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Home » Developing U++ » U++ Developers corner » Proposed change to U++ to allow owning children.
Re: revised ownership change [message #32170 is a reply to message #32169] Thu, 28 April 2011 23:31 Go to previous messageGo to previous message
Lance is currently offline  Lance
Messages: 527
Registered: March 2007
Contributor
In either case 1 or 2, a CreatedOwned child can change parent like any other stack Ctrl without losing track. So this is not a concern. Or, change parent is perfectly defined behavior for either type of children.

If we go with Case 2, CreateOwned+Detach, a detached child should never be reattached to a parent [by calling AddChild(...) etc]. It's a final decision, you detach it, you destruct it. However, Derived class can reattach by way of protected member function.

This is a virtually zero cost, safe, and consistent solution as far as I can see.

Regarding the hole when copying/picking(yes, picking also requires reset the owned flag), we can tinker the Ctrl pick constructor a little bit to fix it.
 
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