/***************************************************/
/**** Public methods ****/
/***************************************************/
public static Definition ProjectParameter(Document document, string parameterName, ParameterType parameterType, BuiltInParameterGroup parameterGroup, bool instance, IEnumerable <Category> categories)
{
// Inspired by https://github.com/DynamoDS/DynamoRevit/blob/master/src/Libraries/RevitNodes/Elements/Parameter.cs
if (categories != null && !categories.Any())
{
BH.Engine.Reflection.Compute.RecordError($"Parameter {parameterName} of type {LabelUtils.GetLabelFor(parameterType)} could not be created because no category bindings were provided.");
return(null);
}
// Look for existing parameter definition
bool bindings = false;
IEnumerable <Definition> existingDefs = new FilteredElementCollector(document).OfClass(typeof(SharedParameterElement)).Cast <SharedParameterElement>().Select(x => x.GetDefinition());
Definition def = existingDefs.FirstOrDefault(x => x.Name == parameterName && x.ParameterGroup == parameterGroup);
if (def != null)
{
if (document.ParameterBindings.Contains(def))
{
BH.Engine.Reflection.Compute.RecordWarning($"Parameter {parameterName} already exists in group {LabelUtils.GetLabelFor(parameterGroup)}. It already has category bindings, they were not updated - please make sure they are correct.");
bindings = true;
}
else
{
BH.Engine.Reflection.Compute.RecordWarning($"Parameter {parameterName} already exists in group {LabelUtils.GetLabelFor(parameterGroup)}. It did not have any category bindings, so input bindings were applied.");
}
}
else
{
// buffer the current shared parameter file name and apply a new empty parameter file instead
string sharedParameterFile = document.Application.SharedParametersFilename;
string tempSharedParameterFile = System.IO.Path.GetTempFileName() + ".txt";
using (System.IO.File.Create(tempSharedParameterFile)) { }
document.Application.SharedParametersFilename = tempSharedParameterFile;
// Create a new shared parameter, since the file is empty everything has to be created from scratch
def = document.Application.OpenSharedParameterFile()
.Groups.Create("TempParameterGroup").Definitions.Create(
new ExternalDefinitionCreationOptions(parameterName, parameterType)) as ExternalDefinition;
// apply old shared parameter file
document.Application.SharedParametersFilename = sharedParameterFile;
// delete temp shared parameter file
System.IO.File.Delete(tempSharedParameterFile);
}
if (!bindings)
{
// Apply instance or type binding
CategorySet paramCategories = (categories == null) ? document.CategoriesWithBoundParameters() : Create.CategorySet(document, categories);
Binding bin = (instance) ?
(Binding)document.Application.Create.NewInstanceBinding(paramCategories) :
(Binding)document.Application.Create.NewTypeBinding(paramCategories);
document.ParameterBindings.Insert(def, bin, parameterGroup);
}
return(def);
}