QFrame Background Color overlapped with other Widgets like QLineEdit, QListBoxWidget, etc. How to avoid it?

Question

In my Programme,

QLineEdit and QListWidget Placed in QVBoxLayout. And then QVBoxLayout put in a QFrame with Stylesheet of background-color:orange.

QLineEdit and QListWidget also get the same background-color of QFrame. How to avoid the background color overlapping ? .

Suppose, If we change the background color of QListwidget by style sheet, then scroll bar color also changed to QListWidget color.

How to avoid it?, I Need a native style layout ?

import sys
from PyQt5.QtCore    import *
from PyQt5.QtGui     import *
from PyQt5.QtWidgets import *

item = ["Python", "Python 2.7", "Python 2.9", "Python 3.5", "Python 3.7", "National", "Zebra",
                "Apple", "X Ray","Boat", "Tiger", "Item001", "Item002", "Item003", "Item004", "Item005",
                "001Item", "002Item", "003Item","004Item", "005Item", "Ball", "Cat", "Dog", "Fish",
                "Gold Fish", "Star Fish"]


class myList(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Frame Example")
        self.myui()

    def myui(self):

        self.textbox = QLineEdit(self)
        self.listbox = QListWidget(self)
        self.listbox.addItems(item)

        vbox = QVBoxLayout()
        vbox.addWidget(self.textbox)
        vbox.addWidget(self.listbox)

        frame = QFrame()
        frame.setLayout(vbox)
        frame.setStyleSheet("background-color:orange")

        main_layout =QHBoxLayout()
        main_layout.addWidget(frame)
        self.setLayout(main_layout)

def main():
    myapp = QApplication(sys.argv)
    mywin = myList()
    mywin.show()
    sys.exit(myapp.exec_())

if __name__ == '__main__':
    main()

Answer 1

You have to set a selector (for example the objectName) in addition to indicating the class it will affect:

frame = QFrame()
frame.setObjectName("frame")
frame.setLayout(vbox)
frame.setStyleSheet("QFrame#frame{background-color:orange}")

For more details I recommend reading the Qt docs:

• https://doc.qt.io/Qt-5/stylesheet-syntax.html
• https://doc.qt.io/qt-5/stylesheet-reference.html