Flutter: Call a function on a child widget's state

Question

I\'ve created a stateful widget and its parent widget needs to call a function that lives in the child\'s state.

Specifically, I have a class PlayerContainer that create

Answer 1

With a simple application you could simply create the play button in the same Widget as the VideoPlayer. By combining the PlayerContainer with its parent you are increasing the size of the scope of the Widget State so that everything that need access to it is part of the single larger Widget.

The main ways that a child Widget can be influenced by an ancestor are: by being rebuilt with different parameters, or by listening to something that the ancestor changes. For the latter you can use an InheritedWidget somewhere about the child. If the child refers to the InheritedWidget it gets rebuilt when the IW changes. Another way is to listen to an event stream generated by the ancestor.

You may find it easiest to just build your whole page in a single build until this becomes unwieldy.