Power State is a lightweight and flexible state management library for Flutter apps. It provides a simple and easy-to-use API that helps you manage the state of your app in a clean and efficient way. With Power State, you can easily manage your app's state and update your UI in real-time.

Usage

Step:1 Create a PowerController

Create a controller class that extends PowerController. This controller class will hold your application's state and provide methods to manipulate it.

Here's an example CounterController class:

import 'package:power_state/power_state.dart';

class CounterController extends PowerController {
  int count = 1;

  increment() {
    count++;
    notifyListeners();
  }
}

Step:2 Store controller

Instantiate your controller class using PowerVault.put() method:

final CounterController controller = PowerVault.put(CounterController());

Step:3 Use PowerBuilder and PowerSelector to access your state

Use PowerBuilder to listen for changes to your state and rebuild your UI. Use PowerSelector to select a specific value from your state and rebuild only when that value changes.:

PowerBuilder<CounterController>(
  builder: (countController) {
    return Text(countController.count.toString());
  },
),

PowerSelector<CounterController>(
  selector: () => controller.selectorValue,
  builder: (countController) {
    return Text(countController.selectorValue.toString());
  },
),

Step:4 Update your state

Update your state by calling methods on your controller and calling notifyListeners() to rebuild your UI.

controller.increment();
controller.update();

You can find a Controller that is being used by another page and redirect you to it.

final CounterController countController = PowerVault.find();

Deleting a controller

If you no longer need a controller, you can delete it from PowerVault using the PowerVault.delete

PowerVault.delete<CounterController>();

Check out the example app to see Power State in action.