#!/usr/local/cpython-3.6/bin/python3

# Example hello world program from https://developer.gnome.org/gnome-devel-demos/stable/hello-world.py.html.en
# Modified by cecashon to use CSS to get around a theme problem?

import gi
gi.require_version('Gtk', '3.0')

from gi.repository import Gtk, Gdk
import sys


class MyWindow(Gtk.ApplicationWindow):
    # constructor for a Gtk.ApplicationWindow

    def __init__(self, app):
        Gtk.Window.__init__(self, title="Welcome to GNOME", application=app)
        self.set_default_size(200, 100)

        # create a label
        label = Gtk.Label()
        # set the text of the label
        label.set_text("Hello GNOME!")
        # add the label to the window
        self.add(label)

        style_provider = Gtk.CssProvider()
        major_version = Gtk.get_major_version()
        minor_version = Gtk.get_minor_version()
        version_tuple = (major_version, minor_version)
        # DRS: I changed these to byte strings for CPython 3.x.  It was probably tested on 2.x previously.
        # DRS: I also added the major version test.
        if version_tuple > (3, 20):
            css = b"label{color: rgba(255,0,255,1.0);}"
        else:
            css = b"GtkLabel{color: rgba(255,0,255,1.0);}"
        style_provider.load_from_data(css)
        Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(), style_provider,Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)

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)