I've got row with some text on the left and right side of it. center is expanded so both texts are located at left, right corners.

Row( children: [  Text('left Text'),
 Expanded(child: Text('')),
Text('right Text'
),
]),

Now I I wrap this Row in a Container with color then the whole row will get background color.

Container( color: Colors.green,
child:MY_ROW()
)

What I want now is to put some background color not on the entire row but controllable part of it, to make a progress bar. is that possible ? Also if this progress bar could be animated that would be a plus :)

CodePudding user response：

Here is the code

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

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

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

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

class _MyHomePageState extends State<MyHomePage> {
  double _percent = 0.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: MyCustomProgressBar(percent: _percent),
      floatingActionButton: FloatingActionButton(
        onPressed: () => setState(() => _percent < 100 ? _percent  = 10 : null),
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}

class MyCustomProgressBar extends StatefulWidget {
  final double percent;
  const MyCustomProgressBar({
    Key? key,
    required this.percent,
  }) : super(key: key);

  @override
  State<MyCustomProgressBar> createState() => _MyCustomProgressBar();
}

class _MyCustomProgressBar extends State<MyCustomProgressBar> {
  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 70,
      child: Stack(
        //direction: Axis.horizontal,
        children: [
          AnimatedContainer(
            width: MediaQuery.of(context).size.width / 100 * widget.percent,
            color: Colors.green,
            duration: const Duration(milliseconds: 500),
          ),
          Row(
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(widget.percent.toString()),
              const Text('Right text'),
            ],
          ),
        ],
      ),
    );
  }
}