Allow floating point in bed temperature

This is consistent with the hotend temperature. Only we round it just before outputting it to g-code because the g-code doesn't support it.
This fixes a typing error that my IDE gave me.

cura/PrinterOutput/GenericOutputController.py

@@ -81,8 +81,8 @@ class GenericOutputController(PrinterOutputController):
             self._output_device.cancelPrint()
             pass
 
-    def setTargetBedTemperature(self, printer: "PrinterOutputModel", temperature: int) -> None:
-        self._output_device.sendCommand("M140 S%s" % temperature)
+    def setTargetBedTemperature(self, printer: "PrinterOutputModel", temperature: float) -> None:
+        self._output_device.sendCommand("M140 S%s" % round(temperature)) # The API doesn't allow floating point.
 
     def _onTargetBedTemperatureChanged(self) -> None:
         if self._preheat_bed_timer.isActive() and self._preheat_printer and self._preheat_printer.targetBedTemperature == 0:

cura/PrinterOutput/PrinterOutputController.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2018 Ultimaker B.V.
+# Copyright (c) 2019 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from UM.Logger import Logger
@@ -25,10 +25,10 @@ class PrinterOutputController:
         self.can_update_firmware = False
         self._output_device = output_device
 
-    def setTargetHotendTemperature(self, printer: "PrinterOutputModel", position: int, temperature: Union[int, float]) -> None:
+    def setTargetHotendTemperature(self, printer: "PrinterOutputModel", position: int, temperature: float) -> None:
         Logger.log("w", "Set target hotend temperature not implemented in controller")
 
-    def setTargetBedTemperature(self, printer: "PrinterOutputModel", temperature: int) -> None:
+    def setTargetBedTemperature(self, printer: "PrinterOutputModel", temperature: float) -> None:
         Logger.log("w", "Set target bed temperature not implemented in controller")
 
     def setJobState(self, job: "PrintJobOutputModel", state: str) -> None:

cura/PrinterOutput/PrinterOutputModel.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2018 Ultimaker B.V.
+# Copyright (c) 2019 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, QVariant, pyqtSlot, QUrl
@@ -30,8 +30,8 @@ class PrinterOutputModel(QObject):
 
     def __init__(self, output_controller: "PrinterOutputController", number_of_extruders: int = 1, parent=None, firmware_version = "") -> None:
         super().__init__(parent)
-        self._bed_temperature = -1  # Use -1 for no heated bed.
-        self._target_bed_temperature = 0
+        self._bed_temperature = -1  # type: float  # Use -1 for no heated bed.
+        self._target_bed_temperature = 0 # type: float
         self._name = ""
         self._key = ""  # Unique identifier
         self._controller = output_controller
@@ -188,19 +188,19 @@ class PrinterOutputModel(QObject):
             self.nameChanged.emit()
 
     ##  Update the bed temperature. This only changes it locally.
-    def updateBedTemperature(self, temperature: int) -> None:
+    def updateBedTemperature(self, temperature: float) -> None:
         if self._bed_temperature != temperature:
             self._bed_temperature = temperature
             self.bedTemperatureChanged.emit()
 
-    def updateTargetBedTemperature(self, temperature: int) -> None:
+    def updateTargetBedTemperature(self, temperature: float) -> None:
         if self._target_bed_temperature != temperature:
             self._target_bed_temperature = temperature
             self.targetBedTemperatureChanged.emit()
 
     ##  Set the target bed temperature. This ensures that it's actually sent to the remote.
-    @pyqtSlot(int)
-    def setTargetBedTemperature(self, temperature: int) -> None:
+    @pyqtSlot(float)
+    def setTargetBedTemperature(self, temperature: float) -> None:
         self._controller.setTargetBedTemperature(self, temperature)
         self.updateTargetBedTemperature(temperature)
 
@@ -229,12 +229,12 @@ class PrinterOutputModel(QObject):
     def state(self) -> str:
         return self._printer_state
 
-    @pyqtProperty(int, notify=bedTemperatureChanged)
-    def bedTemperature(self) -> int:
+    @pyqtProperty(float, notify = bedTemperatureChanged)
+    def bedTemperature(self) -> float:
         return self._bed_temperature
 
-    @pyqtProperty(int, notify=targetBedTemperatureChanged)
-    def targetBedTemperature(self) -> int:
+    @pyqtProperty(float, notify = targetBedTemperatureChanged)
+    def targetBedTemperature(self) -> float:
         return self._target_bed_temperature
 
     # Does the printer support pre-heating the bed at all