شرح استخدام ويدجت ScaleTransition في فلاتر

ScaleTransition(
  alignment: Alignment.center,
  scale: _animation,
  child: Container(
    width: 200,
    height: 200,
    color: Colors.blue,
  ),
)

AnimationController _controller = AnimationController(
  vsync: this,
  duration: Duration(seconds: 2),
);

Animation<double> _animation = Tween<double>(
  begin: 1,
  end: 2,
).animate(_controller);

ScaleTransition(
  scale: _animation,
  child: Container(
    width: 200,
    height: 200,
    color: Colors.blue,
  ),
)

ScaleTransition(
  scale: _animation,
  child: Container(
    width: 200,
    height: 200,
    color: Colors.blue,
  ),
)

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ScaleTransition Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyScaleTransition(),
    );
  }
}

class MyScaleTransition extends StatefulWidget {
  const MyScaleTransition({Key? key}) : super(key: key);

  @override
  _MyScaleTransitionState createState() => _MyScaleTransitionState();
}

class _MyScaleTransitionState extends State<MyScaleTransition>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _animation;

  @override
  void initState() {
    super.initState();

    _controller = AnimationController(
      vsync: this,
      duration: const Duration(seconds: 2),
    );

    _animation = Tween<double>(
      begin: 1,
      end: 2,
    ).animate(_controller);

    _controller.repeat();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Scale Transition Demo',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Scale Transition Demo'),
        ),
        body: Center(
          child: ScaleTransition(
            scale: _animation,
            child: Container(
              width: 200,
              height: 200,
              color: Colors.blue,
              child: const Center(
                child: Text(
                  'Scale',
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 32,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}