Delete specific Group

Developers Ruby API
,
11

Here is my final … it takes a few minutes to delete the groups inside an operation.

EDIT: Actually, made a change. debug is now a named argument.

(Note SketchUp itself is purging the unused group definitions from the Definitions collection because they no longer have any instances. We have no control over this.)

    def delete_truss_gussets(inst_name = 'plates', debug: false)
      gussets_deleted = []
      groups_deleted = 0
      model = Sketchup.active_model
      dlist = model.definitions
      puts
      puts "Begin Truss Gusset Purging"
      model.start_operation('Purge Gusset Groups',true)
        #
        dlist.each do |cdef|
          next unless cdef.group? && cdef.instances.size > 0 &&
            cdef.instances[0].name == inst_name
          papa = cdef.instances[0].parent
          if papa.name.start_with?('T') && papa.instances.size > 0 &&
            papa.instances[0].layer.name.start_with?('Trusses')
            cname = cdef.name
            puts " Processing gusset group defintion: \"#{cname}\"" if debug
            cdef.instances.each_with_index do |inst,i|
              if inst.name == inst_name
                puts "  Deleting \"#{inst_name}\" instance index #{i}" if debug
                gussets_deleted << cname if cdef.instances.size == 1
                inst.erase!
                groups_deleted += 1
              end
            end
          end
        end
        puts "Number of gusset group instances deleted: #{groups_deleted}"
        puts "Number of gusset group definitions to purge: #{gussets_deleted.size}"
        puts
        puts " ... please wait, Purging ..."
        puts
        #
      model.commit_operation
      #
      orphans = []
      dlist.each do |cdef|
        if !cdef.group? && !cdef.image? && cdef.instances.size == 0
          orphans << cdef
        end
      end
      if orphans.size > 0
        puts "Number of orphaned definitions that can be purged: #{orphans.size}"
        names = orphans.map {|cdef| cdef.name }
        puts names.inspect if debug
        choice = UI.messagebox("Purge #{orphans.size} Gusset Components ?",MB_YESNO)
        if choice == IDYES
          model.start_operation('Purge Gusset Components',true)
            #
            if dlist.respond_to?(:remove)
              orphans.each {|cdef| dlist.remove(cdef) }
            else
              dlist.purge_unused
            end
            #
          model.commit_operation
        end
      end
      puts "Done\n"
    end
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