How to trigger setState() of any other Stateful Class?

Question

I have two stateful states, ABCState and XYZState, I want to call setState() on ABCState from XYZState so that I can trigger a redraw of ABCState

class ABCState extends State<ABC> {

}

& 

Class XYZState extends State<XYZ> {
    // Call .setState() of ABCState
}

I tried to play around with keys, but somehow not able to do so. Appreciate your help

@HemanthRaj My usecase is to redraw all widgets because of some user actions. — Deepak Kr Gupta, Dec 19 '17 at 06:20
I suppose on calling `setState`, flutter redraws only those widgets whose state is changed. Why would you redraw all the widgets. You are putting more load on rendering process. — Hemanth Raj, Dec 19 '17 at 06:25
I think [this](https://stackoverflow.com/questions/43778488/force-flutter-to-redraw-all-widgets) is similar. — Hemanth Raj, Dec 19 '17 at 06:32

score 2 · Answer 1 · answered Dec 19 '17 at 09:32

2

This is a bad idea. But if you want to do it, you can :

Use GlobalKey, which allows to get state/context/widget
Use BuildContext of the children of your desired stateful widget. Using context.ancestorStateOfType(const TypeMatcher<MyStatefulWidget>());

answered Dec 19 '17 at 09:32

Rémi Rousselet

1 Answers1