Tree insertion in 1.7.1

steve64

It seems that the nodes are inserted in wrandom order in the ui.Tree object available in LuaRT 1.7.1 when the structure is passed to the constructor.
The order is preserved, instead, by adding nodes with the :add() method.
Also, it is not clear the purpose of the 'index' property of Treeitems. It does not look a unique id inside the entire ui.Tree object. Is this the supposed purpose? If not, how can I add (invisible) custom info to the nodes?

Samir

steve64
Nodes should be inserted in the order of strings in the constructor. I will check this.

The TreeItem.index property is the node visual position from the first TreeItem until the last one. It's not a unique ID.

You cannot add custom info to TreeItems as their are dynamic objects. What you can do is to use a table to keep the TreeItems custom data by using the index as table index. But the Tree should not be modified as it can impact the TreeItem.id value

Samir

steve64 It seems that the nodes are inserted in wrandom order in the ui.Tree object available in LuaRT 1.7.1 when the structure is passed to the constructor.

This has been already discussed. It's due to the way Lua use tables internally (which use integer keys or hash keys). Iterating over a mixed table will iterate first with integer keys, then hash keys.

If you want to declare tables with subitems during Tree construction and have the order preserved, your only option is to use the Tree:add() method

steve64

What do you mean by "TreeItem.id"? Is it the raw table reference?

Samir

I meant TreeItem.index sorry

steve64

Samir but this index is not unique in the entire Tree object…

Samir

It is unique if you don't change any of the previous TreeItems (deleteing or inserting new TreeItems)