what happened when selecting an item in WorldEditor/Creator/Static shape

I am learning TGE now.One problem confused me for a long time ,which is how to create a static shape in front the camera just like Creator does when selecting an item in the treeview. I digged into the source codes of the mission editor and got some clue.

Below is what I found:

in

function Creator::init( %this )

there are codes :

%create = "TSStatic::create(\"" @ %file @ "\");";
      %this.insertItem( %parentId, fileBase( %file ), %create,"TSStatic" );

in the onSelect callback fuction

function Creator::onInspect(%this,%obj)
{
   if(!$missionRunning)
      return;
   
  %objId = eval(%this.getItemValue(%obj));

   // drop it from the editor - only SceneObjects can be selected...   
   Creator.removeSelection(%obj);
   
   EditorTree.clearSelection();
   EWorldEditor.clearSelection();
   EWorldEditor.selectObject(%objId);
   EWorldEditor.dropSelection();
}

in the obove callback function ,it calles TSStatic::create ,which is defined as this

function TSStatic::create(%shapeName)
{
   %obj = new TSStatic() 
   {
      shapeName = %shapeName;
   };
  return(%obj);
}

those are all for creating static shape,but I can't see how it does to put the shap just in front of the screen(the observer).