Flutter's example code to implement a suspended UI using stack

stack features

In Flutter, you can use Stack and Positioned to create a suspended UI. Stack allows you to stack multiple widgets together, while Positioned is used to position the widgets where they are in Stack.

Example

Here is a simple example showing how to create a floating button:

import 'package:flutter/';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Floating UI Example'),
        ),
        body: MyFloatingUI(),
      ),
    );
  }
}

class MyFloatingUI extends StatefulWidget {
  @override
  _MyFloatingUIState createState() => _MyFloatingUIState();
}

class _MyFloatingUIState extends State<MyFloatingUI> {
  bool isFloatingUIVisible = false;

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        // Your main content goes here
        Center(
          child: Text(
            'Main Content',
            style: TextStyle(fontSize: 20),
          ),
        ),
        
        // Floating UI
        Visibility(
          visible: isFloatingUIVisible,
          child: Positioned(
            bottom: 16,
            right: 16,
            child: FloatingActionButton(
              onPressed: () {
                // Handle floating button tap
                print('Floating Button Tapped');
              },
              child: Icon(),
            ),
          ),
        ),
      ],
    );
  }

  // Show/hide the floating UI based on some condition
  void toggleFloatingUI() {
    setState(() {
      isFloatingUIVisible = !isFloatingUIVisible;
    });
  }
}

In this example, MyFloatingUI is a StatefulWidget, which contains a Stack, which includes a main content (Text) and a floating button (FloatingActionButton). Visibility widget allows the visibility of the floating button to be controlled based on the conditions. In this example, the floating button is visible when isFloatingUIVisible is true, and is not visible when false.

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