Tree node should have select()/deselect() functions

[LikeLakers2]

I feel like this one is self-explanatory. My reasoning for this is that using TreeItem.selected doesn't update the Tree's get_selected() result, which turned into me having to make my own selected_item variable just so I could make it null whenever I don't have an item selected.

On that note, it would also be useful to allow deselecting all TreeItems whenever whitespace is clicked. It's not that hard to deselect all in GDscript, but I feel it'd be welcome as an option.

[AlexHolly]

get_select() is not updated in Tree.SELECT_MULTI mode.

https://github.com/godotengine/godot/blob/master/scene/gui/tree.cpp#L3077
selected_item = p_item;

[LikeLakers2]

@AlexHolly Did you mean to make a new issue? This is a feature proposal, not a bug report; I don't think bugs should be reported on a feature proposal.

[AlexHolly]

I feel like this one is self-explanatory. My reasoning for this is that using TreeItem.selected doesn't update the Tree's get_selected() result, which turned into me having to make my own..

Do you think it should be updated? I would make a PR and fix both.

[LikeLakers2]

@AlexHolly If you'd like to try, go for it. I'd be up for it.

Also, I see your reasoning now for the bug report being here, instead of in its own issue -- my bad!

[Eoin-ONeill-Yokai]

Is there something I'm missing here?

I have a situation where my Tree might need to be reconstructed. In that situation, I would like to be able to modify the selected item, but that seems to be impossible to do via GDScript. So is there no way at all to change the visually selected item through GDScript alone?

[radlotus]

Yeah. It seems to be impossible to select a TreeItem via GDScript. Is it because the Editor doesn't use such feature? It would be very convenient actually.

[marzecdawid]

@radlotus It look like methods TreeItem:Select() and TreeItem:Deselect() are exposed in GDScript for many years:
https://docs.godotengine.org/en/stable/classes/class_treeitem.html#class-treeitem-method-select

Can you clarify if this is the functionality you were looking for?

[egiezen]

The method Tree.deselect_all() doesn't deselect the root TreeItem (Godot 4 Beta 12).