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8a8de95969
This iteration iterates over the extruders. Contributes to issues CURA-1278 and CURA-351.
76 lines
3.9 KiB
Python
76 lines
3.9 KiB
Python
# Copyright (c) 2016 Ultimaker B.V.
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# Cura is released under the terms of the AGPLv3 or higher.
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from cura.Extruder import Extruder #The individual extruders managed by this manager.
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import UM.Application #To get the global container stack to find the current machine.
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import UM.Logger
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import UM.Settings.ContainerRegistry #Finding containers by ID.
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import UM.Signal #To notify other components of changes in the extruders.
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## Class that handles the current extruder stack.
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#
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# This finds the extruders that are available for the currently active machine
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# and makes sure that whenever the machine is swapped, this list is kept up to
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# date. It also contains and updates the setting stacks for the extruders.
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class ExtruderManager:
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## The singleton instance of this manager.
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__instance = None
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## Signal to notify other components when the list of extruders changes.
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extrudersChanged = UM.Signal()
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## Registers listeners and such to listen to changes to the extruders.
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def __init__(self):
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self._extruders = [] #Extruders for the current machine.
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self._global_container_stack = None
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self._next_item = 0 #For when you use this class as iterator.
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UM.Application.getInstance().globalContainerStackChanged.connect(self._reconnectExtruderReload) #When the current machine changes, we need to reload all extruders belonging to the new machine.
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## Gets an instance of this extruder manager.
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#
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# If an instance was already created, the old instance is returned. This
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# implements the singleton pattern.
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@classmethod
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def getInstance(cls):
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if not cls.__instance:
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cls.__instance = ExtruderManager()
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return cls.__instance
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## Creates an iterator over the extruders in this manager.
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#
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# \return An iterator over the extruders in this manager.
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def __iter__(self):
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return iter(self._extruders)
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## When the global container stack changes, this reconnects to the new
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# signal for containers changing.
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def _reconnectExtruderReload(self):
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if self._global_container_stack:
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self._global_container_stack.containersChanged.disconnect(self._reloadExtruders) #Disconnect from the old global container stack.
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self._global_container_stack = UM.Application.getInstance().getGlobalContainerStack()
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self._global_container_stack.containersChanged.connect(self._reloadExtruders) #When the current machine changes, we need to reload all extruders belonging to the new machine.
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## (Re)loads all extruders of the currently active machine.
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#
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# This looks at the global container stack to see which machine is active.
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# Then it loads the extruders for that machine and loads each of them in a
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# list of extruders.
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def _reloadExtruders(self):
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self._extruders = []
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if not self._global_container_stack: #No machine has been added yet.
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self.extrudersChanged.emit() #Yes, we just cleared the _extruders list!
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return #Then leave them empty!
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#Get the extruder definitions belonging to the current machine.
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machine = self._global_container_stack.getBottom()
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extruder_train_ids = machine.getMetaData("machine_extruder_trains")
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for extruder_train_id in extruder_train_ids:
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extruder_definitions = UM.Settings.ContainerRegistry.getInstance().findDefinitionContainers(id = extruder_train_id) #Should be only 1 definition if IDs are unique, but add the whole list anyway.
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if not extruder_definitions: #Empty list or error.
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UM.Logger.log("w", "Machine definition %s refers to an extruder train \"%s\", but no such extruder was found.", machine.getId(), extruder_train_id)
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continue
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for extruder_definition in extruder_definitions:
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self._extruders.append(Extruder(extruder_definition))
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self.extrudersChanged.emit() |