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NodeData based classic plugin classes can implement NodeData::GetDEnabling(). This allows to dynamically enable and disable parameters in the Attribute Manager.

NodeData::GetDEnabling() corresponds to C4DAtom::GetEnabling().

Usage

NodeData::GetDEnabling() is called with the DescID of each parameter. The function simply returns true if the given parameter should be enabled and false if the given parameter should be disabled.

  Bool GetDEnabling(GeListNode* node, const DescID& id, const GeData& t_data, DESCFLAGS_ENABLE flags, const BaseContainer* itemdesc)
  {
    if (node == nullptr)
      return false;
 
    // check parameter ID
    switch (id[0].id)
    {
      case EXAMPLE_GENERATOR_PARAMETER_VALUE:
      {
        // get the value of another parameter
        GeData data;
        node->GetParameter(EXAMPLE_GENERATOR_PARAMETER_BOOL, data, DESCFLAGS_GET::NONE);
 
        // if true, then enable the parameter
        // if not, disable the parameter
        if (data.GetBool())
          return true;
        else
          return false;
 
        break;
      }
    }
 
    return SUPER::GetDEnabling(node, id, t_data, flags, itemdesc);
  }

The arguments of the function are:

The node itself.
The parameter DescID in question.
The parameter value.
Some flags that are currently not used.
The parameter description stored in a BaseContainer.

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