复制代码 代码如下:

coding=utf-8

对话框

import sys
from PyQt4 import QtGui, QtCore
class Window( QtGui.QWidget ):
def init( self ):
super( Window, self ).init()
self.setWindowTitle( "hello" )
self.resize( 500, 500 )

    gridlayout = QtGui.QGridLayout()  

    self.AboutButton = QtGui.QPushButton( "About" )  
    gridlayout.addWidget( self.AboutButton, 0, 0 )  
    self.AboutQtButton = QtGui.QPushButton( "AboutQt" )  
    gridlayout.addWidget( self.AboutQtButton, 0, 1 )  
    self.CriticalButton = QtGui.QPushButton( "CriticalButton" )  
    gridlayout.addWidget( self.CriticalButton, 1, 0 )  
    self.InfoButton = QtGui.QPushButton( "Info" )  
    gridlayout.addWidget( self.InfoButton, 1, 1 )  
    self.QuestionButton = QtGui.QPushButton( "Question" )  
    gridlayout.addWidget( self.QuestionButton, 2, 0 )  
    self.WarningButton = QtGui.QPushButton( "Warning" )  
    gridlayout.addWidget( self.WarningButton, 2, 1 )  

    spacer = QtGui.QSpacerItem( 200, 80 )  
    gridlayout.addItem( spacer, 3, 1, 1, 5 )  
    self.setLayout( gridlayout )  

    self.connect( self.AboutButton, QtCore.SIGNAL( 'clicked()' ), self.OnAboutButton )  
    self.connect( self.AboutQtButton, QtCore.SIGNAL( 'clicked()' ), self.OnAboutQtButton )  
    self.connect( self.CriticalButton, QtCore.SIGNAL( 'clicked()' ), self.OnCriticalButton )  
    self.connect( self.InfoButton, QtCore.SIGNAL( 'clicked()' ), self.OnInfoButton )  
    self.connect( self.QuestionButton, QtCore.SIGNAL( 'clicked()' ), self.OnQuestionButton )  
    self.connect( self.WarningButton, QtCore.SIGNAL( 'clicked()' ), self.OnWarningButton )  

def OnAboutButton( self ):  
    QtGui.QMessageBox.about( self, 'PyQt', "About" )  

def OnAboutQtButton( self ):  
    QtGui.QMessageBox.aboutQt( self, "PyQt" )  

def OnCriticalButton( self ):  
    r = QtGui.QMessageBox.critical( self, "PyQT", "CriticalButton", QtGui.QMessageBox.Abort,  
                               QtGui.QMessageBox.Retry, QtGui.QMessageBox.Ignore )  
    if r == QtGui.QMessageBox.Abort:  
        self.setWindowTitle( "Abort" )  
    elif r == QtGui.QMessageBox.Retry:  
        self.setWindowTitle( "Retry" )  
    elif r == QtGui.QMessageBox.Ignore:  
        self.setWindowTitle( "Ignore" )  
    else:  
        pass  

def OnInfoButton( self ):  
    QtGui.QMessageBox.information( self, "Pyqt", "information" )  

def OnQuestionButton( self ):  
    r = QtGui.QMessageBox.question( self, "PyQt", "Question", QtGui.QMessageBox.Yes, QtGui.QMessageBox.No, QtGui.QMessageBox.Cancel )  

def OnWarningButton( self ):  
    r = QtGui.QMessageBox.warning( self, "PyQT", "warning", QtGui.QMessageBox.Yes, QtGui.QMessageBox.No )  

app = QtGui.QApplication( sys.argv )
win = Window()
win.show()
app.exec_()