python_gtk3/7_window_position.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Simple window - Just a simple window
# Copyright (c) 2016 Jorge Maldonado Ventura
#
# This file is part of Simple window
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import gi
import sys
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class Window(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title='Saludar')
        self.set_default_size(400, 300)
        self.set_border_width(140)
        self.set_position(Gtk.WindowPosition.CENTER)
        self.grid = Gtk.Grid()
        self.grid.set_column_homogeneous(True)

        self.user_name = Gtk.Entry()
        self.user_name.set_text('Introduce aquí tu nombre de usuario')
        self.passwd = Gtk.Entry()
        self.passwd.set_visibility(False)

        self.login_button = Gtk.Button('Iniciar sesión')
        self.login_button.connect('clicked', self.login)
        self.exit_button = Gtk.Button('Salir')
        self.exit_button.connect('clicked', self.exit)

        self.grid.attach(self.user_name, 0, 0, 2, 1)
        self.grid.attach(self.passwd, 0, 1, 2, 1)
        self.grid.attach(self.exit_button, 0, 2, 1, 1)
        self.grid.attach(self.login_button, 1, 2, 1, 1)
        self.add(self.grid)

    def login(self, widget):
        if self.passwd.get_text() == 'secreta':
            print('Bienvenido a tu cuenta, ' + self.user_name.get_text() + '.')
        else:
            print('Lo siento, la contraseña introducida es incorrecta.')
            sys.exit(1)

    def exit(self, widget):
        print('Hasta otra. Gracias por usar el programa.')
        sys.exit(0)

if __name__ == '__main__':
    win = Window()
    win.connect('delete-event', Gtk.main_quit)
    win.show_all()
    Gtk.main()