parent child relation in a pyqt window

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I am trying to launch a a child window from a window that should always be parent.

I am not getting any error and everything seems fine to me, is it something that I am missing?

import sys
from PyQt4 import QtCore, QtGui

print __file__

class ParentWindow(QtGui.QMainWindow):
    """docstring for ParentWindow"""
    def __init__(self, parent=None):
        super(ParentWindow, self).__init__(parent)
        self.setWindowTitle("Parent Window")
        self.setGeometry(300, 300, 250, 150)
        self._setupUi()
        self._connections()

    def _setupUi(self):
        self.btn = QtGui.QPushButton("Launch child window in child thread")
        self.setCentralWidget(self.btn)


    def _connections(self):
        self.btn.clicked.connect(self.callChild)

    @QtCore.pyqtSlot()
    def callChild(self):
        childObj = ChildWindow()
        childObj.setParent(self)

class ChildWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(ChildWindow, self).__init__(parent)
        self.setWindowTitle("Child Window")
        print "working"
        self.byeBtn = QtGui.QPushButton("Bye", self)
        self.childLayout = QtGui.QVBoxLayout()
        self.childLayout.addWidget(self.byeBtn)
        self.setLayout(self.childLayout)
        self.byeBtn.clicked.connect(self.close)
        self.show()

    def setWindowFlags(self, flags):
        print "flags value in setWindowFlags"
        print flags
        super(ChildWindow, self).setWindowFlags(flags)


def main():
    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('Parent')
    pWinObj = ParentWindow()
    pWinObj.show()

    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

If I pass self the the childObj then the child window widget goes inside ParentWindow.

asked 33 secs ago

san

414