How to Create a Property Using Add-ons

[NMK195]

Hi all,
I'm using Archicad API 22 and I want to create a group and a property for the entire model, as shown in the image below:

I found the example property_Test, but it only creates a property for the selected object, not for the entire model. I’ve tried modifying it, but haven’t been successful.
Can anyone help me with this?

	API_PropertyGroup group;
	ASSERT_NO_ERROR (PropertyTestHelpers::GetCommonExamplePropertyGroup (group));

	API_PropertyDefinition definition;
	definition = PropertyTestHelpers::CreateExampleIntPropertyDefinition (group);
	// ACAPI_ElementList_AddProperty creates the property definition, if it doesn't exist yet
	ASSERT_NO_ERROR (ACAPI_ElementList_AddProperty (definition, PropertyTestHelpers::GetSelectedElements()));
	ASSERT (definition.guid != APINULLGuid);

	// It works for already existing properties too
	ASSERT_NO_ERROR (ACAPI_ElementList_AddProperty (definition, PropertyTestHelpers::GetSelectedElements()));

[Ralph Wessel]

I think the code you want is in the Property_Text example. Take a look at the function SimpleTestPropertyDefinitions() in the file Property_Test.cpp, specifically where it calls ACAPI_Property_CreatePropertyDefinition to create a new property definition.

[NMK195]

Hi!
Thank you for answering my question, but I still haven't been able to do it. Could you help me by adjusting the code below?

void CreateProperty(API_PropertyGroup group, GS::UniString str, GS::Array<API_Guid> listElement)
{
	GS::Array<API_PropertyDefinition> defs;
	if (ACAPI_Property_GetPropertyDefinitions(group.guid, defs) != NoError) {
		DBPrintf("Cannot retrieve existing property definitions.\n");
		return;
	}
	for (auto& d : defs) {
		if (d.name == str) {
			DBPrintf("Definition \"%ls\" already exists—no need to recreate.\n",
				str.ToCStr());
			return;
		}
	}

	API_PropertyDefinition definition;
	definition.guid = APINULLGuid;
	definition.groupGuid = group.guid;
	definition.name = str;
	definition.description = str;

	definition.collectionType = API_PropertySingleCollectionType;
	definition.valueType = API_PropertyStringValueType;
	definition.measureType = API_PropertyDefaultMeasureType;
	definition.defaultValue.basicValue.singleVariant.variant.type = definition.valueType;
	definition.defaultValue.basicValue.singleVariant.variant.uniStringValue = "";

	ASSERT_NO_ERROR(ACAPI_ElementList_AddProperty(definition, listElement));
	ASSERT(definition.guid != APINULLGuid);

	// It works for already existing properties too
	ASSERT_NO_ERROR(ACAPI_ElementList_AddProperty(definition, listElement));

}

[Ralph Wessel]

The Archicad 22 API is a bit too old for me - I no longer have it installed. Are you able to work with anything more recent?