Refactored to reduce Glade dependency...

src/plugins/plugin_base.py

@@ -0,0 +1,60 @@
+# Python imports
+import os, time
+
+# Lib imports
+
+# Application imports
+
+
+class PluginBaseException(Exception):
+    ...
+
+
+class PluginBase:
+    def __init__(self):
+        self.name               = "Example Plugin"  # NOTE: Need to remove after establishing private bidirectional 1-1 message bus
+                                                    #       where self.name should not be needed for message comms
+
+        self._builder           = None
+        self._ui_objects        = None
+        self._event_system      = None
+
+
+    def run(self):
+        """
+            Must define regardless if needed and can 'pass' if plugin doesn't need it.
+            Is intended to be used to setup internal signals or custom Gtk Builders/UI logic.
+        """
+        raise PluginBaseException("Method hasn't been overriden...")
+
+    def generate_reference_ui_element(self):
+        """
+            Requests Key:  'ui_target': "plugin_control_list",
+            Must define regardless if needed and can 'pass' if plugin doesn't use it.
+            Must return a widget if "ui_target" is set.
+        """
+        raise PluginBaseException("Method hasn't been overriden...")
+
+    def set_event_system(self, event_system):
+        """
+            Requests Key:  'pass_events': "true"
+            Must define in plugin if "pass_events" is set to "true" string.
+        """
+        self._event_system = event_system
+
+    def set_ui_object_collection(self, ui_objects):
+        """
+            Requests Key:  "pass_ui_objects": [""]
+            Request reference to a UI component. Will be passed back as array to plugin.
+            Must define in plugin if set and an array of valid glade UI IDs is given.
+        """
+        self._ui_objects = ui_objects
+
+    def subscribe_to_events(self):
+        ...
+
+
+    def clear_children(self, widget: type) -> None:
+        """ Clear children of a gtk widget. """
+        for child in widget.get_children():
+            widget.remove(child)