QDialog - Prevent Closing in Python and PyQt -

i have login screen dialog written using pyqt , python , shows dialog pup when runs , can type in certin username , password unlock basicly. it's simple made in learning pyqt. i'm trying take , use somewhere else need know if there way prevent using x button , closing have stay on top of windows cant moved out of way? possible? did research , couldn't find me.

edit:

as requested here code:

from pyqt4 import qtgui  class test(qtgui.qdialog):      def __init__(self):             qtgui.qdialog.__init__(self)             self.textusername = qtgui.qlineedit(self)             self.textpassword = qtgui.qlineedit(self)             self.loginbuton = qtgui.qpushbutton('test login', self)             self.loginbuton.clicked.connect(self.login)             layout = qtgui.qvboxlayout(self)             layout.addwidget(self.textusername)             layout.addwidget(self.textpassword)             layout.addwidget(self.loginbuton)      def login(self):            if (self.textusername.text() == 'test' ,                self.textpassword.text() == 'password'):                self.accept()            else:                  qtgui.qmessagebox.warning(                  self, 'wrong', 'incorrect user or password')  class window(qtgui.qmainwindow):     def __init__(self):         qtgui.qmainwindow.__init__(self)  if __name__ == '__main__':      import sys     app = qtgui.qapplication(sys.argv)      if test().exec_() == qtgui.qdialog.accepted:         window = window()         window.show()         sys.exit(app.exec_()) 

bad news first, not possible remove close button window, based on riverbank mailing system

you can't remove/disable close button because handled window manager, qt can't there.

good news, can override , ignore, when user sends event, can ignore or put message or something.

read article ignoring qcloseevent

also, take @ question, how catch pyqt closeevent , minimize dialog instead of exiting?

which uses this:

class mydialog(qtgui.qdialog):     # ...     def __init__(self, parent=none):         super(mydialog, self).__init__(parent)          # when want destroy dialog set true         self._want_to_close = false      def closeevent(self, evnt):         if self._want_to_close:             super(mydialog, self).closeevent(evnt)         else:             evnt.ignore()             self.setwindowstate(qtcore.qt.windowminimized)