Inherit Both Scene and Script Option

[11clock]

I think that creating an inherited scene should include the option to automatically create a script that inherits the original scene’s root script. This would remove the step that involves clearing the new inherited scene’s root script and attaching a new script that inherits the other, as this would be a part of creating an inherited scene.

[PLyczkowski]

I think this is a very good suggestion, and I suspect this would limit the 'multiscript'/'built-in script/linking scenes with classes' issues that often pop up (#8502 #21187 #17418 #10951 #17093 #6067).

I think the cause of these kind of problems is the inability to easily 'derive things from base things' - in Godot's terms meaning inherit both the scene contents and the scene script. Think creating a unique_effect that will have it's script built in (because will appear in only one place) and that is derivative of base effect.gd.

This can be done in Godot of course, but it's a bit non-intuitive and cumbersome and doesn't really feel like straight up deriving: one has to first add a base_effect subscene (or create an inherited scene), then remove the subscene's script, then create a new script, in the Inherits field click the folder icon, and then navigate to the base_effect's script (or write extends "res... by hand).

Adding one click deriving would alleviate those issues in some part I think. The workflow would look like this:

• Press +
• Choose Effect
• Instead of Create Instance, choose Create Inherited
• When the script effect is not saved to disk but built-in, a window popup appears that it can't be done unless you save script to disk, and offers a one-click option to do so
• A node is added to the scene tree with the base type effect.gd has, with a built-in script "extends "res://effect.gd""

This can also be combined with #22181. The workflow would then look like this:

• Press +
• Choose BaseEnemy (base_enemy.tscn)
• Instead of Create Instance, choose Create Inherited
• When the script effect is not saved to disk but built-in, a window popup appears that it can't be done unless you save script to disk, and offers a one-click option to do so
• A scene is added to the scene tree, with a built-in script "extends "res://base_enemy.gd""

If you don't want to add Inherited, but convert an existing instance to inherited:

• RMB on node in scene tree that has script A attached
• Choose Convert to Inherited
• When the script effect is not saved to disk but built-in, a window popup appears that it can't be done unless you save script to disk, and offers a one-click option to do so
• The script is converted to a new built-in script that extends script A
  (Similar functionality can be found in this add-on https://github.com/kubecz3k/KivanoEditorEnhancemens )

[willnationsdev]

11clock: This would remove the step that involves clearing the new inherited scene’s root script and attaching a new script that inherits the other, as this would be a part of creating an inherited scene.

PLyczkowski: This can be done in Godot of course, but it's a bit non-intuitive and cumbersome and doesn't really feel like straight up deriving: one has to first add a base_effect subscene (or create an inherited scene), then remove the subscene's script, then create a new script, in the Inherits field click the folder icon, and then navigate to the base_effect's script (or write extends "res... by hand).

All of these features, are more or less already available via #22181. It's already impossible to extend from a built-in script sub-resource within a scene, so IF the root node of your scene had a built-in script, you'd have to save the script to a file first.

The recent script class features made changes to the editor such that the add-script button DOESN'T go away when you click on a node with a script. Instead, clicking the button will open the ScriptCreateDialog as before, but the dialog will automatically be deriving the existing script (either by path or, if it's a script class, by name).

What this means for the scene templates is...

1. If you create a scene with a non-built-in script...
2. and that scene is registered as a scene template...
3. and if you then instance that scene template in your scene, the scene's root node will have that script.
4. If you then want to DERIVE that script, you CAN by just clicking the instanced scene and clicking the add script button.
5. The base script's path or name will be listed in the Inherits field. Everything will work as expected.

[PLyczkowski]

1. If you create a scene with a non-built-in script...

2. and that scene is registered as a scene template...
   3, and if you then instance that scene template in your scene, the scene's root node will have that script.

3. If you then want to DERIVE that script, you CAN by just clicking the instanced scene and clicking the add script button.

4. The base script's path or name will be listed in the Inherits field. Everything will work as expected.

That's sounds good enough, can't wait for merge then!

I guess the only thing that's left is a different icon for the add script button when there is a script present already?

[willnationsdev]

@PLyczkowski Yeah, that's what people have requested. I'm not sure who actually does all that though (I'm no graphic artist really).

[PLyczkowski]

I am, in case one is needed for this.

[willnationsdev]

@PLyczkowski Yeah, if you wanna figure out what the right workflow for that is and add an icon, go right ahead! I know it has to do with using the godot-design repository, making a .svg, optimizing it with a script they have, and then merging it into the repository. I created an icon there, but I'm not sure how that all fits into the actual editor. It's all very confusing.

You'd have to update editor to change the icon in response to the node having a script already or not though. Either that, or refactor it so that there are multiple buttons entirely and re-hook up the signal connection for the new button.

[PLyczkowski]

Here's mine:

[willnationsdev]

That looks good to me! :-)

[PLyczkowski]

Here you go then: https://drive.google.com/file/d/1Fo9-BvSkLtt6XVZcJaIDaXeRf3op_wIk/view?usp=sharing

[Calinou]

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