increment method

Implementation

void increment() {
  num currentValue = num.tryParse(widget.controller.text) ?? 0;
  currentValue += widget.interval;

  // Automatically cap at the max if specified.

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

  // Update the state provider directly.

  ref.read(widget.stateProvider.notifier).state = currentValue;
}