- unfortunately the fix for issue where while zooming the mouse cursor shape was not updated braked something in way that Matplotlib work with PyQt5, therefore I removed it

FlatCAMCommon.py

@@ -46,3 +46,26 @@ class LoudDict(dict):
         """
 
         self.callback = callback
+
+
+class FCSignal:
+    """
+    Taken from here: https://blog.abstractfactory.io/dynamic-signals-in-pyqt/
+    """
+
+    def __init__(self):
+        self.__subscribers = []
+
+    def emit(self, *args, **kwargs):
+        for subs in self.__subscribers:
+            subs(*args, **kwargs)
+
+    def connect(self, func):
+        self.__subscribers.append(func)
+
+    def disconnect(self, func):
+        try:
+            self.__subscribers.remove(func)
+        except ValueError:
+            print('Warning: function %s not removed '
+                  'from signal %s' % (func, self))