Cura/cura/PrinterOutput/ExtruderConfigurationModel.py

# Copyright (c) 2018 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.

from PyQt5.QtCore import pyqtProperty, QObject, pyqtSignal


class ExtruderConfigurationModel(QObject):

    extruderConfigurationChanged = pyqtSignal()

    def __init__(self):
        super().__init__()
        self._position = -1
        self._material = None
        self._hotend_id = None

    def setPosition(self, position):
        self._position = position

    @pyqtProperty(int, fset = setPosition, notify = extruderConfigurationChanged)
    def position(self):
        return self._position

    def setMaterial(self, material):
        self._material = material

    @pyqtProperty(QObject, fset = setMaterial, notify = extruderConfigurationChanged)
    def material(self):
        return self._material

    def setHotendID(self, hotend_id):
        self._hotend_id = hotend_id

    @pyqtProperty(str, fset = setHotendID, notify = extruderConfigurationChanged)
    def hotendID(self):
        return self._hotend_id

    ##  This method is intended to indicate whether the configuration is valid or not.
    #   The method checks if the mandatory fields are or not set
    #   At this moment is always valid since we allow to have empty material and variants.
    def isValid(self):
        return True

    def __str__(self):
        message_chunks = []
        message_chunks.append("Position: " + str(self._position))
        message_chunks.append("-")
        message_chunks.append("Material: " + self.material.type if self.material else "empty")
        message_chunks.append("-")
        message_chunks.append("HotendID: " + self.hotendID if self.hotendID else "empty")
        return " ".join(message_chunks)

    def __eq__(self, other):
        return hash(self) == hash(other)

    #   Calculating a hash function using the position of the extruder, the material GUID and the hotend id to check if is
    #   unique within a set
    def __hash__(self):
        return hash(self._position) ^ (hash(self._material.guid) if self._material is not None else hash(0)) ^ hash(self._hotend_id)