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_()