Add function typing for PrinterOutputDevice

This causes a lot of typing errors to surface. We'll fix this later though, when we get to it.

Contributes to issue CURA-5330.

cura/PrinterOutputDevice.py

@@ -1,17 +1,20 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
+
 from UM.Decorators import deprecated
 from UM.i18n import i18nCatalog
 from UM.OutputDevice.OutputDevice import OutputDevice
-from PyQt5.QtCore import pyqtProperty, QObject, QTimer, pyqtSignal, QVariant
+from PyQt5.QtCore import pyqtProperty, QObject, QTimer, pyqtSignal
 from PyQt5.QtWidgets import QMessageBox
 
 from UM.Logger import Logger
+from UM.FileHandler.FileHandler import FileHandler #For typing.
+from UM.Scene.SceneNode import SceneNode #For typing.
 from UM.Signal import signalemitter
 from UM.Application import Application
 
 from enum import IntEnum  # For the connection state tracking.
-from typing import List, Optional
+from typing import Callable, List, Optional
 
 MYPY = False
 if MYPY:
@@ -20,6 +23,16 @@ if MYPY:
 
 i18n_catalog = i18nCatalog("cura")
 
+
+##  The current processing state of the backend.
+class ConnectionState(IntEnum):
+    closed = 0
+    connecting = 1
+    connected = 2
+    busy = 3
+    error = 4
+
+
 ##  Printer output device adds extra interface options on top of output device.
 #
 #   The assumption is made the printer is a FDM printer.
@@ -47,38 +60,37 @@ class PrinterOutputDevice(QObject, OutputDevice):
     # Signal to indicate that the configuration of one of the printers has changed.
     uniqueConfigurationsChanged = pyqtSignal()
 
-    def __init__(self, device_id, parent = None):
+    def __init__(self, device_id: str, parent: QObject = None) -> None:
         super().__init__(device_id = device_id, parent = parent)
 
         self._printers = []  # type: List[PrinterOutputModel]
         self._unique_configurations = []   # type: List[ConfigurationModel]
 
-        self._monitor_view_qml_path = ""
-        self._monitor_component = None
-        self._monitor_item = None
+        self._monitor_view_qml_path = "" #type: str
+        self._monitor_component = None #type: Optional[QObject]
+        self._monitor_item = None #type: Optional[QObject]
 
-        self._control_view_qml_path = ""
-        self._control_component = None
-        self._control_item = None
+        self._control_view_qml_path = "" #type: str
+        self._control_component = None #type: Optional[QObject]
+        self._control_item = None #type: Optional[QObject]
 
-        self._qml_context = None
-        self._accepts_commands = False
+        self._accepts_commands = False #type: bool
 
-        self._update_timer = QTimer()
+        self._update_timer = QTimer() #type: QTimer
         self._update_timer.setInterval(2000)  # TODO; Add preference for update interval
         self._update_timer.setSingleShot(False)
         self._update_timer.timeout.connect(self._update)
 
-        self._connection_state = ConnectionState.closed
+        self._connection_state = ConnectionState.closed #type: ConnectionState
 
-        self._firmware_name = None
-        self._address = ""
-        self._connection_text = ""
+        self._firmware_name = None #type: Optional[str]
+        self._address = "" #type: str
+        self._connection_text = "" #type: str
         self.printersChanged.connect(self._onPrintersChanged)
         Application.getInstance().getOutputDeviceManager().outputDevicesChanged.connect(self._updateUniqueConfigurations)
 
     @pyqtProperty(str, notify = connectionTextChanged)
-    def address(self):
+    def address(self) -> str:
         return self._address
 
     def setConnectionText(self, connection_text):
@@ -87,36 +99,36 @@ class PrinterOutputDevice(QObject, OutputDevice):
             self.connectionTextChanged.emit()
 
     @pyqtProperty(str, constant=True)
-    def connectionText(self):
+    def connectionText(self) -> str:
         return self._connection_text
 
-    def materialHotendChangedMessage(self, callback):
+    def materialHotendChangedMessage(self, callback: Callable[[int], None]) -> None:
         Logger.log("w", "materialHotendChangedMessage needs to be implemented, returning 'Yes'")
         callback(QMessageBox.Yes)
 
-    def isConnected(self):
+    def isConnected(self) -> bool:
         return self._connection_state != ConnectionState.closed and self._connection_state != ConnectionState.error
 
-    def setConnectionState(self, connection_state):
+    def setConnectionState(self, connection_state: ConnectionState) -> None:
         if self._connection_state != connection_state:
             self._connection_state = connection_state
             self.connectionStateChanged.emit(self._id)
 
     @pyqtProperty(str, notify = connectionStateChanged)
-    def connectionState(self):
+    def connectionState(self) -> ConnectionState:
         return self._connection_state
 
-    def _update(self):
+    def _update(self) -> None:
         pass
 
-    def _getPrinterByKey(self, key) -> Optional["PrinterOutputModel"]:
+    def _getPrinterByKey(self, key: str) -> Optional["PrinterOutputModel"]:
         for printer in self._printers:
             if printer.key == key:
                 return printer
 
         return None
 
-    def requestWrite(self, nodes, file_name = None, filter_by_machine = False, file_handler = None, **kwargs):
+    def requestWrite(self, nodes: List[SceneNode], file_name: Optional[str] = None, limit_mimetypes: bool = False, file_handler: Optional[FileHandler] = None, **kwargs: str) -> None:
         raise NotImplementedError("requestWrite needs to be implemented")
 
