IgnoreChangeTest<S> typedef

bool IgnoreChangeTest (S state)

A test of whether or not your converter function should run in response to a State change. For advanced use only.

Some changes to the State of your application will mean your converter function can't produce a useful ViewModel. In these cases, such as when performing exit animations on data that has been removed from your Store, it can be best to ignore the State change while your animation completes.

To ignore a change, provide a function that returns true or false. If the returned value is true, the change will be ignored.

If you ignore a change, and the framework needs to rebuild the Widget, the builder function will be called with the latest ViewModel produced by your converter function.

Implementation

typedef IgnoreChangeTest<S> = bool Function(S state);