topic Re: Override in view doesn't work on nested families (with revit api) in Revit API Forum

Override in view doesn't work on nested families (with revit api)

PieterL_TM — Mon, 24 Jun 2024 13:17:22 GMT

Hi there,

I have a python (test)script to override elements in view. It works on most elements, but not on doors and windows (which are wall-based families consisting of multiple nested families). If I select the nested families it does work.

This is the result I'm getting:

Here's my code:

# -*- coding: utf-8 -*- from Autodesk.Revit.DB import * from Autodesk.Revit.UI.Selection import * uidoc = __revit__.ActiveUIDocument doc = uidoc.Document active_view = doc.ActiveView selection = uidoc.Selection.GetElementIds() all_patterns = FilteredElementCollector(doc).OfClass(FillPatternElement).ToElements() solid_pattern = None for pat in all_patterns: if pat.GetFillPattern().IsSolidFill: solid_pattern = pat break ovs = OverrideGraphicSettings() ovs.SetCutForegroundPatternColor(Color(255,165,0)) ovs.SetCutForegroundPatternId(solid_pattern.Id) ovs.SetSurfaceForegroundPatternColor(Color(255,165,0)) ovs.SetSurfaceForegroundPatternId(solid_pattern.Id) t = Transaction(doc, "set overrides") t.Start() for id in selection: active_view.SetElementOverrides(id, ovs) t.Commit()

Overriding it manually (not through a script) does work as expected

Re: Override in view doesn't work on nested families (with revit api)

TripleM-Dev.net — Mon, 24 Jun 2024 19:01:19 GMT

Hi @PieterL_TM ,

Uhm, never looked into that. Seems the manual override in the UI applies it to all the nested elements of the selected object, same with Groups, override the group and all items in the group get the override, but a new element added afterwards to the group doesn't get the override.

So you need to check the selection for elements with (shared) nested components and add those nested components to the selection to be overwritten.

For familyinstances check GetSubComponentIds and for groups check all GetMemberIds

And then there's still Curtainwalls and maybe other elements. So a generic method might be GetDependentElements (Will return more than needed!, like Sketchline/plane etc, so those should be filtered out first.)

- Michel

Re: Override in view doesn't work on nested families (with revit api)

PieterL_TM — Tue, 25 Jun 2024 06:44:31 GMT

@TripleM-Dev.net Thanks!
That works, somehow it still seems counterintuitive. But like you said, if you override all the subcomponents, the UI shows as expected.

For anyone facing the same issue, I added this to my code (feel free to give me tips as I never truly learned how to code):

selection = list(uidoc.Selection.GetElementIds()) for e_id in selection: e = doc.GetElement(e_id) if isinstance(e, FamilyInstance): subcomponents = e.GetSubComponentIds() selection.extend(subcomponents)