Thomas K Ales [MSE]
56 lines
2.2 KiB
Python
Executable File
56 lines
2.2 KiB
Python
Executable File
"""Qt adapter over the (Qt-free) T3RDriver.
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The driver fires its callbacks on the reader thread. This adapter turns
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each one into a Qt signal emitted from that thread; because the adapter
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lives on the GUI thread, Qt queues the delivery and slots run on the GUI
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thread — which is what widget code requires.
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Command methods are forwarded to the driver, so panels can hold the adapter
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alone and use it exactly like the old QObject driver.
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"""
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from __future__ import annotations
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from PyQt6.QtCore import QObject, pyqtSignal
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from hardware.t3r_driver import T3RDriver
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class QtT3RAdapter(QObject):
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port_opened = pyqtSignal()
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handshake_ok = pyqtSignal(int, int, int) # proto_ver, fw_ver, num_channels
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disconnected = pyqtSignal(str) # reason ("" = user-initiated)
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info_updated = pyqtSignal(int, object) # ch, proto.Info
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drv_status_updated = pyqtSignal(int, object)
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position_updated = pyqtSignal(int, int)
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motion_done = pyqtSignal(int, int)
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stopped = pyqtSignal(int, int)
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fault_occurred = pyqtSignal(int, int)
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ack_received = pyqtSignal(int, int)
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frame_received = pyqtSignal(int, bytes)
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_EVENTS = ("port_opened", "handshake_ok", "disconnected", "info_updated",
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"drv_status_updated", "position_updated", "motion_done",
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"stopped", "fault_occurred", "ack_received", "frame_received")
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def __init__(self, driver: T3RDriver | None = None, parent=None):
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super().__init__(parent)
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self.driver = driver if driver is not None else T3RDriver()
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for name in self._EVENTS:
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getattr(self.driver, name).connect(getattr(self, name).emit)
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# Class attributes (constants) the panels read off the driver
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CHANNEL_NAMES = T3RDriver.CHANNEL_NAMES
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GR_AXIS_CH = T3RDriver.GR_AXIS_CH
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@property
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def is_open(self) -> bool:
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return self.driver.is_open
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def __getattr__(self, name):
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# Only reached for attributes this QObject doesn't define, i.e. the
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# driver's command API (open/close/move/jog/enable/...).
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if name.startswith("_"):
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raise AttributeError(name)
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return getattr(object.__getattribute__(self, "driver"), name)
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