Re: Question about proto_register_subtree_array

[Jaap Keuter <jaap.keuter () xs4all nl>]

Hi,

The array is used to track expanded/collapsed state of the subtree.

What you need to do is the following:

   proto_item item = proto_tree_add_item(tree, hf_my_tree, tvb, 0, -1, 
ENC_NA)
   proto_tree my_tree = proto_item_add_subtree(item, ett_my_tree);
   proto_item my_field = proto_tree_add_item(my_tree, hf_my_field, tvb, 
0, 1, ENC_NA);

This uses the 'item' (showing hf_my_tree) as anchor for the subtree 
'my_tree'.
To this subtree 'my_field' is added.

Given the hf_my_tree and hf_my_field are FT_BYTES, this shows something 
like this
(collapsed):

  + My tree: 010203040506

(expanded):

  - My tree: 010203040506
      Field: 01

Thanks,
Jaap

On 2011-12-06 12:48, Teto wrote:

> hi everybody,
>
> I've trouble understanding what's the role of
> proto_register_subtree_array. Each time I create a subtree, there is
> the same message appending on top of the subtree ("Energywise v2")
> and I wish it would remain blank. I create my subtrees like this:
> proto_item_add_subtree( uuid_item, ett_ew_uuid); for instance.
> In the function which registers the plugin, I've got that:
>
> gint *ett[] = {
>   &ett_ew_main_tree,
>   &ett_ew_header_tree,
>   &ett_energywise_tlv,
>   &ett_ew_uuid,
>   &ett_ew_list_of_answers
> };
>
> proto_energywise = proto_register_protocol("Energywise v2",
> "EnergyWise", "ew");
> proto_register_field_array(proto_energywise, hf, array_length(hf));
> proto_register_subtree_array(ett, array_length(ett));
>
> What's the aim of those tree identifiers ? Doxygen doc isn't clear 
> about
> them.
>
> Regards
> Matt

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