Cura/cura/Machines/Models/FavoriteMaterialsModel.py

# Copyright (c) 2019 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.

from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
import cura.CuraApplication  # To listen to changes to the preferences.

##  Model that shows the list of favorite materials.
class FavoriteMaterialsModel(BaseMaterialsModel):
    def __init__(self, parent = None):
        super().__init__(parent)
        cura.CuraApplication.CuraApplication.getInstance().getPreferences().preferenceChanged.connect(self._onFavoritesChanged)
        self._update()

    ##  Triggered when any preference changes, but only handles it when the list
    #   of favourites is changed.
    def _onFavoritesChanged(self, preference_key: str) -> None:
        if preference_key != "cura/favorite_materials":
            return
        self._update()

    def _update(self):
        if not self._canUpdate():
            return

        # Get updated list of favorites
        self._favorite_ids = self._material_manager.getFavorites()

        item_list = []

        for root_material_id, container_node in self._available_materials.items():
            # Do not include the materials from a to-be-removed package
            if bool(container_node.container.getMetaDataEntry("removed", False)):
                continue

            # Only add results for favorite materials
            if root_material_id not in self._favorite_ids:
                continue

            item = self._createMaterialItem(root_material_id, container_node)
            if item:
                item_list.append(item)

        # Sort the item list alphabetically by name
        item_list = sorted(item_list, key = lambda d: d["brand"].upper())

        self.setItems(item_list)