def __init__(self, view, known_devices=Devices.all):
"""
:param view: called with update((port,device)) when a device is connected and update(None) when disconnected
"""
self.view = view
self.connected = None
self.scan = USBScanner(known_devices)
self.mgr = SetManager()
self.mgr.events += lambda item, added: self.device_changed(item, added)
class ConnectedDeviceModel:
"""
Keeps track of the first device connected, until it becomes disconnected.
The client is responsible for calling update() regularly. The connected attribute is (port, USBDevice) or None when
no connected device.
"""
def __init__(self, view, known_devices=Devices.all):
"""
:param view: called with update((port,device)) when a device is connected and update(None) when disconnected
"""
self.view = view
self.connected = None
self.scan = USBScanner(known_devices)
self.mgr = SetManager()
self.mgr.events += lambda item, added: self.device_changed(item, added)
def device_changed(self, item, added):
if added != self.connected: # when added, we don't have a connection, and when removed we do
self.connected = (item if added else None)
self.view.update(self.connected)
def update(self):
current = self.scan.scan()
self.mgr.update(current)
