/// <summary>
/// Launch the IFC Entity tree browser
/// </summary>
/// <param name="data"></param>
/// <returns>status</returns>
public bool ShowDialog(IFCExternalServiceUIData data)
{
HashSet <string> assignedEntities = new HashSet <string>();
HashSet <string> assignedPredef = new HashSet <string>();
string preSelectEnt = null;
string preSelectPDef = null;
foreach (ElementId elemId in data.GetRevitElementIds())
{
Element elem = data.Document.GetElement(elemId);
if (elem == null)
{
continue;
}
// Collect existing assignments to the "IFC Export Element* As" and "IFC Export Predefined Type*"
BuiltInParameter paramName = (elem is ElementType) ? BuiltInParameter.IFC_EXPORT_ELEMENT_TYPE_AS : BuiltInParameter.IFC_EXPORT_ELEMENT_AS;
string assignedEnt = elem?.get_Parameter(paramName)?.AsString();
if (string.IsNullOrEmpty(assignedEnt))
{
assignedEntities.Add("<null>");
}
else
{
assignedEntities.Add(assignedEnt);
}
BuiltInParameter pdefParName = (elem is ElementType) ? BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE_TYPE : BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE;
string pdefSel = elem?.get_Parameter(pdefParName)?.AsString();
if (string.IsNullOrEmpty(pdefSel))
{
assignedPredef.Add("<null>");
}
else
{
assignedPredef.Add(pdefSel);
}
}
// Set the entity and predefined type if they are all the same and not null. This is to be used to preselect them in the UI
if (assignedEntities.Count == 1 && !assignedEntities.First().Equals("<null>"))
{
preSelectEnt = assignedEntities.First();
}
if (assignedPredef.Count == 1 && !assignedPredef.First().Equals("<null>"))
{
preSelectPDef = assignedPredef.First();
}
using (Transaction tr = new Transaction(data.Document))
{
try
{
tr.Start("IFC Entity Selection");
}
catch {}
bool showTypeNodeOnly = data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_ELEMENT_TYPE_AS ||
data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE_TYPE;
EntityTree theTree = new EntityTree(showTypeNodeOnly, preSelectEntity: preSelectEnt, preSelectPdef: preSelectPDef);
bool?ret = theTree.ShowDialog();
if (ret.HasValue && ret.Value == true)
{
string selEntity = theTree.GetSelectedEntity();
string selPDef = theTree.GetSelectedPredefinedType();
data.IsReset = theTree.isReset;
foreach (ElementId elemId in data.GetRevitElementIds())
{
Element elem = data.Document.GetElement(elemId);
if (elem == null)
{
continue;
}
if (data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_ELEMENT_TYPE_AS ||
data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_ELEMENT_AS)
{
BuiltInParameter paramName = (elem is ElementType) ? BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE_TYPE : BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE;
elem?.get_Parameter(paramName)?.Set(selPDef);
data.SelectedIFCItem = selEntity;
}
else if (data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE_TYPE ||
data.ParamId.IntegerValue == (int)BuiltInParameter.IFC_EXPORT_PREDEFINEDTYPE)
{
BuiltInParameter paramName = (elem is ElementType) ? BuiltInParameter.IFC_EXPORT_ELEMENT_TYPE_AS : BuiltInParameter.IFC_EXPORT_ELEMENT_AS;
elem?.get_Parameter(paramName)?.Set(selEntity);
data.SelectedIFCItem = selPDef;
}
}
if (tr.HasStarted())
{
tr.Commit();
}
return(true);
}
}
return(false);
}