Myujth

I have a problem when i'm trying to pop up a QMessageBox, with Pyqt5 Python 3.5
It is in the background not foreground.
I have tried different read on this forum, without success.
This QMessage is called when I click on the Save Button

My all code:

import os
import sys
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit, QFileDialog,QMessageBox
import pyqtgraph as pg
import pyqtgraph.exporters


class Ui_Viewer(QtWidgets.QMainWindow):

 def __init__(self, parent=None):
 self.parent = parent
 super(Ui_Viewer, self).__init__()
 self.central_widget = QtWidgets.QWidget()
 self.setCentralWidget(self.central_widget)

 def createWindow(self):
 self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
 self.setWindowTitle("My Viewer")
 self.resize(1280, 960)
 self.Button_Save = QtWidgets.QPushButton(self.central_widget)
 self.Button_Save.setGeometry(10, 10, 70, 30)
 self.Button_Save.setStyleSheet("background-color: rgb(109, 109, 109);")
 self.Button_Save.setText("Save")
 self.Button_Save.clicked.connect(self.process_Save_Figure)

 def process_Save_Figure(self):
 msgBox = QtWidgets.QMessageBox()
 msgBox.setWindowFlag(QtCore.Qt.WindowStaysOnTopHint)
 msgBox.warning(msgBox.setStyleSheet("background-color:gray;"), 'Information',
 "Save Data")

def main():
 app = QtWidgets.QApplication(sys.argv)
 MainWindow = Ui_Viewer()
 MainWindow.createWindow()
 MainWindow.show()

 rc = app.exec_()
 sys.exit(rc)


if __name__ == "__main__":
 main()

try this code:

 def process_Save_Figure(self):
 msgBox = QMessageBox()
 msgBox.warning(self, 'Information',"Save Data")

if it's works you can apply your style.

The problem disappears when I comment out the line self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)

(tested on PySide2)