passing arguments from python gtk function

问题

I am trying to pass the "filename" from the function on_file_open_clicked defined as:

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, Gdk, Pango

UI_INFO = """
<ui>
  <menubar name='MenuBar'>
      <menu action='FileMenu'>
      <menuitem action='FileOpen' />
      <menuitem action='FileQuit' />
    </menu>
  </menubar>
</ui>
"""

class MenuManager(Gtk.UIManager):

    def __init__(self):
        super().__init__()

        action_group = Gtk.ActionGroup("my_actions")
        self.add_file_menu_actions(action_group)
        self.add_ui_from_string(UI_INFO)
        self.insert_action_group(action_group)

    def add_file_menu_actions(self, action_group):
        action_group.add_actions([
            ("FileMenu", None, "New"),
            ("FileOpen", Gtk.STOCK_OPEN, None, None, None,
             self.file_open_clicked),
            ("FileQuit", Gtk.STOCK_QUIT, None, None, None,
             self.on_menu_file_quit),
        ])


    def file_open_clicked(self, widget):
        dialog = Gtk.FileChooserDialog("Open an existing fine", None,
                                       Gtk.FileChooserAction.OPEN,
                                       (Gtk.STOCK_CANCEL,
                                        Gtk.ResponseType.CANCEL,
                                        Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
        response = dialog.run()
        if response == Gtk.ResponseType.OK:
            filename = dialog.get_filename()
            print(filename)
        elif response == Gtk.ResponseType.CANCEL:
            print("Cancel clicked")
        dialog.destroy()


    def on_menu_file_quit(self, widget):
        Gtk.main_quit()

The calling function is defined as:

import gi
import menu
from pybib import parsing_read
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, Gdk, Pango

class MyWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="mkBiB")

        MenuElem = menu.MenuManager()
        menubar = MenuElem.get_widget("/MenuBar")
        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        box.pack_start(menubar, False, False, 0)
        self.add(box)
        print(filename)
win = MyWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()

obviously, since filename is not defined in calling function, it is giving error. But I don't know how to retrieve filename from on_file_open_clicked.

Kindly help.

Edit: Why I need the filename Since the program pasted above is a minimal one, I have not shown what I will do with the filename. Actually, the filename is a argument of another routine(that is pure python, nothing to do with gtk3). So, the calling and interface is like: in main

filename = "../Trial.bib"   #I am working with hardcoded file for now
                            # This is where I need filename from menu.
parsing_read(filename, booklist)

The parsing_read is:

def parsing_read(filename, booklist):

来源：https://stackoverflow.com/questions/34845929/passing-arguments-from-python-gtk-function

标签

python-3.x

parameter-passing

gtk3