how to use DESC_ACCEPT / DESC_REFUSE [SOLVED]

Helper

On 23/05/2015 at 22:18, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   15+
Platform:   Windows ;
Language(s) :     C++ ;

---------
I'm creating a link box dynamically, inside a tag, in GetDDescription()

  
cid = DescLevel(MATERIAL_LINK, DTYPE_BASELISTLINK, 0);
if (!singleid || cid.IsPartOf(*singleid, nullptr)) // important to check for speedup c4d!
{
    BaseContainer slink = GetCustomDataTypeDefault(DTYPE_BASELISTLINK);
    slink.SetString(DESC_SHORT_NAME, "Material");
    slink.SetString(DESC_NAME, "Material");
    slink.SetContainer(DESC_ACCEPT, MY_MATERIAL_PLUGIN_ID);
    if (!description->SetParameter(cid, slink, DescLevel(TAG_GROUP)))
        return true;
}

I want to accept only my MaterialData plugin.

Helper

On 24/05/2015 at 10:41, xxxxxxxx wrote:

There seems to be some confusion about them and not much information.

https://developers.maxon.net/forum/topic/2094/1444_descrefuse--descaccept&KW=DESC_ACCEPT

If you can't get it working, another approach is to check for the MSG_DESCRIPTION_CHECKDRAGANDDROP message. There you can accept/refuse programmatically:

// NodeData.Message
//*---------------------------------------------------------------------------*
Bool GCBInfoTag::Message(GeListNode* node, LONG type, void* data)
//*---------------------------------------------------------------------------*
{
	if (!node)	return FALSE;
	if (type == MSG_DESCRIPTION_CHECKDRAGANDDROP)
		return MsgCheckDragAndDrop(static_cast<DescriptionCheckDragAndDrop*>(data), static_cast<BaseTag*>(node));
	return SUPER::Message(node,type,data);
}
// GCBInfoTag.MsgCheckDragAndDrop - Message MSG_DESCRIPTION_CHECKDRAGANDDROP
//*---------------------------------------------------------------------------*
Bool GCBInfoTag::MsgCheckDragAndDrop(DescriptionCheckDragAndDrop* dcdd, BaseTag* tag)
//*---------------------------------------------------------------------------*
{
	// Accept/Decline
	if (!dcdd)					return TRUE;
	// GreeblerObj/Tag LinkBox
	if (dcdd->id[0].id == TGCBINFO_LINK)
	{
		BaseObject*		orig =		tag->GetObject();
		if (!orig)					return FALSE;
		BaseList2D*		element =	static_cast<BaseList2D*>(dcdd->element);
		if (!element)				return FALSE;
		// ----------				Must be GreeblerObject or GreeblerTag
		dcdd->result =				element->IsInstanceOf(ID_GREEBLEROBJ) || element->IsInstanceOf(ID_GREEBLERTAG);
	}
	return TRUE;
}

Helper

On 25/05/2015 at 03:59, xxxxxxxx wrote:

Hi Mohamed,

Originally posted by xxxxxxxx
slink.SetContainer(DESC_ACCEPT, MY_MATERIAL_PLUGIN_ID);

A container isn't set there as MY_MATERIAL_PLUGIN_ID seems to be an integer value.
Here's how you can simply set the DESC_ACCEPT container:

BaseContainer accept;
accept.SetInt32(MY_MATERIAL_PLUGIN_ID, 1);
slink.SetContainer(DESC_ACCEPT, ac);

Helper

On 25/05/2015 at 07:50, xxxxxxxx wrote:

thanks Robert, and Yannick, this is quite simple and straight forward "I encourage to put this example in the SDK documentation".

Helper

On 25/05/2015 at 08:25, xxxxxxxx wrote:

Originally posted by xxxxxxxx

I encourage to put this example in the SDK documentation.

That's a good idea. I'll add a short code snippet to DESC_ACCEPT and DESC_REFUSE.