     @pyqtProperty(QObject, notify = printersChanged)
@@ -126,11 +138,11 @@ class PrinterOutputDevice(QObject, OutputDevice):
         return None
 
     @pyqtProperty("QVariantList", notify = printersChanged)
-    def printers(self):
+    def printers(self) -> List["PrinterOutputModel"]:
         return self._printers
 
-    @pyqtProperty(QObject, constant=True)
-    def monitorItem(self):
+    @pyqtProperty(QObject, constant = True)
+    def monitorItem(self) -> QObject:
         # Note that we specifically only check if the monitor component is created.
         # It could be that it failed to actually create the qml item! If we check if the item was created, it will try to
         # create the item (and fail) every time.
@@ -138,19 +150,19 @@ class PrinterOutputDevice(QObject, OutputDevice):
             self._createMonitorViewFromQML()
         return self._monitor_item
 
-    @pyqtProperty(QObject, constant=True)
-    def controlItem(self):
+    @pyqtProperty(QObject, constant = True)
+    def controlItem(self) -> QObject:
         if not self._control_component:
             self._createControlViewFromQML()
         return self._control_item
 
-    def _createControlViewFromQML(self):
+    def _createControlViewFromQML(self) -> None:
         if not self._control_view_qml_path:
             return
         if self._control_item is None:
             self._control_item = Application.getInstance().createQmlComponent(self._control_view_qml_path, {"OutputDevice": self})
 
-    def _createMonitorViewFromQML(self):
+    def _createMonitorViewFromQML(self) -> None:
         if not self._monitor_view_qml_path:
             return
 
@@ -158,29 +170,29 @@ class PrinterOutputDevice(QObject, OutputDevice):
             self._monitor_item = Application.getInstance().createQmlComponent(self._monitor_view_qml_path, {"OutputDevice": self})
 
     ##  Attempt to establish connection
-    def connect(self):
+    def connect(self) -> None:
         self.setConnectionState(ConnectionState.connecting)
         self._update_timer.start()
 
     ##  Attempt to close the connection
-    def close(self):
+    def close(self) -> None:
         self._update_timer.stop()
         self.setConnectionState(ConnectionState.closed)
 
     ##  Ensure that close gets called when object is destroyed
-    def __del__(self):
+    def __del__(self) -> None:
         self.close()
 
-    @pyqtProperty(bool, notify=acceptsCommandsChanged)
-    def acceptsCommands(self):
+    @pyqtProperty(bool, notify = acceptsCommandsChanged)
+    def acceptsCommands(self) -> bool:
         return self._accepts_commands
 
     @deprecated("Please use the protected function instead", "3.2")
-    def setAcceptsCommands(self, accepts_commands):
+    def setAcceptsCommands(self, accepts_commands: bool) -> None:
         self._setAcceptsCommands(accepts_commands)
 
     ##  Set a flag to signal the UI that the printer is not (yet) ready to receive commands
-    def _setAcceptsCommands(self, accepts_commands):
+    def _setAcceptsCommands(self, accepts_commands: bool) -> None:
         if self._accepts_commands != accepts_commands:
             self._accepts_commands = accepts_commands
 
@@ -188,15 +200,15 @@ class PrinterOutputDevice(QObject, OutputDevice):
 
     # Returns the unique configurations of the printers within this output device
     @pyqtProperty("QVariantList", notify = uniqueConfigurationsChanged)
-    def uniqueConfigurations(self):
+    def uniqueConfigurations(self) -> List[ConfigurationModel]:
         return self._unique_configurations
 
-    def _updateUniqueConfigurations(self):
+    def _updateUniqueConfigurations(self) -> None:
         self._unique_configurations = list(set([printer.printerConfiguration for printer in self._printers if printer.printerConfiguration is not None]))
         self._unique_configurations.sort(key = lambda k: k.printerType)
         self.uniqueConfigurationsChanged.emit()
 
-    def _onPrintersChanged(self):
+    def _onPrintersChanged(self) -> None:
         for printer in self._printers:
             printer.configurationChanged.connect(self._updateUniqueConfigurations)
 
@@ -205,21 +217,12 @@ class PrinterOutputDevice(QObject, OutputDevice):
 
     ##  Set the device firmware name
     #
-    #   \param name \type{str} The name of the firmware.
-    def _setFirmwareName(self, name):
+    #   \param name The name of the firmware.
+    def _setFirmwareName(self, name: str) -> None:
         self._firmware_name = name
 
     ##  Get the name of device firmware
     #
     #   This name can be used to define device type
-    def getFirmwareName(self):
-        return self._firmware_name
-
-
-##  The current processing state of the backend.
-class ConnectionState(IntEnum):
-    closed = 0
-    connecting = 1
-    connected = 2
-    busy = 3
-    error = 4
+    def getFirmwareName(self) -> str:
+        return self._firmware_name