How can EditorPlugin help this asset?

[mechPenSketch]

Previously, I added a plugin to change snap settings according to the TileMap's cell size, but I withdrew that feature as don't know how the snap settings are really stored, whether it's in the scene, or in the project. I think it has a few other features, but I've ended up removing the plugin, hoping to rebuild it from scratch one day.

But now, I need it to add features into the editor, including:

• Adding "Scene > New Game Map" on the editor's main menu.
• On the game map, add options to the toolbar for adding a new playing piece.

[mechPenSketch]

To add an option to the main menu, I must first access that main menu.

The main menu seems to be a HBoxContainer of MenuButtons.

Here is the final method:

get_editor_interface()

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As for making a new inherited scene, here is the closest I can get:

get_editor_interface().open_scene_from_path(PATH_NAME)

Is there then a way to make a new inherited scene out of it?

[mechPenSketch]

I think this is a bust. There are no function to create new scene, let alone inherited ones.

[mechPenSketch]

This is not the first time I've added a new button to the toolbar, so I have a head start at doing that.

At first, I wanted to see if it's possible to check whether a scene is inherited from another, particular scene. I remembered trying that once, but on the PackedScene, I don't know where to look to see where the inherits from.

But as I turns out, I don't really have to check for that. Instead, I could check whether the scene has that particular game map (extended from TileMap) as one of its nodes.