Parameters

newgroup

env

This method is responsible for copying and adding this group's child objects to the newgroup. By default, this simply calls newgroup.Add(env.Copy(obj)) for each child obj. However, your group subclass may want to keep track of some or all of the children for its own purposes. To that end you can override this method to do the copying manually, thereby correctly maintaining your subclass's internal pointers to children. You probably should not be calling GoObject's GoObject.CopyObject, but GoCopyDictionary's Copy or indexed lookup instead.

For example, a group holding an Icon, a Label, an InPort, and an OutPort might implement this method as follows:

            base.CopyChildren(newgroup, env);
            MyNode newnode = (MyNode)newgroup;
            newnode.myIcon = (GoObject)env[myIcon];
            newnode.myLabel = (GoText)env[myLabel];
            newnode.myInPort = (GoPort)env[myInPort];
            newnode.myOutPort = (GoPort)env[myOutPort];
            

Note that this indexing use of GoCopyDictionary can handle null references--it returns null.

Reference

GoGroup Class
GoGroup Members