How do I input a TextButton background color to a function in Flutter/dart-CodePudding

I'm trying to create a function where under buildKey I can input two elements, the background color and the soundNumber so that when buildKey is called I can enter say buildKey(red, 2) or buildKey(colName: red, soundNumber: 2) etc.

The soundNumber element works however no matter what I try I can't get a valid background color input to work.

Any help hugely appreciated.



class _MyHomePageState extends State<MyHomePage> {
  void playSound(int noteNumber) {
    AssetsAudioPlayer.newPlayer().open(
      Audio("/assets/note$noteNumber.wav"),
    );
  }

  Expanded buildKey({required MaterialColor color, required int soundNumber}) {
    return Expanded(
      child: TextButton(
        style: TextButton.styleFrom(
          backgroundColor: color,
        ),
        onPressed: () {
          playSound(soundNumber);
        },
        child: const Text(''),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      body: SafeArea(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: [
            buildKey(color: MaterialStateProperty.all(Colors.red), soundNumber: 1),
          ],
        ),
      ),
    );
  }
}

CodePudding user response：

You have to use MaterialStateProperty class to apply color. Here is the Example:

TextButton(
    child: Text('Your Text'),
    style: ButtonStyle(backgroundColor: MaterialStateProperty.all(Colors.red)),
    onPressed: () {},
),

CodePudding user response：

Was helped with a fix. It kept the original styleFrom on the TextButton instead of using MaterialStateProperty. I was inputing the argument incorrectly so using Color as the data type worked.

Expanded buildKey({required Color colName, required int soundNumber}) {
    return Expanded(
      child: TextButton(
        style: TextButton.styleFrom(
          backgroundColor: colName,
        ),
        onPressed: () {
          playSound(soundNumber);
        },
        child: const Text(''),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      body: SafeArea(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: [
            buildKey(colName: Colors.red, soundNumber: 1),
            buildKey(colName: Colors.orange, soundNumber: 2),
            buildKey(colName: Colors.yellow, soundNumber: 3),
            buildKey(colName: Colors.green, soundNumber: 4),
            buildKey(colName: Colors.teal, soundNumber: 5),
            buildKey(colName: Colors.blue, soundNumber: 6),
            buildKey(colName: Colors.purple, soundNumber: 7),
          ],
        ),
      ),
    );
  }
}