Custom nodes don't have their parents' icon

[denis-efimov]

Tested versions

• Reproducible in v4.2.1.stable.official [b09f793]

System information

Windows 11 - Godot v4.2.1.stable

Issue description

Custom nodes made in C++ have the node's icon instead of the parent's node icon.

According to the documentation when a new class is created and exposed to scripting, the editor's interface will display it with a default icon representing the base class it inherits from. This seems to be not the case.

Example of C++ code:

using BasePanelContainer = godot::PanelContainer;

class ChartPanel: public BasePanelContainer
{
    GDCLASS(ChartPanel, BasePanelContainer)

The icon in the editor is wrong either in the "create new node" window or in the "scene tree":

Steps to reproduce

• Create a C++ class inherited from godot::PanelContainer
• Add the created node in a scene

Minimal reproduction project (MRP)

N/A

[sylbeth]

Would this help ease the problem? #100298

[sylbeth]

Another two ways to solve this problem I can think of are:

• Each Node in the engine adds a function to be inherited by the GDExtension classes that returns their name, thus, it would only be a matter of calling that function to retrieve the name of the base class.
• The GDExtension provides Godot with pairings of Custom Node and builtin node it inherits from (or, at least, node outside of the GDExtension). That would also make the check trivial.