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fix(waveform): async data duplication if multiple signals from same device fixed

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This commit is contained in:
wyzula_j
2025-05-05 16:26:44 +02:00
parent bc0e277332
commit 15eebd500b
1 changed files with 15 additions and 8 deletions
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11
bec_widgets/widgets/plots/waveform/waveform.py
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@ -137,6 +137,7 @@ class Waveform(PlotBase):
# Curve data
self._sync_curves = []
self._async_curves = []
self._async_connected_devices: set[str] = set()
self._slice_index = None
self._dap_curves = []
self._mode: Literal["none", "sync", "async", "mixed"] = "none"
@ -544,6 +545,7 @@ class Waveform(PlotBase):
continue
config = CurveConfig(**cfg_dict)
self._add_curve(config=config)
self.update_with_scan_history(-1)
except json.JSONDecodeError as e:
logger.error(f"Failed to decode JSON: {e}")
@ -1012,6 +1014,7 @@ class Waveform(PlotBase):
return
if current_scan_id != self.scan_id:
self._async_connected_devices.clear()
self.reset()
self.new_scan.emit()
self.new_scan_id.emit(current_scan_id)
@ -1178,18 +1181,22 @@ class Waveform(PlotBase):
except KeyError:
logger.warning(f"Curve {name} not found in plot item.")
pass
# Connect only once per device signal
if name not in self._async_connected_devices:
self.bec_dispatcher.connect_slot(
self.on_async_readback,
MessageEndpoints.device_async_readback(self.scan_id, name),
from_start=True,
cb_info={"scan_id": self.scan_id},
)
logger.info(f"Setup async curve {name}")
self._async_connected_devices.add(name)
logger.info(f"Async read-back connected for {name}")
@SafeSlot(dict, dict, verify_sender=True)
def on_async_readback(self, msg, metadata):
"""
Get async data readback. This code needs to be fast, therefor we try
Get async data readback. This code needs to be fast; therefore, we try
to reduce the number of copies in between cycles. Be careful when refactoring
this part as it will affect the performance of the async readback.