Refactored to reduce Glade dependency...

src/core/window.py

@@ -0,0 +1,76 @@
+# Python imports
+import time
+import signal
+
+# Lib imports
+import gi
+import cairo
+
+gi.require_version('Gtk', '3.0')
+gi.require_version('Gdk', '3.0')
+
+from gi.repository import Gtk
+from gi.repository import Gdk
+from gi.repository import GLib
+
+# Application imports
+from core.controller import Controller
+
+
+
+
+class Window(Gtk.ApplicationWindow):
+    """docstring for Window."""
+
+    def __init__(self, args, unknownargs):
+        super(Window, self).__init__()
+
+        self._set_window_data()
+        self._setup_styling()
+        self._setup_signals()
+        self._load_widgets(args, unknownargs)
+
+        self.show_all()
+
+
+    def _setup_styling(self):
+        self.set_default_size(1670, 830)
+        self.set_title(f"{app_name}")
+        self.set_icon_from_file( settings.get_window_icon() )
+        self.set_gravity(5)  # 5 = CENTER
+        self.set_position(1) # 1 = CENTER, 4 = CENTER_ALWAYS
+
+    def _setup_signals(self):
+        self.connect("delete-event", self._tear_down)
+        GLib.unix_signal_add(GLib.PRIORITY_DEFAULT, signal.SIGINT, self._tear_down)
+
+    def _load_widgets(self, args, unknownargs):
+        controller = Controller(args, unknownargs)
+        self.add( controller.get_core_widget() )
+
+    def _set_window_data(self) -> None:
+        screen = self.get_screen()
+        visual = screen.get_rgba_visual()
+
+        if visual != None and screen.is_composited():
+            self.set_visual(visual)
+            self.set_app_paintable(True)
+            self.connect("draw", self._area_draw)
+
+        # bind css file
+        cssProvider  = Gtk.CssProvider()
+        cssProvider.load_from_path( settings.get_css_file() )
+        screen       = Gdk.Screen.get_default()
+        styleContext = Gtk.StyleContext()
+        styleContext.add_provider_for_screen(screen, cssProvider, Gtk.STYLE_PROVIDER_PRIORITY_USER)
+
+    def _area_draw(self, widget: Gtk.ApplicationWindow, cr: cairo.Context) -> None:
+        cr.set_source_rgba(0, 0, 0, 0.54)
+        cr.set_operator(cairo.OPERATOR_SOURCE)
+        cr.paint()
+        cr.set_operator(cairo.OPERATOR_OVER)
+
+
+    def _tear_down(self, widget=None, eve=None):
+        time.sleep(event_sleep_time)
+        Gtk.main_quit()