Introduced distinction between hiding and disabling gui.

Running app with gui enabled will still allow for toggling gui visibility
Running app with gui disabled (--nogui) will not allow toggling gui visibility

pyrousel/app.py

@@ -30,9 +30,8 @@ def Run(settings: ApplicationSettings = ApplicationSettings()) -> None:
     print(f'--Startup model: {settings.startup_model}')
     print('\n')
 
-    app_window = AppWindow(settings.window_width, settings.window_height)
+    app_window = AppWindow(settings.window_width, settings.window_height, settings.enable_gui)
     app_window.Init()
-    app_window.draw_gui = settings.enable_gui
 
     if settings.startup_model is not None:
         app_window.OnModelRequested(settings.startup_model)

pyrousel/appwindow.py

@@ -12,7 +12,7 @@
 from .camera import Camera
 
 class AppWindow(object):
-    def __init__(self, width: int = 1280, height: int = 720):
+    def __init__(self, width: int = 1280, height: int = 720, enable_gui=True):
         self.__width = width
         self.__height = height
         self.__aspec_ratio = self.__width / self.__height
@@ -42,12 +42,15 @@ def __init__(self, width: int = 1280, height: int = 720):
             glfw.swap_interval(0)
 
         # App user interface (IMGui)
-        self.gui = None
-        self.gui = AppGUI(self.__win)
-        self.gui.import_settings.ModelRequestSignal.connect(self.OnModelRequested)
-        self.gui.import_settings.ModelReloadSignal.connect(self.OnModelReloadRequested)
-        self.gui.camera_settings.CameraFocusRequested.connect(self.OnCameraFocusRequested)
-        self.draw_gui = True
+        if enable_gui:
+            self.gui = AppGUI(self.__win)
+            self.gui.import_settings.ModelRequestSignal.connect(self.OnModelRequested)
+            self.gui.import_settings.ModelReloadSignal.connect(self.OnModelReloadRequested)
+            self.gui.camera_settings.CameraFocusRequested.connect(self.OnCameraFocusRequested)
+            self.draw_gui = True
+        else:
+            self.gui = None
+            self.draw_gui = False
 
     def Init(self) -> None:
         """Initialises OpenGL graphics renderer"""