Does Flutter support negative margin?

Question

Negative margin is generally not needed but there are situations where it’s really useful. For example: why use negative margins?

For now, when I set margin for a co

Answer 1

You can use OverflowBox to disregard certain constraints.

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Container(
          color: Colors.blue.shade300,
          child: Padding(
            padding: const EdgeInsets.all(20),
            child: Column(
              children: [
                Expanded(
                  child: Container(
                    color: Colors.white,
                    child: Center(
                      child: Text('Padding on this one.'),
                    ),
                  ),
                ),
                SizedBox(height: 20),
                Expanded(
                  child: OverflowBox(
                    maxWidth: MediaQuery.of(context).size.width,
                    child: Container(
                      color: Colors.red.shade300,
                      child: Center(
                        child: Text('No padding on this one!'),
                      ),
                    ),
                  ),
                ),
                SizedBox(height: 20),
                Expanded(
                  child: Container(
                    color: Colors.yellow.shade300,
                    child: Center(
                      child: Text('Look, padding is back!'),
                    ),
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

Result: