Flutter rotated text not filling available space

Question

I have a container holding some text and when the text is normal horizontal position it is split into 2 lines as it does not fit in a single line, which I understand:

Container(
                    width: 30,
                    height: 250,
                    color: Color.fromRGBO(254, 242, 0, 1),
                    child: Center(
                      child: Text(
                        "dB per H",
                        style: TextStyle(
                          fontSize: 12,
                          color: Colors.black,
                        ),
                      ),
                    ),
                  ),

This will be rendered as:

Now I am rotating the text so it is rendered in vertical direction, where the container has plenty of space. However it is still split in 2 lines, when the expected is that now it would fit with no problem.

How to fix this?

Container(
                    width: 30,
                    height: 250,
                    color: Color.fromRGBO(254, 242, 0, 1),
                    child: Center(
                      child: Transform.rotate(
                        angle: -pi / 2,
                        child: Text(
                          "dB per H",
                          style: TextStyle(
                            fontSize: 12,
                            color: Colors.black,
                          ),
                        ),
                      ),
                    ),
                  ),

This will be rendered as:

Solution 1

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Title')),
        body: Container(
          width: 30,
          height: 250,
          color: Color.fromRGBO(254, 242, 0, 1),
          child: Center(
            child: RotatedBox(
              quarterTurns: 3,
              child: Text(
                "dB per H",
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 12,
                  color: Colors.black,
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}

Solution 2

try this

new RotationTransition(
  turns: new AlwaysStoppedAnimation(90 / 360),
  child: Container(
    width: 250,
    height: 60,
    color: Color.fromRGBO(254, 242, 0, 1),
    child: new Center(
      child: new Text("Lorem ipsum"),
    ),
  ),
),

Comments

[meditat]

try adding a property to Text maxLines: 1

[aswin darma]

i think you need to find another alternative, when you rotate the text, the max width of the text is following the container width

[codeKiller]

@aswindarma ok, what other alternative??

[codeKiller]

even though i have not tested all the other proposed solutions, and even though you have not added any further explanation, your solution works with the minimum changes so i accept your answer. Thanks