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https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
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73 lines
3.5 KiB
Python
73 lines
3.5 KiB
Python
from UM.OutputDevice.OutputDevicePlugin import OutputDevicePlugin
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from . import NetworkPrinterOutputDevice
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from zeroconf import Zeroconf, ServiceBrowser, ServiceStateChange
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from UM.Signal import Signal, SignalEmitter
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from UM.Application import Application
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## This plugin handles the connection detection & creation of output device objects for the UM3 printer.
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# Zero-Conf is used to detect printers, which are saved in a dict.
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# If we discover a printer that has the same key as the active machine instance a connection is made.
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class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin, SignalEmitter):
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def __init__(self):
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super().__init__()
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self._zero_conf = Zeroconf()
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self._browser = None
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self._printers = {}
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# Because the model needs to be created in the same thread as the QMLEngine, we use a signal.
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self.addPrinterSignal.connect(self.addPrinter)
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Application.getInstance().getMachineManager().activeMachineInstanceChanged.connect(self._onActiveMachineInstanceChanged)
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addPrinterSignal = Signal()
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## Start looking for devices on network.
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def start(self):
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self._browser = ServiceBrowser(self._zero_conf, u'_ultimaker._tcp.local.', [self._onServiceChanged])
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## Stop looking for devices on network.
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def stop(self):
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self._zero_conf.close()
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def _onActiveMachineInstanceChanged(self):
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try:
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active_machine_key = Application.getInstance().getMachineManager().getActiveMachineInstance().getKey()
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except AttributeError:
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## Active machine instance changed to None. This can happen upon clean start. Simply ignore.
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return
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for key in self._printers:
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if key == active_machine_key:
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self._printers[key].connect()
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self._printers[key].connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
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else:
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self._printers[key].close()
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## Because the model needs to be created in the same thread as the QMLEngine, we use a signal.
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def addPrinter(self, name, address, properties):
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printer = NetworkPrinterOutputDevice.NetworkPrinterOutputDevice(name, address, properties)
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self._printers[printer.getKey()] = printer
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if printer.getKey() == Application.getInstance().getMachineManager().getActiveMachineInstance().getKey():
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self._printers[printer.getKey()].connect()
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printer.connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
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## Handler for when the connection state of one of the detected printers changes
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def _onPrinterConnectionStateChanged(self, key):
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if self._printers[key].isConnected():
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self.getOutputDeviceManager().addOutputDevice(self._printers[key])
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else:
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self.getOutputDeviceManager().removeOutputDevice(key)
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## Handler for zeroConf detection
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def _onServiceChanged(self, zeroconf, service_type, name, state_change):
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if state_change == ServiceStateChange.Added:
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info = zeroconf.get_service_info(service_type, name)
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if info:
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if info.properties.get(b"type", None):
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address = '.'.join(map(lambda n: str(n), info.address))
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self.addPrinterSignal.emit(str(name), address, info.properties)
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elif state_change == ServiceStateChange.Removed:
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pass
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# TODO; This isn't testable right now. We need to also decide how to handle
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# |