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Don't update model if extruders haven't all been loaded yet

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This model is created while the extruder stacks have not yet been filled in. You can't connect yet. When the extruder is ready, _extrudersChanged will be called again and then the new extruder will also get connected.

Contributes to issue CURA-4243.
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Ruben D 2017-11-30 00:33:10 +01:00
parent c1ba64fd9e
commit f9c59c7e1e
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cura/Settings/ExtrudersModel.py
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@ -142,6 +142,8 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
self._active_machine_extruders = []
extruder_manager = ExtruderManager.getInstance()
for extruder in extruder_manager.getExtruderStacks():
if extruder is None: #This extruder wasn't loaded yet. This happens asynchronously while this model is constructed from QML.
continue
extruder.containersChanged.connect(self._onExtruderStackContainersChanged)
self._active_machine_extruders.append(extruder)