Some final tweaks

Contributes to CURA-5595

cura/API/Backups.py

@@ -13,6 +13,7 @@ from cura.Backups.BackupsManager import BackupsManager
 #       api = CuraAPI()
 #       api.backups.createBackup()
 #       api.backups.restoreBackup(my_zip_file, {"cura_release": "3.1"})``
+
 class Backups:
     manager = BackupsManager()  # Re-used instance of the backups manager.
 

cura/API/Interface/Settings.py

@@ -3,32 +3,31 @@
 
 from cura.CuraApplication import CuraApplication
 
-##  The sidebar context menu API provides a version-proof bridge between Cura's
-#   Sidebar Context Menu and plug-ins that hook into it.
+##  The Interface.Settings API provides a version-proof bridge between Cura's
+#   (currently) sidebar UI and plug-ins that hook into it.
 #
 #   Usage:
 #       ``from cura.API import CuraAPI
 #       api = CuraAPI()
-#       api.sidebar.getContextMenuItems()
-#       menu_actions = []
-#       menu_actions.append("sidebarMenuItemOnClickHandler")
+#       api.interface.settings.getContextMenuItems()
 #       data = {
 #           "name": "My Plugin Action",
 #           "iconName": "my-plugin-icon",
-#           "actions": menu_actions,
+#           "actions": my_menu_actions,
 #           "menu_item": MyPluginAction(self)
 #       }
-#       api.sidebar.addContextMenuItem(data)``
-class Sidebar:
+#       api.interface.settings.addContextMenuItem(data)``
 
-    _application = CuraApplication.getInstance()  # type: CuraApplication
+class Settings:
+    # Re-used instance of Cura:
+    application = CuraApplication.getInstance()  # type: CuraApplication
 
     ##  Add items to the sidebar context menu.
     #   \param menu_item dict containing the menu item to add.
     def addContextMenuItem(self, menu_item: dict) -> None:
-        self._application.addSidebarCustomMenuItem(menu_item)
+        self.application.addSidebarCustomMenuItem(menu_item)
 
     ##  Get all custom items currently added to the sidebar context menu.
     #   \return List containing all custom context menu items.
     def getContextMenuItems(self) -> list:
-        return self._application.getSidebarCustomMenuItems()
+        return self.application.getSidebarCustomMenuItems()

cura/API/Interface/__init__.py

@@ -0,0 +1,24 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.PluginRegistry import PluginRegistry
+from cura.API.Interface.Settings import Settings
+
+##  The Interface class serves as a common root for the specific API
+#   methods for each interface element.
+#
+#   Usage:
+#       ``from cura.API import CuraAPI
+#       api = CuraAPI()
+#       api.interface.settings.addContextMenuItem()
+#       api.interface.viewport.addOverlay() # Not implemented, just a hypothetical
+#       api.interface.toolbar.getToolButtonCount() # Not implemented, just a hypothetical
+#       # etc.``
+
+class Interface:
+
+    # For now we use the same API version to be consistent.
+    VERSION = PluginRegistry.APIVersion
+
+    # API methods specific to the settings portion of the UI
+    settings = Settings()

cura/API/__init__.py

@@ -2,7 +2,7 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 from UM.PluginRegistry import PluginRegistry
 from cura.API.Backups import Backups
-from cura.API.Sidebar import Sidebar
+from cura.API.Interface import Interface
 
 ##  The official Cura API that plug-ins can use to interact with Cura.
 #
@@ -10,13 +10,14 @@ from cura.API.Sidebar import Sidebar
 #   this API provides a version-safe interface with proper deprecation warnings
 #   etc. Usage of any other methods than the ones provided in this API can cause
 #   plug-ins to be unstable.
+
 class CuraAPI:
 
     # For now we use the same API version to be consistent.
     VERSION = PluginRegistry.APIVersion
 
-    # Backups API.
+    # Backups API
     backups = Backups()
 
-    # Sidebar Context Menu API
-    sidebar = Sidebar()
+    # Interface API
+    interface = Interface()