#!/usr/bin/python3

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

class AppWindow(Gtk.ApplicationWindow):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.set_border_width(10)
        button = Gtk.Button.new()
        hbox = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=0)
        icon_theme = Gtk.IconTheme.get_default()
        icon = icon_theme.load_icon("window-close", -1, 
                                    Gtk.IconLookupFlags.FORCE_SIZE)
        image = Gtk.Image.new_from_pixbuf(icon)
        hbox.add(image)
        label = Gtk.Label.new_with_mnemonic("_Close")
        hbox.add(label)
        hbox.set_homogeneous(True)
        button.add(hbox)
        button.connect("clicked", self.on_button_clicked)
        button.set_relief(Gtk.ReliefStyle.NORMAL)
        self.add(button)
        self.set_size_request(230, 100)

    def on_button_clicked(self, param):
        self.destroy()

class Application(Gtk.Application):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, application_id="org.example.myapp",
                         **kwargs)
        self.window = None

    def do_activate(self):
        if not self.window:
            self.window = AppWindow(application=self, title="Look-alike Stock Item")
        self.window.show_all()
        self.window.present()

if __name__ == "__main__":
    app = Application()
    app.run(sys.argv)