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5b8ed91b04
Just like the QualityManagementModel, this class is intended to be used as proxy for the material management page in the preferences. I'm intending to move all relevant pyqtSlots from the material manager into this one. The advantage of this switch is that the material manager had no well-bounded scope and so tended to become a big mess of all sorts of functions. This one has a clear scope: serve as a proxy for the buttons you can press in the preferences screen for materials. Contributes to issue CURA-6600.
33 lines
1.7 KiB
Python
33 lines
1.7 KiB
Python
# Copyright (c) 2019 Ultimaker B.V.
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# Cura is released under the terms of the LGPLv3 or higher.
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from PyQt5.QtCore import QObject, pyqtSlot # To allow the preference page proxy to be used from the actual preferences page.
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from typing import TYPE_CHECKING
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from cura.Settings.CuraContainerRegistry import CuraContainerRegistry # To find the sets of materials belonging to each other, and currently loaded extruder stacks.
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if TYPE_CHECKING:
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from cura.Machines.MaterialNode import MaterialNode
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## Proxy class to the materials page in the preferences.
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#
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# This class handles the actions in that page, such as creating new materials,
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# renaming them, etc.
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class MaterialManagementModel(QObject):
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## Can a certain material be deleted, or is it still in use in one of the
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# container stacks anywhere?
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#
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# We forbid the user from deleting a material if it's in use in any stack.
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# Deleting it while it's in use can lead to corrupted stacks. In the
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# future we might enable this functionality again (deleting the material
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# from those stacks) but for now it is easier to prevent the user from
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# doing this.
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# \return Whether or not the material can be removed.
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@pyqtSlot("QVariant", result = bool)
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def canMaterialBeRemoved(self, material_node: "MaterialNode"):
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container_registry = CuraContainerRegistry.getInstance()
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ids_to_remove = {metadata.get("id", "") for metadata in container_registry.findInstanceContainersMetadata(base_file = material_node.base_file)}
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for extruder_stack in container_registry.findContainerStacks(type = "extruder_train"):
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if extruder_stack.material.getId() in ids_to_remove:
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return False
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return True |