Questions tagged [qapplication]
The QApplication class is part of the Qt C++ classes manages the GUI application's control flow and main settings.
qapplication
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'Module {Module_Name} not installed' when running python script using PyQt5
I am trying to build a UI using PyQt5 and python. I built a base using main.qml and some styled qml files in the same directory and it imported fine, but I decided to break everything up into folders ...
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22
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While using Pyside2 I've got : QWidget: Must construct a QApplication before a QWidget
I'm trying to re-implement the scikit-surgerytutorial01 so I exactly followed all steps indicated in the documentation and I created a virtual environment where I installed all requirements with ...
- 11
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22
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How to correctly use a pyqt5 QTimer and QThreadPool together in QApplication
I am currently trying to use a QTimer object in order to poll an api for differences to the current application but it is never running. I don't know if it is because it's being skipped in my init ...
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30
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Why does the application exit when closing a QMessageBox with an invisible parent window? [duplicate]
This is a boiled down simple example:
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QTimer>
class MainWindow : public QMainWindow
{
...
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Problem with displaying Charts in qml project: MUTEX problem
I'am beginner in qml and I have this kind of problem. I wanted to display chart in qml and someone adviced me to change QGuiApplication to QApplication in main.cpp. It was working for a few hours, but ...
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1
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69
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QT5's QApplication::setOverrideCursor(Qt::WaitCursor); is blocking the previous operations
In my loadDatabase function, I have clearly set the status to display the message "loading coverage database..." before setOverrideCursor(Qt::WaitCursor), but the status bar is only ...
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2
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7k
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AttributeError: module 'pyqtgraph.Qt.QtGui' has no attribute 'QApplication'."
Details about my system;
Ubunttu 22.04.2 LTS x86_64
pyqtgraph v0.13.1
pyhton v3.10
The code I'm trying to run on line 56;
from pyqtgraph.Qt import QtGui, QtCore
import pyqtgraph as pg
app = QtGui....
- 253
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97
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QApplication freeze sometimes, if i import QWebEngineView
from PyQt6.QtWidgets import QApplication
from PyQt6.QtWebEngineWidgets import QWebEngineView
import sys
print("0")
app = QApplication(sys.argv)
print("1")
if i remove that line
...
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88
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How to check filtered item in checkable ComboBox?
If an item in the list is selected using a filter, it becomes non-checkable. For filter I use functions: on_completer_activated, setModel, setModelColumn. I added a filter model to filter matching ...
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python QApplication freezes and does not close while another thread is running
In the main file i run a Qapplication in the main thread (that starts with no problem) and a method on a separate thread , called backupGiornaliero.
When I try to close the application via the X ...
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1
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247
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Pushing QWidget Window to topmost in Python
I'm new to Python and have mostly learnt C# in the past. I am creating a QWidget class:
class Window(QWidget):
def __init__(self, gif, width, height):
super().__init__()
self....
- 25
1
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1
answer
439
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can't install katalon on ubuntu 22.04
I'm trying to install katalon studio on ubunut. But it keeps giving me the following error:
sudo apt-get install openjdk-8-jre
sudo update-alternatives --config java //then choose the openjdk-8-jre ...
- 81
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Cannot Close Spyder with PyQt5 [duplicate]
I need your help!
I built a GUI with PyQt5 and my IDE is Spyder!
When I run PyQt in Spyder I cannot close it. What's the problem?
Also when I run it a second time, the menubar disappears...
import sys
...
- 63
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1
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203
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'NoneType' error when calling QApplication(sys.argv), pycharm
I'm new to PySide2 and I'm facing this issue while creating super simple window with PySide2 and Pycharm: Qapplication() error :'NoneType'; both with sys.argv as argument and without any argument the ...
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Qt , how to create QApplication without argc and argv
Hey so I need to export a qt application as a .dll and , so I dont want any arguments like argc and argv , but QApplication needs them , so i tried this
int main()
{
int c=1;
char** v = (char**...
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