from gi.repository import Gtk

import sys

actions = [["Select", None],

           ["New", Gtk.STOCK_NEW],

           ["Open", Gtk.STOCK_OPEN],

           ["Save", Gtk.STOCK_SAVE]]

class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):

        Gtk.Window.__init__(self, title="Welcome to GNOME", application=app)

        self.set_default_size(200, -1)

        self.set_border_width(10)

        # the data in the model, of type string on two columns

        listmodel = Gtk.ListStore(str, str)

        # append the data

        for i in range(len(actions)):

            listmodel.append(actions[i])

        # a combobox to see the data stored in the model

        combobox = Gtk.ComboBox(model=listmodel)

        # cellrenderers to render the data

        renderer_pixbuf = Gtk.CellRendererPixbuf()

        renderer_text = Gtk.CellRendererText()

        # we pack the cell into the beginning of the combobox, allocating

        # no more space than needed;

        # first the image, then the text;

        # note that it does not matter in which order they are in the model,

        # the visualization is decided by the order of the cellrenderers

        combobox.pack_start(renderer_pixbuf, False)

        combobox.pack_start(renderer_text, False)

        # associate a property of the cellrenderer to a column in the model

        # used by the combobox

        combobox.add_attribute(renderer_text, "text", 0)

        combobox.add_attribute(renderer_pixbuf, "stock_id", 1)

        # the first row is the active one at the beginning

        combobox.set_active(0)

        # connect the signal emitted when a row is selected to the callback

        # function

        combobox.connect("changed", self.on_changed)

        # add the combobox to the window

        self.add(combobox)

    def on_changed(self, combo):

        # if the row selected is not the first one, write on the terminal

        # the value of the first column in the model

        if combo.get_active() != 0:

            print("You chose " + str(actions[combo.get_active()][0]) + "\n")

        return True

class MyApplication(Gtk.Application):

    def __init__(self):

        Gtk.Application.__init__(self)

    def do_activate(self):

        win = MyWindow(self)

        win.show_all()

    def do_startup(self):

        Gtk.Application.do_startup(self)

app = MyApplication()

exit_status = app.run(sys.argv)

sys.exit(exit_status)