Creating the main window

As a first step, we will start with creating a main window by subclassing the QMainWindow class. The QMainWindow class has a constructor function that is similar to the QWidget class:

PySide.QtGui.QMainWindow([QWidget * parent = 0, Qt::WindowFlags flags = 0)

The parent can be any valid QWidget object, and flags can be a valid combination of Qt.WindowFlags. The following code excerpt explains how to create a main window application at a very basic level:

# Import required modules
import sys, time
from PySide.QtGui import QMainWindow,QApplication

# Our main window class
class MainWindow(QMainWindow):
    # Constructor function
    def __init__(self):
        super(MainWindow,self).__init__()
        self.initGUI()


    def initGUI(self):
        self.setWindowTitle("Main Window")
        self.setGeometry(300, 250, 400, 300)
        self.show()

if __name__ == '__main__':
    # Exception Handling
    try:

        myApp = QApplication(sys.argv)
        mainWindow = MainWindow...