zo_animated_border 0.0.1

A package that gives us a modern way to show gradient border and animate it

example/lib/main.dart

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

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

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a purple toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: "Animated Border"),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          //
          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
          // action in the IDE, or press "p" in the console), to see the
          // wireframe for each widget.
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            SizedBox(
              height: 10,
              width: double.infinity,
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: [
                ZoAnimatedGradientBorder(
                  width: 100,
                  height: 100,
                  borderRadius: 100,
                  borderThickness: 4,
                  gradientColor: [Colors.yellow, Colors.orange],
                  duration: Duration(seconds: 4),
                  child: Container(
                      alignment: Alignment.center,
                      color: Colors.black,
                      child: Text(
                        "Color",
                        style: TextStyle(color: Colors.black),
                      )),
                ),
                ZoAnimatedGradientBorder(
                  width: 100,
                  height: 100,
                  borderRadius: 100,
                  borderThickness: 4,
                  gradientColor: [Colors.red, Colors.blue],
                  duration: Duration(seconds: 4),
                  child: Container(
                      alignment: Alignment.center,
                      color: Colors.black,
                      child: Text(
                        "Color",
                        style: TextStyle(color: Colors.black),
                      )),
                ),
                ZoAnimatedGradientBorder(
                  width: 100,
                  height: 100,
                  borderRadius: 100,
                  borderThickness: 4,
                  gradientColor: [Colors.orange, Colors.white, Colors.green],
                  duration: Duration(seconds: 4),
                  child: Container(
                      alignment: Alignment.center,
                      color: Colors.black,
                      child: Text(
                        "Color",
                        style: TextStyle(color: Colors.black),
                      )),
                ),
              ],
            ),
            SizedBox(
              height: 60,
            ),
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 10),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: [
                  ZoAnimatedGradientBorder(
                    width: 150,
                    height: 45,
                    borderThickness: 2,
                    shouldAnimate: false,
                    gradientColor: [Colors.red, Colors.blue],
                    duration: Duration(seconds: 4),
                    child: Container(
                        alignment: Alignment.center,
                        color: Colors.black,
                        child: Text(
                          "Click Me",
                          style: TextStyle(color: Colors.white),
                        )),
                  ),
                  ZoAnimatedGradientBorder(
                    width: 150,
                    height: 45,
                    borderThickness: 3,
                    shouldAnimate: false,
                    gradientColor: [Colors.orange, Colors.white, Colors.green],
                    duration: Duration(seconds: 4),
                    child: Container(
                        alignment: Alignment.center,
                        color: Colors.white,
                        child: Text(
                          "Click Me",
                          style: TextStyle(color: Colors.black),
                        )),
                  ),
                ],
              ),
            )
          ],
        ),
      ),
      // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}