setFlex method

Implementation

setFlex(int v)
{
  // create the _flex observable if it
  // hasn't already been created
  if (_flex == null)
  {
    _flex = IntegerObservable(Binding.toKey(id, 'flex'), null, scope: scope);
    _flex!.registerListener(onPropertyChange);
  }

  // set the width
  _flex?.set(v, notify: false);
}