Add canUpdateFirmware property to printer output devices

cura/PrinterOutput/GenericOutputController.py

@@ -29,6 +29,8 @@ class GenericOutputController(PrinterOutputController):
         self._output_device.printersChanged.connect(self._onPrintersChanged)
         self._active_printer = None
 
+        self.can_update_firmware = True
+
     def _onPrintersChanged(self):
         if self._active_printer:
             self._active_printer.stateChanged.disconnect(self._onPrinterStateChanged)

cura/PrinterOutput/PrinterOutputController.py

@@ -18,6 +18,7 @@ class PrinterOutputController:
         self.can_pre_heat_hotends = True
         self.can_send_raw_gcode = True
         self.can_control_manually = True
+        self.can_update_firmware = False
         self._output_device = output_device
 
     def setTargetHotendTemperature(self, printer: "PrinterOutputModel", extruder: "ExtruderOutputModel", temperature: int):

cura/PrinterOutput/PrinterOutputModel.py

@@ -277,6 +277,13 @@ class PrinterOutputModel(QObject):
             return self._controller.can_control_manually
         return False
 
+    # Does the printer support upgrading firmware
+    @pyqtProperty(bool, notify = canUpdateFirmwareChanged)
+    def canUpdateFirmware(self):
+        if self._controller:
+            return self._controller.can_update_firmware
+        return False
+
     # Returns the configuration (material, variant and buildplate) of the current printer
     @pyqtProperty(QObject, notify = configurationChanged)
     def printerConfiguration(self):

plugins/USBPrinting/AvrFirmwareUpdater.py

@@ -9,7 +9,6 @@ from .avr_isp import stk500v2, intelHex
 
 from enum import IntEnum
 
-@signalemitter
 class AvrFirmwareUpdater(QObject):
     firmwareProgressChanged = pyqtSignal()
     firmwareUpdateStateChanged = pyqtSignal()

plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml

@@ -16,6 +16,7 @@ Cura.MachineAction
     anchors.fill: parent;
     property bool printerConnected: Cura.MachineManager.printerConnected
     property var activeOutputDevice: printerConnected ? Cura.MachineManager.printerOutputDevices[0] : null
+    property var canUpdateFirmware: activeOutputDevice ? activeOutputDevice.canUpdateFirmware : False
 
     Item
     {