- TC: state IDLE introduced

- TC: send states

utils/value.py

@@ -15,7 +15,7 @@ class Value:
 		return self.value
 
 
-class ValueChanged(object):
+class ChangedFloat(object):
 	def __init__(self, on_changed, prec=2, initial=None):
 		self.on_changed = on_changed
 		self.prec = prec
@@ -32,6 +32,21 @@ class ValueChanged(object):
 			self.on_changed(value_rounded)
 
 
+class ChangedInteger(object):
+	def __init__(self, on_changed, initial=None):
+		self.on_changed = on_changed
+		self.value = initial
+
+	def set(self, value):
+		has_changed = True
+		if self.value is not None:
+			has_changed = self.value != value
+
+		self.value = value
+		if has_changed:
+			self.on_changed(value)
+
+
 class AttributeChange(object):
 	def __init__(self):
 		self.callbacks = {}