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A minimal, easy to use responsive framework for building UI for all screen sizes using the Boostrap breakpoints by default.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:responsiveness/responsiveness.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  static const containerSize = ResponsiveValue<Size>(
    xs: Size(double.infinity, 700),
    sm: Size(double.infinity, 300),
  );

  static const actions = ResponsiveValue<List<Widget>>(
    xs: [_MyPopupMenuButton()],
    sm: [_Page1Button(), _Page2Button()],
  );

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        appBar: AppBar(
          title: const Text("Responsiveness Example"),
          actions: actions.of(context),
        ),
        body: ResponsiveParent(
          //for screen sizes xs, xxl light theme
          //for screen sizes sm, md, lg, xl dark theme
          xs: (child) => Theme(data: ThemeData.light(), child: child),
          sm: (child) => Theme(data: ThemeData.dark(), child: child),
          xxl: (child) => Theme(data: ThemeData.light(), child: child),
          child: Builder(builder: (context) {
            final textStyle = Theme.of(context).textTheme.bodyMedium;
            return Container(
              color: Theme.of(context).cardColor,
              width: containerSize.of(context).width,
              height: containerSize.of(context).height,
              margin: const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
              child: Center(
                child: ResponsiveChild(
                  xs: Text("Screen Size xs", style: textStyle),
                  sm: Text("Screen Size sm", style: textStyle),
                  md: Text("Screen Size md", style: textStyle),
                  lg: Text("Screen Size lg", style: textStyle),
                  xl: Text("Screen Size xl", style: textStyle),
                  xxl: Text("Screen Size xxl", style: textStyle),
                ),
              ),
            );
          }),
        ),
      ),
    );
  }
}

class _Page1Button extends StatelessWidget {
  const _Page1Button();

  @override
  Widget build(BuildContext context) {
    return TextButton(
      onPressed: () {},
      child: const _LinkText("Page One"),
    );
  }
}

class _Page2Button extends StatelessWidget {
  const _Page2Button();

  @override
  Widget build(BuildContext context) {
    return TextButton(onPressed: () {}, child: const _LinkText("Page Two"));
  }
}

class _MyPopupMenuButton extends StatelessWidget {
  const _MyPopupMenuButton();

  @override
  Widget build(BuildContext context) {
    return PopupMenuButton(
      itemBuilder: (context) {
        return [
          PopupMenuItem(
            onTap: () {},
            child: const Text("Page One"),
          ),
          PopupMenuItem(
            onTap: () {},
            child: const Text("Page Two"),
          ),
        ];
      },
    );
  }
}

class _LinkText extends StatelessWidget {
  const _LinkText(this.text);

  final String text;

  @override
  Widget build(BuildContext context) {
    return Text(
      text,
      style: const TextStyle(color: Colors.white),
    );
  }
}
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Publisher

verified publisherdigital-confidence.de

A minimal, easy to use responsive framework for building UI for all screen sizes using the Boostrap breakpoints by default.

Repository (GitHub)
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Documentation

API reference

License

MIT (license)

Dependencies

flutter

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