ButtonInfo.cs

using UnityEngine;
using UnityEngine.EventSystems;
using System.Collections;
using System.Collections.Generic;

namespace UI {

    public enum ButtonType
    {
        Left,
        Right,
        Middle,
        Trigger
    }

    public class ButtonInfo {

        public Dictionary<ButtonType, PointerEventData.FramePressState> buttonStates = new Dictionary<ButtonType, PointerEventData.FramePressState>();


        public ButtonInfo()
        {
            // Set all buttons to "Not changed" per default:
            buttonStates[ButtonType.Left] = PointerEventData.FramePressState.NotChanged;
            buttonStates[ButtonType.Right] = PointerEventData.FramePressState.NotChanged;
            buttonStates[ButtonType.Middle] = PointerEventData.FramePressState.NotChanged;
            buttonStates[ButtonType.Trigger] = PointerEventData.FramePressState.NotChanged;
        }
    }
}