Thread by @OutoftheboxP

Here is how to create your own editor mode inside Unreal Engine.

Extend the editor with custom tools like the Landscape mode tailor to your own project.

A thread 🧵👇🏼

1/4 Create the EdMode subclass

The EdMode subclass is responsible for registering and initializing the mode. It provides access to crucial virtual functions such as UEdMode::Enter & UEdMode::Exit which are triggered selecting and leaving the edit mode.

2/4 Create the ModeToolkit subclass

The Toolkit is responsible for creating the UI panel. It allows you to fully customize the panel with custom widgets are leverage the built-in DetailsView panels.

3/4 Implementing the EdMode

In this example we will keep it simple and focus on 2 things:
- registering the editor mode inside the constructor: enables our custom mode to show up in the dropdown
- overriding the toolkit: gives up complete control over the mode's editor tab

4/4 Implementing the widget

In our custom toolkit, we will override the GetInlineContent. This enables use to override the default behavior (showing details about the mode + a details view) by creating a custom text widget.

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