- added AttributeChange

utils/value.py

@@ -30,3 +30,23 @@ class ValueChanged(object):
 		self.value = value_rounded
 		if has_changed:
 			self.on_changed(value_rounded)
+
+
+class AttributeChange(object):
+	def __init__(self):
+		self.callbacks: ValueChanged = {}
+
+	def set_on_changed(self, key, on_changed: ValueChanged):
+		if key not in self.callbacks:
+			self.callbacks[key] = on_changed
+
+	def __setattr__(self, key, value):
+		try:
+			old = super().__getattribute__(key)
+			print("Change: {} from {} to {}".format(key, old, value))
+		except:
+			print("Create: {} and initialize with  {}".format(key, value))
+		super().__setattr__(key, value)
+
+		if key in self.callbacks:
+			self.callbacks[key].set(value)