Refactored db setup; extended layout to add header widget zone

src/core/containers/header_container.py

@@ -0,0 +1,46 @@
+# Python imports
+
+# Lib imports
+import gi
+gi.require_version('Gtk', '3.0')
+from gi.repository import Gtk
+
+# Application imports
+from ..widgets.transparency_scale import TransparencyScale
+
+
+
+class HeaderContainer(Gtk.Box):
+    def __init__(self):
+        super(HeaderContainer, self).__init__()
+
+        self.ctx = self.get_style_context()
+
+        self._setup_styling()
+        self._setup_signals()
+        self._subscribe_to_events()
+        self._load_widgets()
+
+        self.show_all()
+
+
+    def _setup_styling(self):
+        self.set_orientation(Gtk.Orientation.HORIZONTAL)
+        self.ctx.add_class("header-container")
+
+    def _setup_signals(self):
+        ...
+
+    def _subscribe_to_events(self):
+        ...
+
+
+    def _load_widgets(self):
+        button    = Gtk.Button(label = "Interactive Debug")
+        button.connect("clicked", self._interactive_debug)
+
+        self.add(TransparencyScale())
+        self.add(button)
+
+    def _interactive_debug(self, widget = None, eve = None):
+        event_system.emit("load_interactive_debug")