using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
/********************************************************************************
*Create By CG
*Function 点击Tap切换文本输入框
*********************************************************************************/
namespace CG.UTility
{
    
    public class InputFieldController : MonoBehaviour, ISelectHandler, IDeselectHandler
    {
        private bool isSelect = false;
        private EventSystem system;
        // Use this for initialization
        void Start()
        {
            system = EventSystem.current;
        }
        private void GetTabDown()
        {
            if (Input.GetKeyDown(KeyCode.Tab) && isSelect)
            {
                //下一个要切换到的
                Selectable next = null;
                //现在正处在能够处理事件的
                Selectable now = system.currentSelectedGameObject.GetComponent<Selectable>();
                //找到现在的下一个
                next = now.FindSelectableOnDown();
                if (next == null)
                {
                    print("没有下一个了");
                }
                //让下一个能够处理事件
                system.SetSelectedGameObject(next.gameObject);
            }
        }
        // Update is called once per frame
        void Update()
        {
            GetTabDown();
        }
        /// <summary>
        /// 实现ISelectHandler接口
        /// </summary>
        /// <param name="eventData"></param>
        public void OnSelect(BaseEventData eventData)
        {
            isSelect = true;
        }
        /// <summary>
        /// 实现IDeselectHandler接口
        /// </summary>
        /// <param name="eventData"></param>
        public void OnDeselect(BaseEventData eventData)
        {
            isSelect = false;
        }
    }
}