fix(bec_signal_proxy): timeout for blocking implemented

bec_widgets/utils/bec_signal_proxy.py

@@ -5,28 +5,43 @@ analyse data. Requesting a new fit may lead to request piling up and an overall
 will allow you to decide by yourself when to unblock and execute the callback again."""
 
 from pyqtgraph import SignalProxy
-from qtpy.QtCore import Signal, Slot
+from qtpy.QtCore import QTimer, Signal
+
+from bec_widgets.qt_utils.error_popups import SafeSlot
 
 
 class BECSignalProxy(SignalProxy):
-    """Thin wrapper around the SignalProxy class to allow signal calls to be blocked, but args still being stored
+    """
+    Thin wrapper around the SignalProxy class to allow signal calls to be blocked,
+    but arguments still being stored.
 
     Args:
-        *args: Arguments to pass to the SignalProxy class
-        rateLimit (int): The rateLimit of the proxy
-        **kwargs: Keyword arguments to pass to the SignalProxy class
+        *args: Arguments to pass to the SignalProxy class.
+        rateLimit (int): The rateLimit of the proxy.
+        timeout (float): The number of seconds after which the proxy automatically
+                         unblocks if still blocked. Default is 10.0 seconds.
+        **kwargs: Keyword arguments to pass to the SignalProxy class.
 
     Example:
-    >>> proxy = BECSignalProxy(signal, rate_limit=25, slot=callback)"""
+        >>> proxy = BECSignalProxy(signal, rate_limit=25, slot=callback)
+    """
 
     is_blocked = Signal(bool)
 
-    def __init__(self, *args, rateLimit=25, **kwargs):
+    def __init__(self, *args, rateLimit=25, timeout=10.0, **kwargs):
         super().__init__(*args, rateLimit=rateLimit, **kwargs)
         self._blocking = False
         self.old_args = None
         self.new_args = None
 
+        # Store timeout value (in seconds)
+        self._timeout = timeout
+
+        # Create a single-shot timer for auto-unblocking
+        self._timer = QTimer()
+        self._timer.setSingleShot(True)
+        self._timer.timeout.connect(self._timeout_unblock)
+
     @property
     def blocked(self):
         """Returns if the proxy is blocked"""
@@ -46,9 +61,22 @@ class BECSignalProxy(SignalProxy):
         self.old_args = args
         super().signalReceived(*args)
 
-    @Slot()
+        self._timer.start(int(self._timeout * 1000))
+
+    @SafeSlot()
     def unblock_proxy(self):
         """Unblock the proxy, and call the signalReceived method in case there was an update of the args."""
-        self.blocked = False
-        if self.new_args != self.old_args:
-            self.signalReceived(*self.new_args)
+        if self.blocked:
+            self._timer.stop()
+            self.blocked = False
+            if self.new_args != self.old_args:
+                self.signalReceived(*self.new_args)
+
+    @SafeSlot()
+    def _timeout_unblock(self):
+        """
+        Internal method called by the QTimer upon timeout. Unblocks the proxy
+        automatically if it is still blocked.
+        """
+        if self.blocked:
+            self.unblock_proxy()