GetMultipleObjects and preselect

Scripting
,
1

I’m using Rhino.Input.RhinoGet.GetMultipleObjects with filters but if the user preselects objects, they are able to select objects that should be filtered out. This is fine - everything works and the script ignores those filtered-out objects, but they remain selected on screen at the end of the script and I want the screen to highlight only objects were actually filtered. How do I deselect the objects that should be filtered out? Or, how can I deselect everything and then select just the objects that were filtered?

2

The normal Rhino behavior if preselecting is allowed but some of the preselected objects do not match the filter criteria is:

If at least one of the objects does match the filter criteria, it leaves the others selected as well, or,
if none of the objects match, to unselect everything and force a post-selection.

Rhinoscriptsyntax GetObjects() does the same - but it uses a custom Rhino.Input.Custom.GetObject() with GetMultiple(). (not GetMultipleObjects)

What you can do if you want the preselected non-matching objects to be deselected is:

While still in the object getter function, unselect everything, then re-select the objects that were actually filtered. Below is an example:

import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc

def CustomGetObjs(prompt,g_filt=None,a_filt=None,c_filt=None,ps=True):
    go = Rhino.Input.Custom.GetObject()
    go.SetCommandPrompt(prompt)
    #allow preselected object
    go.EnablePreSelect(ps,True)
    #main object type filter
    if g_filt: go.GeometryFilter=g_filt
    #secondary object attribute filter
    if a_filt: go.GeometryAttributeFilter=a_filt
    #custom geometry filter - can be anything
    if c_filt: go.SetCustomGeometryFilter(c_filt)
    
    get_rc = go.GetMultiple(1,0)
    if get_rc==Rhino.Input.GetResult.Cancel: return
    if get_rc==Rhino.Input.GetResult.Object:
        #some objects match selection criteria
        #unselect all
        sc.doc.Objects.UnselectAll()
        #select only the objects that were filtered
        for i in range(go.ObjectCount):
            go.Object(i).Object().Select(True)
        return go.Objects()

#planar closed curves
def cp_crv_filt(rhino_object, geometry, component_index):
    return rs.IsCurvePlanar(geometry) and rs.IsCurveClosed(geometry)
    
def TestFunction():
    prompt="Select objects"
    gf=Rhino.DocObjects.ObjectType.Curve
    af=Rhino.Input.Custom.GeometryAttributeFilter.ClosedCurve
    result=CustomGetObjs(prompt,gf,af,cp_crv_filt)
    if result is None: return
    print result

TestFunction()
3

Thanks!