New window not spawning

Fuchsiaff

So this has always worked for me but now for some reason, when using mousePressEvent() I can't seem to spawn a new window.

Here's my code for the Window class that is supposed to be shown.

from PyQt5.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QLabel, QFrame, QMainWindow
from PyQt5.QtCore import Qt


class Window(QWidget):

    def __init__(self, parent=None):
        super().__init__(parent)

        self.layout_main = QHBoxLayout()

        self.layout_main.addWidget(QPushButton("Terminate"))

        self.setLayout(self.layout_main)

And here's the class that is supposed to show that when pressing on it:

from PyQt5.QtWidgets import QLabel, QHBoxLayout, QFrame


class Item(QFrame):

    def __init__(self, tootja, toode, jalanumber, kogus, hind, bold):
        super().__init__()

        if bold:
            self.setStyleSheet("QLabel { font-weight: bold; font-size: 15;}")

        self.layout_main = QHBoxLayout()

        self.tootja = tootja
        self.toode = toode
        self.jalanumber = jalanumber
        self.kogus = kogus
        self.hind = hind

        self.tootja_label = QLabel(self.tootja)
        self.toote_label = QLabel(self.toode)
        self.jala_label = QLabel(self.jalanumber)
        self.kogus_label = QLabel(self.kogus)
        self.hind_label = QLabel(self.hind)

        self.layout_main.addWidget(self.tootja_label)
        self.layout_main.addWidget(self.toote_label)
        self.layout_main.addWidget(self.jala_label)
        self.layout_main.addWidget(self.kogus_label)
        self.layout_main.addWidget(self.hind_label)

        self.setLayout(self.layout_main)

    def mousePressEvent(self, event):
        from widgets.Popup import Window

        l = Window()
        print(l)
        print("Shown")
        l.show()

It does print "Shown" but windows are not appearing for some reason.

jsulm

@Fuchsiaff It's because l is a local variable and is destroyed as soon as mousePressEvent finishes...

Fuchsiaff

@jsulm said in New window not spawning:

@Fuchsiaff It's because l is a local variable and is destroyed as soon as mousePressEvent finishes...

But when I added a button that when pressed, executed this code:

from widgets.Popup import Window

        l = Window()
        print(l)
        print("Shown")
        l.show()

Then it still didn't show after I clicked on the button

jsulm

@Fuchsiaff Again: l is DELETED as soon as the method finishes.
Either make l member variable or call exec() instead of show()

def mousePressEvent(self, event):
        from widgets.Popup import Window

        l = Window()
        print(l)
        print("Shown")
        l.show()
// HERE l IS DELETED

Fuchsiaff

@jsulm

Got it, thanks!