Get Group Owner

[tictactoe]

The following Code makes groups in groups.

	
width = 200
depth = 100
pts = []  
pts[0] = [0, 0, 0]  
pts[1] = [width, 0, 0]  
pts[2] = [width, depth, 0]  
pts[3] = [0, depth, 0]  
	
model = Sketchup.active_model

g1 = model.entities.add_group 
g1.entities.add_face pts
g1.transformation = Geom;;Transformation.new([10,0,10])
	
g2 = g1.entities.add_group 
g2.entities.add_face pts 
g2.transformation = Geom;;Transformation.new([20,0,20])

g3 = g2.entities.add_group 
g3.entities.add_face pts 
g3.transformation = Geom;;Transformation.new([30,0,30])
	
puts "model; " + model.entityID.to_s
puts "g1; " + g1.entityID.to_s
puts "g2; " + g2.entityID.to_s
puts "g3; " + g3.entityID.to_s
	
puts "g3.parent; " + g3.parent.entityID.to_s + ", " + g3.parent.class.name
puts "g3.parent.parent; " + g3.parent.parent.entityID.to_s + ", " 
      + g3.parent.parent.class.name
puts "g3.parent.parent.parent; " 
      + g3.parent.parent.parent.entityID.to_s + ", " 
      + g3.parent.parent.parent.class.name

And results in

model; Model
g1; 25
g2; 49
g3; 73
g3.parent; 40, Sketchup;;ComponentDefinition
g3.parent.parent; 3, Sketchup;;DefinitionList
g3.parent.parent.parent; Model, Sketchup;;Model

Now question:
Given g3, how can I get the owning/creating group g2 by code? g3.parent is not the right way.

[thomthom]

You can't traverse backwards like that.

Given an instance, that instance can appear many places in the model, if any of it's parent nodes have multiple instance. That makes it impossible to get a path from instance > model. The other way works, model > instance - when you traverse the model tree.

[kwalkerman]

... You can get some information regarding inheritance in one of two ways:

1. If the user is actively editing a group or component, you can get the current path using: Sketchup.active_model.active_path

2. If you are traversing through the model's entities, you can keep track of where you are in the model and develop your own inheritance structure that way.

[Cleverbeans]

I believe g3.parent.instances[0] gives you the correct group.

[TIG]

I repeat this from somewhere else...

<span class="syntaxdefault"></span><span class="syntaxkeyword">class&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Group<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxcomment">###&nbsp;Sometimes&nbsp;the&nbsp;group.entities.parent&nbsp;refer&nbsp;to&nbsp;the&nbsp;wrong&nbsp;definition.&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;###&nbsp;method&nbsp;checks&nbsp;for&nbsp;this&nbsp;and&nbsp;locates&nbsp;the&nbsp;correct&nbsp;parent&nbsp;definition.<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">if&nbsp;</span><span class="syntaxdefault">not&nbsp;Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Group</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">method_defined</span><span class="syntaxkeyword">?(;</span><span class="syntaxdefault">definition</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">def&nbsp;definition</span><span class="syntaxkeyword">()<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;</span><span class="syntaxdefault">self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">parent</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instances</span><span class="syntaxkeyword">.include?(</span><span class="syntaxdefault">self</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span class="syntaxdefault">self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">parent<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">else<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">definitions</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each&nbsp;</span><span class="syntaxkeyword">{&nbsp;|</span><span class="syntaxdefault">definition</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span class="syntaxdefault">definition&nbsp;</span><span class="syntaxkeyword">if&nbsp;</span><span class="syntaxdefault">definition</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instances</span><span class="syntaxkeyword">.include?(</span><span class="syntaxdefault">self</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">end<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">return&nbsp;</span><span class="syntaxdefault">nil&nbsp;</span><span class="syntaxcomment">###&nbsp;Should&nbsp;not&nbsp;happen.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">end<br />&nbsp;&nbsp;&nbsp;&nbsp;end</span><span class="syntaxcomment">#if<br /></span><span class="syntaxdefault">end</span><span class="syntaxcomment">#class&nbsp;Group&nbsp;</span><span class="syntaxdefault"></span>

Usage: defn = group.definition

[thomthom]

@cleverbeans said:

I believe g3.parent.instances[0] gives you the correct group.

Not if the group has instances, which it may have after copying a group and not editing it.