How can I limit the length of a text field input in flutter?

Question

The TextField widget doesn't seem to have a "limit" attribute to limit the number of characters that can be typed. How I can enforce that only a certain number of characters can be provided as input in a TextField Widget. I tried looking at the decoration property and potentially setting the limit there somehow but that didn't seem to work either. Is there a different widget I should be using?

Answer 1

I had to add an additional snippet to what RSproute mentioned. The full code is here:

TextEditingController _controller = new TextEditingController();
String text = ""; // empty string to carry what was there before it 
onChanged
int maxLength = ...
...
new TextField(
    controller: _controller,
    onChange: (String newVal) {
        if(newVal.length <= maxLength){
            text = newVal;
        }else{
            _controller.value = new TextEditingValue(
                text: text,
                selection: new TextSelection(
                    baseOffset: maxLength,
                    extentOffset: maxLength,
                    affinity: TextAffinity.downstream,
                    isDirectional: false
                ),
                composing: new TextRange(
                    start: 0, end: maxLength
                )
            );
            _controller.text = text;
        } 
    }
);