data_dir = GLib.get_user_data_dir()
jotty_dir = os.path.join(data_dir, "jotty")
os.chdir(jotty_dir)

from jotty.OpenDialog import OpenDialog

JottyWindow.py

# -*- Mode: Python; coding: utf-8; indent-tabs-mode: nil; tab-width: 4 -*-
### BEGIN LICENSE
# This file is in the public domain
### END LICENSE

import gettext
from gettext import gettext as _
gettext.textdomain('jotty')

import os
from gi.repository import GLib # pylint: disable=E0611
from gi.repository import Gtk # pylint: disable=E0611
import logging
logger = logging.getLogger('jotty')

from jotty_lib import Window
from jotty.AboutJottyDialog import AboutJottyDialog
from jotty.PreferencesJottyDialog import PreferencesJottyDialog
from jotty.SaveDialog import SaveDialog
from jotty.OpenDialog import OpenDialog

# See jotty_lib.Window.py for more details about how this class works
class JottyWindow(Window):
    __gtype_name__ = "JottyWindow"
    
    def finish_initializing(self, builder): # pylint: disable=E1002
        """Set up the main window"""
        super(JottyWindow, self).finish_initializing(builder)

        self.AboutDialog = AboutJottyDialog
        self.PreferencesDialog = PreferencesJottyDialog

        # Code for other initialization actions should be added here.

    def on_mnu_save_activate(self, widget, data=None):
    #def save_file(self, widget, data=None):
        print "save"
        #get the title from the user
        saber = SaveDialog()
        result = saber.run()
        title = saber.title_text

        saber.destroy()
        if result != Gtk.ResponseType.OK:
            return

        #get the string
        buff = self.ui.textview1.get_buffer()
        start_iter = buff.get_start_iter()
        end_iter = buff.get_end_iter()
        text = buff.get_text(start_iter, end_iter, True)

        #create the filename
        data_dir = GLib.get_user_data_dir()
        jotty_dir = os.path.join(data_dir, "jotty")
        filename = os.path.join(jotty_dir, title)

        #write the data
        GLib.mkdir_with_parents(jotty_dir, 0o700)
        GLib.file_set_contents(filename, text)

    #def open_file(self, widget, data=None):
    def on_mnu_open_activate(self, widget, data=None):
        #get the name of the document to open
        opener = OpenDialog()
        result = opener.run()
        filename = opener.selected_file

        #close the dialog, and check whether to proceed
        opener.destroy()
        if result != Gtk.ResponseType.OK:
            return

        #try to get the data from the file if it exists
        try:
            success, text = GLib.file_get_contents(filename)
        except Exception:
            text = ""

        #set the UI to display the string
        buff = self.ui.textview1.get_buffer()
        buff.set_text(text)

    def on_mnu_new_activate(self, widget, data=None):
        self.ui.entry1.set_text("Note Title")
        buff = self.ui.textview1.get_buffer()
        buff.set_text("")

OpenDialog.py

# -*- Mode: Python; coding: utf-8; indent-tabs-mode: nil; tab-width: 4 -*-
### BEGIN LICENSE
# This file is in the public domain
### END LICENSE

from gi.repository import Gtk # pylint: disable=E0611

from jotty_lib.helpers import get_builder

import gettext
from gettext import gettext as _
gettext.textdomain('jotty')

import os
from quickly.widgets.dictionary_grid import DictionaryGrid
from gi.repository import GLib # pylint: disable=E0611

class OpenDialog(Gtk.Dialog):
    __gtype_name__ = "OpenDialog"

    def __new__(cls):
        """Special static method that's automatically called by Python when 
        constructing a new instance of this class.
        
        Returns a fully instantiated OpenDialog object.
        """
        builder = get_builder('OpenDialog')
        new_object = builder.get_object('open_dialog')
        new_object.finish_initializing(builder)
        return new_object

    def finish_initializing(self, builder):
        """Called when we're finished initializing.

        finish_initalizing should be called after parsing the ui definition
        and creating a OpenDialog object with it in order to
        finish initializing the start of the new OpenDialog
        instance.
        """
        # Get a reference to the builder and set up the signals.
        self.builder = builder
        self.ui = builder.get_ui(self)
        
        #get the jotty document names
        data_dir = GLib.get_user_data_dir()
        jotty_dir = os.path.join(data_dir, "jotty")
        filenames = os.listdir(jotty_dir)
        
        #put them into a grid
        dicts = [{'Name': x, 'File': os.path.join(jotty_dir, x)} for x in filenames]
        self.grid = DictionaryGrid(dictionaries=dicts, keys=['Name'])
        
        #add grid to dialog
        self.grid.show()
        self.ui.box1.pack_end(self.grid, True, True, 0)

    def on_btn_ok_clicked(self, widget, data=None):
        """The user has elected to save the changes.

        Called before the dialog returns Gtk.ResponseType.OK from run().
        """
        pass

    def on_btn_cancel_clicked(self, widget, data=None):
        """The user has elected cancel changes.

        Called before the dialog returns Gtk.ResponseType.CANCEL for run()
        """
        pass
        
    @property
    def selected_file(self):
        rows = self.grid.selected_rows
        if len(rows) < 1:
            return None
        else:
            return rows[0]['Name']


if __name__ == "__main__":
    dialog = OpenDialog()
    dialog.show()
    Gtk.main()