复制代码 代码如下:

import sys

from PyQt4 import QtGui, QtCore

class Window( QtGui.QMainWindow):

def __init__(self):

QtGui.QMainWindow.__init__(self)

self.setWindowTitle('hello')

self.resize(800,500)

menubar = self.menuBar()

self.file = menubar.addMenu('&file')

open = self.file.addAction('open')

self.connect(open,QtCore.SIGNAL('triggered()'),self.OnOpen)

save =self.file.addAction('save')

self.connect(save,QtCore.SIGNAL('triggered()'),self.OnSave)

self.file.addSeparator()

close = self.file.addAction('close')

self.connect(close,QtCore.SIGNAL('triggered()'),self.OnClose)

self.label = QtGui.QLabel('this is a google text')

self.label.setAlignment(QtCore.Qt.AlignCenter)

self.setCentralWidget(self.label)

def OnOpen(self):

self.label.setText('open')

def OnClose(self):

self.close()

def OnSave( self):

self.label.setText('save')

def contextMenuEvent(self,event):

self.file.exec_( event.globalPos())

app =QtGui.QApplication(sys.argv)

win = Window()

win.show()

app.exec_()