Get all wall composites

[Emkave]

Good day to everybody. I have a struggle with retrieving the whole data about wall composites that exist in an Archicad project.
Here is the empty Archicad project:

and here is the list of wall composites:

I will be really glad if somebody tells me a way how to get all of the composites without passing an element or guid or any other data to the API. I just want to make a code that would return me the list of all existing wall composites.

Thank you in advance!

Operating system used: Windows 11

[Emkave]

Thank you very much for the correction of the topic's placement

[BerndSchwarzenbacher · Accepted solution]

Hi Emkave,

This code prints the composite names to the session report (works for AC27+):

ACAPI_Attribute_EnumerateAttributesByType (API_CompWallID,
    [](API_Attribute& compAttr)
{
    ACAPI_WriteReport (compAttr.header.name, false);
});

For more details about handling attributes or how to do this for older AC versions you can check the "Attribute_Test" example project in the respective API DevKits.

Or feel free to ask more for more details.

Best,
Bernd

[Emkave]

Hello. Thank you for the reply. Is there a function for archicads of versions 26 and below?

[BerndSchwarzenbacher · Accepted solution]

Something like this should work in <=AC26 (not tested):

API_AttrTypeID typeID = API_CompWallID;

API_AttributeIndex num = 0;
GSErrCode err = ACAPI_Attribute_GetNum (typeID, &num);
if (err != NoError) { return err; }

for (API_AttributeIndex id = 1; id <= num; ++id) {
  API_Attribute attr{};
  attr.header.typeID = typeID;
  attr.header.index = id;

  GS::UniString tmpUniString;
  attr.header.uniStringNamePtr = &tmpUniString;
  err = ACAPI_Attribute_Get (&attr);
  if (err == APIERR_DELETED || err == APIERR_BADINDEX) { continue; }
  if (err != NoError) { return err; }

  ACAPI_WriteReport (tmpUniString, false);
}

[Emkave]

Thanks to BerndSchwarzenbacher! Both solutions worked as I actually wanted! Thanks a lot.
Btw, I also wonder if I can actually extract the composite if I have actually selected an element. I was inspecting the memo of the selected element and the only information I found there about the composites were an integer values. I guess I have to pass them to API_Attribute attr {} variable as well. Hope my intuition is correct.

Thanks anyway!

[BerndSchwarzenbacher]

Happy to help 🙂

Your intuition is correct. An element only stores the attribute index of a component. So set the index in API_Attribute attr{} and then use ACAPI_Attribute_Get. Also be aware of ACAPI_Attribute_GetDef & ACAPI_Attribute_GetDefExt for more details of attributes.