feat: emit the full bec message to slots

* some widgets will require metadata for their operation

bec_widgets/cli.py

@@ -11,9 +11,9 @@ from .scan_plot import BECScanPlot
 
 
 class BEC_UI(QMainWindow):
-    new_scan_data = pyqtSignal(dict)
+    new_scan_data = pyqtSignal("PyQt_PyObject")
     new_dap_data = pyqtSignal(dict)  # signal per proc instance?
-    new_scan = pyqtSignal()
+    new_scan = pyqtSignal("PyQt_PyObject")
 
     def __init__(self, uipath):
         super().__init__()
@@ -47,13 +47,13 @@ class BEC_UI(QMainWindow):
         scan_lock = RLock()
 
         def _scan_cb(msg):
-            msg = BECMessage.ScanMessage.loads(msg.value)
+            msg = BECMessage.ScanMessage.loads(msg.value)[0]
             with scan_lock:
-                scan_id = msg[0].content["scanID"]
+                scan_id = msg.content["scanID"]
                 if self._scan_id != scan_id:
                     self._scan_id = scan_id
-                    self.new_scan.emit()
-            self.new_scan_data.emit(msg[0].content["data"])
+                    self.new_scan.emit(msg)
+            self.new_scan_data.emit(msg)
 
         bec_connector = RedisConnector("localhost:6379")
 

bec_widgets/scan_plot.py

@@ -41,16 +41,18 @@ class BECScanPlot(pg.PlotWidget):
         if len(self.scan_curves) == 1:
             plot_item.setLabel("left", next(iter(self.scan_curves)))
 
-    @pyqtSlot()
-    def clearData(self):
+    @pyqtSlot("PyQt_PyObject")
+    def clearData(self, _msg):
         for plot_curve in {**self.scan_curves, **self.dap_curves}.values():
             plot_curve.setData(x=[], y=[])
 
-    @pyqtSlot(dict)
-    def redraw_scan(self, data):
+    @pyqtSlot("PyQt_PyObject")
+    def redraw_scan(self, msg):
         if not self.x_channel:
             return
 
+        data = msg.content["data"]
+
         if self.x_channel not in data:
             logger.warning(f"Unknown channel `{self.x_channel}` for X data in {self.objectName()}")
             return