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Node id calculation after removal ? [message #41884]

Mon, 03 February 2014 17:17

Runik
Messages: 5
Registered: February 2013
Location: France

Promising Member

Hello,

Is there a way to have node ids recalculated after a node removal ?
Currently the removed node stays in the treecontrol in an undefined state, and the following node ids in the hierarchy aren't modified, leading to parent id trouble when you save treecontrol data to a file and load it back ...

I suppose it's performance related, but is there a way to overcome this ?

Thanks Smile

Edit: maybe it'll be clearer with a little schema :

Original treecontrol :

root         // id=0
|-node1      // id=1, parent id=0
|  |-node1.1 // id=2, parent id=1
|-node2      // id=3, parent id=0
|  |-node2.2 // id=4, parent id=3

After removal of node1.1 :

root         // id=0
|-node1      // id=1, parent id=0
|-node2      // id=3, parent id=0
|  |-node2.2 // id=4, parent id=3

After saving to a file and reloading

root         // id=0
|-node1      // id=1, parent id=0
|-node2      // id=2, parent id=0
|  |-node2.2 // id=3, parent id=3 // ASSERT triggered !

[Updated on: Mon, 03 February 2014 17:25]

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Re: Node id calculation after removal ? [message #42034 is a reply to message #41884]

Wed, 12 February 2014 18:43

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

Well, no, after removing node, you should consider its id invalid.

In fact, you should not count on any properties of id other than that it is unique for TreeCtrl and valid since node creation till its removal. Nothing else is guaranteed.

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