hurrmmm/godot/UI/TAS UI/RegressButton.cs

using Godot;
using System;

public partial class RegressButton : Button
{
	TAS_System TAS;
	bool isButtonPressed = false;

	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
		TAS = GetNode<TAS_System>("/root/TAS_System");
		this.Pressed += () => { 
			TAS.Regress(1);
		};

		this.ButtonDown += () => { this.isButtonPressed = true; TAS.StopIncrementingFrames(); };
		this.ButtonUp 	+= () => { this.isButtonPressed = false; };
	}

	public virtual void OnFrameIncremented(int newFrame)
    {
        this.Text = $"Current frame: {newFrame}";
    }

	// Called every frame. 'delta' is the elapsed time since the previous frame.
	public override void _Process(double delta)
	{
		if (TAS.CurrentFrame == 0)
		{
			this.Disabled = true;
			this.isButtonPressed = false;
		}
		else
		{
			this.Disabled = false;

			if (this.isButtonPressed)
			{
				TAS.Regress(1);
			}
		}
	}
}