box but you must change it to the Widget type that is in the sub-menu of the containers as shown in the following image:
after them you must right click on the widget and select Promote to ..., then a dialogue will appear, in the part of Promoted class name you must place QVideoWidget, and in the part of Header File you must place PyQt5.QtMultimediaWidgets, then press the add button and then Promote:
After that you will be able to use QVideoWidget within your application.
In the following link there is an example
Answer from here was clearer to me:
QWebKit was removed in Qt 5.6. So QWebView is no longer available. Use QWebEngineView as a replacement. In Qt Designer, just add a QWidget to your form and promote it to QWebEngineView (base class: QWidget, header: QWebEngineView). Don't forget to add webenginewidgets to your project file.
Simlar issue: want add QWebEngineView into Qt Designer
for later PySide6 to import and use .ui, exported by Qt Designer
Solution: add QWidget then Promoted to QWebEngineView
Steps
drag a new QWidget into your main ui (window)
right click QWidget -> Promoted to
new popup window, input
Base class Name: QWidget
Promoted class Name: QWebEngineView
Header File: PySide6.QtWebEngineWidgets
== parent class
Global Include: not selected
-> Screenshot
click: Add
click: Promote