Using Control.reparent to an HBoxContainer does not rearrange the Control into the container

Help
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1

Godot Version

godot 4.3

Question

Hello. I’m following the “Slay the Spire clone” tutorial here (using Godot 4.3):

And got problem with the reparent() method not working in expected way.

Basically, an HBoxContainer is attached to a script hand.gd, which has a function _on_card_ui_reparent_requested. CardUI is a subclass the Control:

class_name Hand
extends HBoxContainer

func _ready() -> void:
    for child in get_children():
        var card_ui := child as CardUI
        card_ui.reparent_requested.connect(_on_card_ui_reparent_requested)

func _on_card_ui_reparent_requested(child: CardUI) -> void:
    print("hand got request reparent", child, self)
    child.reparent(self)
  1. The signal card_ui.reparent_requested is emitted when a game card object instance (card_ui) is dropped in non-target zone.
  2. The Hand._on_card_ui_reparent_requested should be called with the card object to be snapped back into the Hand container by calling child.reparent(self).
  3. I’ve checked _on_card_ui_reparent_requested is called with what seems to be the correct child and self. But the child was never reparent to the self (Hand).

How best to start debugging this?

2

Control.reparent() (or Node.reparent to be precise) on actually reparent if the parent was changed to another node.

In my case, a programming error on my part (i.e. I forgot to add certain node to scene group) stopped by dragging logic from reparent the CardUI to another node before reparent here. So when a signal triggers Hand._on_card_ui_reparent_requested(), the CardUI involved was always belong to the Hand, so there is no actual reparent needed.