A Simple plug-in lock written in Python

Basic functions are implemented, but not beautiful enough

Alt + F4 is blocked, but Ctrl + Alt + Del is not blocked

#-*-Coding: UTF-8-*-u "is a built-in lock software. Author: Mpclast edited: Mat 2014 "import sysimport randomfrom PyQt4 import QtGui, QtCoreclass Example (QtGui. QWidget): def _ init _ (self): super (Example, self ). _ init _ () self. initUI () def initUI (self): # Label lbl1 = QtGui. QLabel (u'password: ', self) lbl1.setAlignment (QtCore. qt. alignRight) lbl2 = QtGui. QLabel (u'confirm password: ', self) # LineEdit self. le1 = QtGui. QLineEdit (self) self. le2 = QtGui. QLineEdit (self) # Pus HButton okButton = QtGui. QPushButton ("OK") okButton. clicked. connect (self. okButton_reponds) cancelButton = QtGui. QPushButton ("Cancel") cancelButton. clicked. connect (self. cancelButton_reponds) # hbox1 hbox1 = QtGui. QHBoxLayout () hbox1.addStretch (1) hbox1.addWidget (lbl1) hbox1.addWidget (self. le1) hbox1.addStretch (1) # hbox2 hbox2 = QtGui. QHBoxLayout () hbox2.addStretch (1) hbox2.addWidget (lbl2) hbox2.addW Idget (self. le2) hbox2.addStretch (1) # hbox3 hbox3 = QtGui. QHBoxLayout () hbox3.addStretch (1) hbox3.addWidget (okButton) hbox3.addWidget (cancelButton) hbox3.addStretch (1) vbox = QtGui. QVBoxLayout () vbox. addStretch (1) vbox. addLayout (hbox1) vbox. addLayout (hbox2) vbox. addLayout (hbox3) vbox. addStretch (1) self. setLayout (vbox) self. setGeometry (300,300,250,150) self. setWindowTitle (u'host lock') self. show () def OkButton_reponds (self): if not self. le1.text (). compare (self. le2.text (): if self. le1.text () = '': QtGui. QMessageBox. information (self, 'error', U'. Enter the password !! ') Else: self. lockScreen = LockScreen () self. lockScreen. password_lock = self. le1.text () self. close () else: QtGui. QMessageBox. information (self, 'error', u'inconsistent passwords ') self. le1.setText ('') self. le2.setText ('') def keyPressEvent (self, event): keyEvent = QtGui. QKeyEvent (event) if keyEvent. key () = QtCore. qt. key_Return: self. okButton_reponds () def cancelButton_reponds (self): self. le1.setText ('') self. le2.se TText ('') class LockScreen (QtGui. QWidget): def _ init _ (self): super (LockScreen, self ). _ init _ () self. initUI () # password self. password_lock = ''def initUI (self): # Label lbl1 = QtGui. QLabel (u'password: ', self) lbl1.setAlignment (QtCore. qt. alignRight) lbl2 = QtGui. QLabel (u'hanging ....... please do not tamper !! ', Self) lbl2.setAlignment (QtCore. qt. alignRight) lbl2.setFont (QtGui. QFont (u "文 ", 50, 20) # LineEdit self. le1 = QtGui. QLineEdit (self) # PushButton okButton = QtGui. QPushButton ("OK") okButton. clicked. connect (self. okButton_reponds) cancelButton = QtGui. QPushButton ("Cancel") cancelButton. clicked. connect (self. cancelButton_reponds) # hbox1 hbox1 = QtGui. QHBoxLayout () hbox1.addStretch (1) hbox1.addWidget (l Bl1) hbox1.addWidget (self. le1) hbox1.addStretch (1) # hbox2 hbox2 = QtGui. QHBoxLayout () hbox2.addStretch (1) hbox2.addWidget (lbl2) hbox2.addStretch (1) # hbox3 hbox3 = QtGui. QHBoxLayout () hbox3.addStretch (1) hbox3.addWidget (okButton) hbox3.addWidget (cancelButton) hbox3.addStretch (1) vbox = QtGui. QVBoxLayout () vbox. addStretch (1) vbox. addLayout (hbox2) vbox. addStretch (1) vbox. addLayout (hbox1) vbox. addLayo Ut (hbox3) vbox. addStretch (1) self. setLayout (vbox) self. setWindowFlags (QtCore. qt. windowStaysOnTopHint) self. showFullScreen () # backgroundimage self. setAutoFillBackground (True) palette = QtGui. QPalette () # palette. setBrush (QtGui. QPalette. window, QtGui. QBrush (QtGui. QPixmap ("g:/Python/pictures/" + str (random. randint (1,500) + ". jpg "). scaled (self. size (), QtCore. qt. ignoreAspectRatio, QtCore. qt. smoothTransfo Rmation) palette. setBrush (QtGui. QPalette. window, QtGui. QBrush (QtGui. QColor (170, 58,146) self. setPalette (palette) self. setWindowTitle (u'host lock') self. show () def okButton_reponds (self): if self. password_lock = self. le1.text (): QtCore. QCoreApplication. instance (). quit () elif self. le1.text () = '': QtGui. QMessageBox. information (self, 'error', U'. Enter the password !! ') Elif (not (self. le1.text () = '') and not self. password_lock = self. le1.text (): QtGui. QMessageBox. information (self, 'error', U' the password is incorrect !! ') Self. le1.setText ('') def keyPressEvent (self, event): keyEvent = QtGui. QKeyEvent (event) if keyEvent. key () = QtCore. qt. key_Return: self. okButton_reponds () # block Alt + F4 def closeEvent (self, event): event. ignore () def cancelButton_reponds (self): self. le1.setText ('') self. le2.setText ('') def main (): app = QtGui. QApplication (sys. argv) ex = Example () sys.exit(app.exe c _ () if _ name _ = '_ main _': main ()