Event filter for QtabWidget (PySide6)

[electric-dev]

Hello good evening ,I am creating an event filter so that when a number entered to a Qspinbox exceeds the number 10,you can not access the tabs of a QtabWidget.

The problem I have is that if the application is minimized when the value of the QSpinbox exceeds the number 10 the tabs disappear and until this value decreases and I pass the mouse over where the tabs should be, they are not shown.
This is the code I have so far:

import sys

from PySide6.QtWidgets import QApplication, QLabel, QMainWindow, QSpinBox, QTabWidget, QWidget


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setFixedSize(400, 200)
        a = QWidget()
        b = QWidget()
        self.tab = QTabWidget(self)
        self.tab.addTab(a, "Hola")
        self.tab.addTab(b, "Saludos")
        self.setCentralWidget(self.tab)
        self.tab.tabBar().installEventFilter(self)
        self.boton1 = QSpinBox(a)
        self.boton1.setGeometry(20, 20, 130, 30)
        self.boton1.setValue(5)

        self.label = QLabel("Now you see it", b)
        self.label.setGeometry(140, 40, 80, 60)


    def eventFilter(self, object, event):
        if object == self.tab.tabBar() and self.boton1.value() > 10:
            return True
        else:
            return False


app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()

I hope you can help me

[electric-dev]

Thank you so much ,it works that way ,on the other hand ,i dont limit the values because it is needed that way

[Pl45m4]

@electric-dev

Hi and welcome to the forum,

The main problem is, that you block EVERY event that is coming from or going to the tabBar when value > 10...
so also events, that are required to make the widget/app run and get drawn smoothly.

def eventFilter(self, object, event):
    if object == self.tab.tabBar() and self.boton1.value() > 10:
        return True
    else:
        return False

Actually you don't need an eventFilter at all.
I think using a signal from your QSpinBox to disable the QTabWidget (or QTabBar) is a better approach.

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setFixedSize(400, 200)
        a = QWidget()
        b = QWidget()
        self.tab = QTabWidget(self)
        self.tab.addTab(a, "Hola")
        self.tab.addTab(b, "Saludos")
        self.setCentralWidget(self.tab)

        self.boton1 = QSpinBox(a)
        self.boton1.setGeometry(20, 20, 130, 30)
        self.boton1.setValue(5)

        self.label = QLabel("Now you see it", b)
        self.label.setGeometry(140, 40, 80, 60)

        self.boton1.valueChanged.connect(self.handleSpinBoxValue)


    def handleSpinBoxValue(self, value):
        
         if value > 10:
            self.tab.tabBar().setDisabled(True)
         else:
            self.tab.tabBar().setDisabled(False)


app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()

Works like this:

I did it in C++, but the Python code above should work.
(Note: when other people should use your app, you should inform the user somehow that a value greater than 10 disables the other tabs)

While writing this:
Why don't you limit the maximum value of your spinBox? So that it's never above 10?!

self.boton1.setRange(0, 10)
self.boton1.setValue(5)

Or should higher numbers still be possible?

[electric-dev]

Thank you so much ,it works that way ,on the other hand ,i dont limit the values because it is needed that way