RangeError: Invalid value: Not in range 0..1, inclusive: -1

[gilvangobbato]

Hello,

I'm getting this error in my MoneyMaskedTextController with precision: 2.

The error occurs when I go out of the TextField with less than 2 digits, for example: my mask is from Brazilian real R$ 0,00, if I type only 5 cents and go out of the TextFiel, I get this error.

For example:

In this example, when I press the ritgh button, the error occurs.
My controller:

  MoneyMaskedTextController controller = new MoneyMaskedTextController(
      decimalSeparator: ',',
      thousandSeparator: '.',
      leftSymbol: 'R\$ ',
      precision: 2);

Debuging, the error appears occurs in this point on the "flutter_masked_text.dart":

  double get numberValue {
    List<String> parts = _getOnlyNumbers(this.text).split('').toList(growable: true);

    parts.insert(parts.length - precision, '.');

    return double.parse(parts.join());
  }

I think that is because the parts.length - precision = -1, so, the throw occurs

Thanks

[x4080]

Hi @gilvangobbato, I think the solution is to add condition :
from

parts.insert(parts.length - precision, '.');

to

if (parts.length >= precision) parts.insert(parts.length - precision, decimalSeparator);

@benhurott maybe you can update it in the widget ?

[gilvangobbato]

Hi @gilvangobbato, I think the solution is to add condition :
from

parts.insert(parts.length - precision, '.');

to

if (parts.length >= precision) parts.insert(parts.length - precision, decimalSeparator);

@benhurott maybe you can update it in the widget ?

Correct
I extended this class to update exactly this line. something like this:

  double get numberValue {
    List<String> parts =
        _getOnlyNumbers(this.text).split('').toList(growable: true);

    if (parts.length < precision) {
      for (var i = 1; i < precision; i++) {
        parts.insert(0, "0");
      }
    }
    parts.insert(parts.length - precision, '.');

    return double.parse(parts.join());
  }

[Miko2x]

Replace to this

updateValue(double value) {
  double valueToUse = value;

  if (value != 0.0) {
    if (value.toStringAsFixed(0).length > 12) {
      valueToUse = _lastValue;
    } else {
      _lastValue = value;
    }

    String masked = this._applyMask(valueToUse);

    if (rightSymbol.length > 0) {
      masked += rightSymbol;
    }

    if (leftSymbol.length > 0) {
      masked = leftSymbol + masked;
    }

    if (masked != this.text) {
      this.text = masked;

      var cursorPosition = super.text.length - this.rightSymbol.length;
      this.selection = TextSelection.fromPosition(TextPosition(offset: cursorPosition));
    }
  }
}

double get numberValue {
  List<String> parts = _getOnlyNumbers(this.text).split('').toList(growable: true);

  if (parts.length != 0) {
    parts.insert(parts.length - precision, '.');
  } else {
    parts.insert(0, "0");
  }

  return double.parse(parts.join());
}