direct.fsm.FourState¶

from direct.fsm.FourState import FourState

Contains the FourState class.

Inheritance diagram

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class FourState(names, durations=[0, 1, None, 1, 1])[source]¶

Bases: object

Generic four state ClassicFSM base class.

This is a mix-in class that expects that your derived class is a DistributedObject.

Inherit from FourStateFSM and pass in your states. Two of the states should be oposites of each other and the other two should be the transition states between the first two. E.g:

          +--------+
       -->| closed | --
      |   +--------+   |
      |                |
      |                v
+---------+       +---------+
| closing |<----->| opening |
+---------+       +---------+
      ^                |
      |                |
      |    +------+    |
       ----| open |<---
           +------+

There is a fifth off state, but that is an implementation detail (and that’s why it’s not called a five state ClassicFSM).

I found that this pattern repeated in several things I was working on, so this base class was created.

notify = <direct.directnotify.Notifier.Notifier object>¶