Machine actions can now be used as a plugin type for Cura

CURA-1385

cura/CuraApplication.py

@@ -44,6 +44,7 @@ from . import ZOffsetDecorator
 from . import CuraSplashScreen
 from . import MachineManagerModel
 from . import ContainerSettingsModel
+from . import MachineActionManager
 
 from PyQt5.QtCore import pyqtSlot, QUrl, pyqtSignal, pyqtProperty, QEvent, Q_ENUMS
 from PyQt5.QtGui import QColor, QIcon
@@ -100,6 +101,8 @@ class CuraApplication(QtApplication):
         SettingDefinition.addSupportedProperty("settable_globally", DefinitionPropertyType.Any, default = True)
         SettingDefinition.addSettingType("extruder", int, str, UM.Settings.Validator)
 
+        self._machine_action_manager = MachineActionManager.MachineActionManager()
+
         super().__init__(name = "cura", version = CuraVersion, buildtype = CuraBuildType)
 
         self.setWindowIcon(QIcon(Resources.getPath(Resources.Images, "cura-icon.png")))

cura/MachineActionManager.py

@@ -2,6 +2,8 @@
 # Cura is released under the terms of the AGPLv3 or higher.
 from UM.Logger import Logger
 
+from UM.PluginRegistry import PluginRegistry  # So MachineAction can be added as plugin type
+
 
 ##  Raised when trying to add an unknown machine action as a required action
 class UnknownMachineAction(Exception):
@@ -27,6 +29,8 @@ class MachineActionManager:
         ##  Dict of all actions that need to be done when first added by machine reference.
         self._first_start_actions = {}
 
+        PluginRegistry.addType("machine_action", self.addMachineAction)
+
     ##  Add a required action to a machine
     #   Raises an exception when the action is not recognised.
     def addRequiredAction(self, machine, action_key):