SOLVED DESC_PARENT_COLLAPSE Twirl Down

Hello!
I have a pretty simple question about how to create a twirl down group in the Attribute Manager such as this alt text

I managed to track down that it uses DESC_PARENT_COLLAPSE, but I'm having trouble setting it up in GetDDescription(). The SDK doesn't really help with it and the forums didn't turn up any results so I'm a bit lost. Thanks for any help.

Dan

hello,

You have to set the DESC_PARENT_COLLAPSE of the "parent" to -1 so it act as a parent. For the children, just set the ID to the parent's ID.

virtual Bool GetDDescription(GeListNode* node, Description* description, DESCFLAGS_DESC& flags)
	{
		if (!description->LoadDescription(node->GetType()))
			return false;

		const DescID* singleid = description->GetSingleDescID();


		DescID cid = DescLevel(firstID, DTYPE_REAL, 0);
		// check if this parameter ID is requested (NOTE: this check is important for speed)
		if (!singleid || cid.IsPartOf(*singleid, nullptr))
		{
			// define the new parameter description
			BaseContainer settings = GetCustomDataTypeDefault(DTYPE_REAL);
			settings.SetString(DESC_NAME, "A float"_s);
			settings.SetInt32(DESC_PARENT_COLLAPSE, -1);

			// set the new parameter
			if (!description->SetParameter(cid, settings, ID_OBJECTPROPERTIES))
				return false;
		}

		cid = DescLevel(secondID, DTYPE_REAL, 0);
		if (!singleid || cid.IsPartOf(*singleid, nullptr))
		{
			// define the new parameter description
			BaseContainer settings = GetCustomDataTypeDefault(DTYPE_REAL);
			settings.SetString(DESC_NAME, "Another float"_s);
			settings.SetInt32(DESC_PARENT_COLLAPSE, firstID);

			// set the new parameter
			if (!description->SetParameter(cid, settings, ID_OBJECTPROPERTIES))
				return false;
		}

		cid = DescLevel(thirdID, DTYPE_BOOL, 0);
		if (!singleid || cid.IsPartOf(*singleid, nullptr))
		{
			// define the new parameter description
			BaseContainer settings = GetCustomDataTypeDefault(DTYPE_BOOL);
			settings.SetString(DESC_NAME, "A Bool"_s);
			settings.SetInt32(DESC_PARENT_COLLAPSE, firstID);

			// set the new parameter
			if (!description->SetParameter(cid, settings, ID_OBJECTPROPERTIES))
				return false;
		}

		flags |= DESCFLAGS_DESC::LOADED;
		return SUPER::GetDDescription(node, description, flags);
		
	}

Cheers
Manuel

Hello,

just FYI: there is also a short description and an example snippet about DESC_PARENT_COLLAPSE in the Description Settings Manual.

best wishes,
Sebastian

Thank you both for the answers!

Sorry about not finding that, Sebastian, it wasn't popping up when I searched the SDK.

Dan

hello,

this thread will be considered as Solved tomorrow is you have nothing to add.

Cheers
Manuel