ΘΕΜΑ: PyQt4 / PySide : Menu

from __future__ import division
from __future__ import print_function
 
import sys
import PySide.QtCore as QtCore
import PySide.QtGui as QtGui
 
 
class MenuExample(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MenuExample, self).__init__(parent)
        self.setWindowTitle("PyQt/PySide menus example")
 
        self.statusBar()
        self.create_menu()
 
    def on_load_file(self, filename=None):
        print("You clicked the filemenu option 'Load file")
 
    def on_new_file(self):
        print("You clicked the filemenu option 'New file")
 
    def on_about(self):
        msg = """Text appearing in the about dialog of our application."""
        QtGui.QMessageBox.about(self, "About the demo", msg.strip())
 
    def create_menu(self):
        # Create the menu Bar.
        self.menubar = self.menuBar()   # Inheriting from QMainWindow
 
        # Add menus to the menu Bar.
        self.file_menu = self.menubar.addMenu("&File")
        self.edit_menu = self.menubar.addMenu("&Edit")
        self.help_menu = self.menubar.addMenu("&Help")
 
        # Create File menu's actions
        new_action = self.create_action("&New file",
                                        shortcut = "Ctrl+N",
                                        slot = self.on_new_file,
                                        tip = "Create a new file")
 
        load_action = self.create_action("&Load file",
                                         shortcut="Ctrl+L",
                                         slot=self.on_load_file,
                                         tip="Load a file")
 
        quit_action = self.create_action("&Quit",
                                         shortcut="Ctrl+Q",
                                         slot=self.close,
                                         tip="Close the application")
 
        # Add file menu's actions to the menu
        self.add_actions(self.file_menu,
                         new_action, load_action, None, quit_action)
 
        #Create Help Menu's actions.
        about_action = self.create_action("&About",
                                          shortcut='F1',
                                          slot=self.on_about,
                                          tip='About the demo')
 
        # Add Help menu's actions to the menu
        self.add_actions(self.help_menu, about_action)
 
    def add_actions(self, target, *actions):
        for action in actions:
            if action is None:
                target.addSeparator()
            else:
                target.addAction(action)
 
    def create_action(self, text, slot=None, shortcut=None, icon=None, tip=None,
                      checkable=False, signal="triggered()"):
        action = QtGui.QAction(text, self)
        if icon is not None:
            action.setIcon(QIcon(":/%s.png" % icon))
        if shortcut is not None:
            action.setShortcut(shortcut)
        if tip is not None:
            action.setToolTip(tip)
            action.setStatusTip(tip)
        if slot is not None:
            self.connect(action, QtCore.SIGNAL(signal), slot)
        if checkable:
            action.setCheckable(True)
        return action
 
 
def main():
    app = QtGui.QApplication(sys.argv)
    form = MenuExample()
    form.show()
    sys.exit(app.exec_())
 
if __name__=='__main__':
    main()