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Check the current state
There are a number of methods for checking the current state of the StateMachine.
- StateMachine.isInState
- StateOfMind.isInState
- StateMachine.stateOfMind
- Subscribing to StateMachine.stream.
Generally, you should not have to interact with any of these methods too often, rather you should rely on sideEffects and the onEnter and onExit methods to make 'things' happen although the SateOfMind stream is useful as it can be wired to a Flutter StreamBuilder.
The preferred methods are:
Using isInState allows you to check the current state of the machine at any time.
Remember that due to Nested States and Concurrent States an FSM can actually be in multiple states at the one time.
When using isInState you should usually target the state lowest in the tree (where the top of the tree is the root - it's an upside-down tree).
You can also call isInState multiple times to determine what other states the FSM is in.
If you need to know multiple states then
stateOfMind is a better option.Note: This is a work in progress and currently only returns the state that was directly transitioned into (referred to internally as the currentState but that's not quite a true reflection).
A call to
stateOfMind returns a StateOfMind object that contains all of the nested ancestor states as well as any concurrent states in a tree structure.The stream can be used with a Flutter StreamBuilder to process each state update as it occurs.
Last modified 3mo ago