vGen | General API to virtual Joysticks | Game Engine library

I suggest a different methodology. I'll guess lacking sample data:

The problem is here if new_value and not self.last_value:

So the first part is looking for if new_value has a Truthy value. AND it's looking for if self.last_value has a Falsey value. This gets muddy when you start comparing two different booleans to each other.

The first part is really looking to see if there is a value in new_value. So we can instead compare it to none. The second part is really looking to see if the two booleans match, so we can just compare them to each other.

Update the line to this, and it should work for transitions in either direction.

if new_value is not None and new_value is not self.last_value:

Edit:

As per your comments: There are a couple ways we can track what the phase transitions are with out having to look up each one.

Option One:

Using one function to track both transition to false from true and to true from false. We can pass the value back to the printer function.

What range/data is selected at the time the chart is created can affect the outcome: I typically start by removing all series from any chart I create in code, before adding in the specific data I want to see.

Untested: