onObservableChange method

Implementation

onObservableChange(Observable? observable)
{
  String? template = signature;

  // resolve all bindings
  Map<String?, dynamic>? variables;
  if ((bindings != null) && (scope != null))
    for (Binding binding in bindings!)
    {
      dynamic v;

      // get binding source
      Observable? source = scope!.getObservable(binding, requestor: observable);
      if (source != null)
      {
        dynamic _value = source.get();
        v = binding.translate(_value);
      }

      // is this an eval?
      if (isEval)
      {
        if (variables == null) variables = Map<String?, dynamic>();
        if ((source is BLOB.BlobObservable) && (!S.isNullOrEmpty(v)))
             variables[binding.signature] = 'blob';
        else variables[binding.signature] = v;
      }

      // simple replacement of string values
      else
      {
        v = S.toStr(v) ?? "";
        template = template!.replaceAll(binding.signature, v.toString());
      }
    }

  // set the value
  dynamic value = (isEval) ? doEvaluation(signature, variables: variables) : template;

  // 2-way binding?
  if (observable?.twoway == this) value = observable!.value;

  // set the target value
  set(value);
}