一个用Python写的简易挂机锁

基本功能实现了，但是不够漂亮

屏蔽了Alt+F4，但是Ctrl+Alt+Del没能屏蔽

# -*- coding: utf-8 -*-u"""
一个挂机锁软件。author: Mpc
last edited: Mat 2014
"""import sys
import random
from PyQt4 import QtGui, QtCoreclass Example(QtGui.QWidget):def __init__(self):super(Example, self).__init__()self.initUI()def initUI(self):#Labellbl1 = QtGui.QLabel(u'密    码：', self)lbl1.setAlignment(QtCore.Qt.AlignRight)lbl2 = QtGui.QLabel(u'确认密码：', self)#LineEditself.le1 = QtGui.QLineEdit(self)self.le2 = QtGui.QLineEdit(self)#PushButtonokButton = QtGui.QPushButton("OK")okButton.clicked.connect(self.okButton_reponds)cancelButton = QtGui.QPushButton("Cancel")cancelButton.clicked.connect(self.cancelButton_reponds)#hbox1hbox1 = QtGui.QHBoxLayout()hbox1.addStretch(1)hbox1.addWidget(lbl1)hbox1.addWidget(self.le1)hbox1.addStretch(1)#hbox2hbox2 = QtGui.QHBoxLayout()hbox2.addStretch(1)hbox2.addWidget(lbl2)hbox2.addWidget(self.le2)hbox2.addStretch(1)#hbox3hbox3 = 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'挂机锁') 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'请键入密码！！')else:self.lockScreen = LockScreen()self.lockScreen.password_lock = self.le1.text()self.close()else:QtGui.QMessageBox.information(self, 'Error', u'密码不一致')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.setText('')class LockScreen(QtGui.QWidget):def __init__(self):super(LockScreen, self).__init__()self.initUI()#passwordself.password_lock = ''def initUI(self):#Labellbl1 = QtGui.QLabel(u'密    码：', self)lbl1.setAlignment(QtCore.Qt.AlignRight)lbl2 = QtGui.QLabel(u'挂机中.......请勿乱动！！', self)lbl2.setAlignment(QtCore.Qt.AlignRight)lbl2.setFont(QtGui.QFont(u"华文行楷", 50, 20))#LineEditself.le1 = QtGui.QLineEdit(self)#PushButtonokButton = QtGui.QPushButton("OK")okButton.clicked.connect(self.okButton_reponds)cancelButton = QtGui.QPushButton("Cancel")cancelButton.clicked.connect(self.cancelButton_reponds)#hbox1hbox1 = QtGui.QHBoxLayout()hbox1.addStretch(1)hbox1.addWidget(lbl1)hbox1.addWidget(self.le1)hbox1.addStretch(1)#hbox2hbox2 = QtGui.QHBoxLayout()hbox2.addStretch(1)hbox2.addWidget(lbl2)hbox2.addStretch(1)#hbox3hbox3 = 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.addLayout(hbox3)vbox.addStretch(1)self.setLayout(vbox)self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)self.showFullScreen()#backgroundimageself.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.SmoothTransformation)))palette.setBrush(QtGui.QPalette.Window, QtGui.QBrush(QtGui.QColor(170, 58, 146)))self.setPalette(palette)self.setWindowTitle(u'挂机锁') 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'请键入密码！！')elif (not (self.le1.text() == '') and not self.password_lock == self.le1.text()):QtGui.QMessageBox.information(self, 'Error', u'密码错误！！')self.le1.setText('')def keyPressEvent(self, event):keyEvent = QtGui.QKeyEvent(event)if keyEvent.key() == QtCore.Qt.Key_Return:self.okButton_reponds()#屏蔽Alt+F4def 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.exec_())if __name__ == '__main__':main()

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