updateField method

Implementation

void updateField() {
  String updatedText = widget.controller.text;
  num? v = num.tryParse(updatedText);

  if (v == null) {
    // If the parsing fails, set to 0 or min.

    v = widget.min ?? 0;
  } else {
    // Apply min and max constraints.

    if (widget.min != null) {
      v = max(v, widget.min!);
    }
    if (widget.max != null) {
      v = min(v, widget.max!);
    }
  }

  // Controller text automatically updates to
  // the range of [widget.min] and [widget.max].

  widget.controller.text = v.toString();

  // Apply decimal places if needed.

  if (widget.decimalPlaces > 0) {
    v = double.parse(v.toStringAsFixed(widget.decimalPlaces));
  }

  // Update state provider.

  ref.watch(widget.stateProvider.notifier).state = v;
}