Fixed save/load, sfg creating, simulation, bug fixes

Fixed a lot of bug fixes, also added shortcut for creating signal "Space"

b_asic/GUI/arrow.py

@@ -9,12 +9,10 @@ from b_asic import Signal
 
 class Arrow(QGraphicsLineItem):
 
-    def __init__(self, source, destination, window, create_signal=True, parent=None):
+    def __init__(self, source, destination, window, signal=None, parent=None):
         super(Arrow, self).__init__(parent)
         self.source = source
-        # if an signal does not exist create one
-        if create_signal:
-            self.signal = Signal(source.port, destination.port)
+        self.signal = Signal(source.port, destination.port) if signal is None else signal
         self.destination = destination
         self._window = window
         self.moveLine()
@@ -30,7 +28,18 @@ class Arrow(QGraphicsLineItem):
         self.signal.remove_destination()
         self.signal.remove_source()
         self._window.scene.removeItem(self)
-        self._window.signalList.remove(self)
+        if self in self._window.signalList:
+            self._window.signalList.remove(self)
+
+        if self in self._window.signalPortDict:
+            for port1, port2 in self._window.signalPortDict[self]:
+                for operation, operation_ports in self._window.portDict.items():
+                    if (port1 in operation_ports or port2 in operation_ports) and operation in self._window.opToSFG:
+                        self._window.logger.info(f"Operation detected in existing sfg, removing sfg with name: {self._window.opToSFG[operation].name}.")
+                        del self._window.sfg_dict[self._window.opToSFG[operation].name]
+                        self._window.opToSFG = {op: self._window.opToSFG[op] for op in self._window.opToSFG if self._window.opToSFG[op] is not self._window.opToSFG[operation]}
+
+        del self._window.signalPortDict[self]
 
     def moveLine(self):
         self.setPen(QPen(Qt.black, 3))