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revised ownership change [message #32161 is a reply to message #32160]

Thu, 28 April 2011 18:28

kohait00 is currently offline

kohait00
Messages: 939
Registered: July 2009
Location: Germany

Experienced Contributor

hi Lance

i've gone though the code and based on your work redid it.
current state is attached.

the scenarios are basicly theese:

1) normal scenario (current upp)
Ctrls are added to arbitrary context to be displayed, ownership context is maintained somewhere else. -> 2 different contexts, perfect control over whats happening. for complex environment.

2) ownership scenario (additional)
heap created controls can be added to other controls that will maintain their lifetime together with their visual context. means, when an owned Ctrl is removed from its owning parent, the parent is taking care of destruction. so both contexts, visual and ownership are bound. fits well for dynamic environment with reduced Ctrl API usage (GetData/SetData, WhenAction, etc)

features

* traditional upp way still default
* ownership adding (AddOwned, Detach) is only interface for dealing with ownership (similar to containers)
* auto transfer of ownership supported when an owned Ctrl is added to another parent.
* least intrusive code
* drawback: owned controls may not call Remove(), since their parent will try to delete them. ASSERT placed. arguable.. use Detach for that.. or specify implicit Detach with Remove?

changes to your version:

* removed template creators, not needed for ownership management.
* code cleanup and simplification
* redefined public interface for ownership (mainly: no public Owned(bool b true) method, veeery dangerous)
* some ASSERTS placed to ensure proper behaviour and early fault catch
* delete only in one place.. avoids some conrercases when context switching.

take a look..
maybe mirek will be really considering it. at least look at it Smile

Smile

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[Message index]

		Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 17:18
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Wed, 16 March 2011 17:26
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 17:29
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 17:30
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 17:39
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Wed, 16 March 2011 18:01
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 18:10
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 18:29
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 18:35
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 18:43
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 16 March 2011 19:24
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 02:13
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Fri, 18 March 2011 11:01
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 14:39
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 15:21
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 15:40
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 16:22
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 16:34
		Re: Proposed change to U++ to allow owning children. By: mirek on Fri, 18 March 2011 19:35
		Re: Proposed change to U++ to allow owning children. By: mirek on Fri, 18 March 2011 19:32
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 23:02
		Re: Proposed change to U++ to allow owning children. By: mirek on Fri, 18 March 2011 23:18
		Re: Proposed change to U++ to allow owning children. By: Lance on Fri, 18 March 2011 23:34
		Re: Proposed change to U++ to allow owning children. By: mirek on Fri, 18 March 2011 23:40
		Re: Proposed change to U++ to allow owning children. By: Lance on Sat, 19 March 2011 00:02
		Re: Proposed change to U++ to allow owning children. By: mirek on Sat, 19 March 2011 00:37
		Re: Proposed change to U++ to allow owning children. By: Lance on Sat, 19 March 2011 01:30
		Re: Proposed change to U++ to allow owning children. By: Lance on Sat, 19 March 2011 01:35
		Re: Proposed change to U++ to allow owning children. By: mirek on Sat, 19 March 2011 10:59
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Sun, 20 March 2011 10:32
		Re: Proposed change to U++ to allow owning children. By: Lance on Sun, 20 March 2011 14:07
		Re: Proposed change to U++ to allow owning children. By: Lance on Sun, 20 March 2011 14:11
		Re: Proposed change to U++ to allow owning children. By: Lance on Sun, 20 March 2011 14:28
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Fri, 25 March 2011 13:26
		Re: Proposed change to U++ to allow owning children. By: Lance on Sun, 27 March 2011 15:33
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Sun, 17 April 2011 17:25
		Re: Proposed change to U++ to allow owning children. By: Lance on Tue, 19 April 2011 06:00
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Tue, 19 April 2011 09:14
		Re: Proposed change to U++ to allow owning children. By: Lance on Tue, 19 April 2011 14:09
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Tue, 19 April 2011 18:05
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 20 April 2011 02:44
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Wed, 20 April 2011 08:51
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 20 April 2011 19:24
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 20 April 2011 21:17
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 20 April 2011 21:23
		Re: Proposed change to U++ to allow owning children. By: Lance on Wed, 20 April 2011 21:38
		Re: Proposed change to U++ to allow owning children. By: kohait00 on Thu, 28 April 2011 16:32
		revised ownership change By: kohait00 on Thu, 28 April 2011 18:28
		Re: revised ownership change By: Lance on Thu, 28 April 2011 21:45
		Re: revised ownership change By: kohait00 on Thu, 28 April 2011 21:57
		Re: revised ownership change By: Lance on Thu, 28 April 2011 23:18
		Re: revised ownership change By: Lance on Thu, 28 April 2011 23:31
		Re: revised ownership change By: Lance on Thu, 28 April 2011 23:54
		Re: revised ownership change By: kohait00 on Sun, 22 May 2011 21:58
		Re: revised ownership change By: Mindtraveller on Mon, 23 May 2011 00:28
		Re: revised ownership change By: kohait00 on Mon, 23 May 2011 11:16
		Re: revised ownership change By: Lance on Mon, 06 June 2011 05:11
		Re: revised ownership change By: Lance on Mon, 06 June 2011 05:05

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