update method

void update(
  1. double deltaDy, {
  2. required bool expanded,
})

Implementation

void update(double deltaDy, {required bool expanded}) {
  if (expanded) {
    offset = (offset + deltaDy).clamp(0.0, 280.0);
  } else {
    offset = (offset + deltaDy).clamp(-280.0, 240.0);
  }
}