powerfun-unity/Assets/Scripts/UI/Control/PFUIDropdown.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using UnityEngine.Events;

namespace Assets.Scripts.UI.Control
{
    public class PFUIDropdown : PFUIComponentBase
    {
        private int mSelectedIndex = 0;
        public int SelectedIndex
        {
            get
            {
                return this.mSelectedIndex;
            }
        }

        //public int Value
        //{
        //    get
        //    {
        //        return this.GetComponent<Dropdown>().value;
        //    }
        //    set
        //    {
        //        this.GetComponent<Dropdown>().value = value;
        //    }
        //}

        public string SelectedItem
        {
            get
            {
                if(this.mSelectedIndex >= 0)
                {
                    return this.GetComponent<Dropdown>().options[this.mSelectedIndex].text;
                }
                return null;
            }
        }

        private UnityAction<int> mOnValueChange;
        public UnityAction<int> OnValueChange
        {
            get
            {
                return mOnValueChange;
            }
            set
            {
                mOnValueChange = value;

            }
        }
        private Outline outline;
        void Awake()
        {
            //this.mSelectedIndex =             
            //UIManager.AddEvent(this.transform.GetComponent<Image>().gameObject, EventTriggerType.Select, new UnityEngine.Events.UnityAction<BaseEventData>(OnSelect));
            //UIManager.AddEvent(this.transform.GetComponent<Image>().gameObject, EventTriggerType.Deselect, new UnityEngine.Events.UnityAction<BaseEventData>(OnDeselect));

            this.GetComponent<Dropdown>().onValueChanged.AddListener(i => {
                mSelectedIndex = i;
                if (OnValueChange != null)
                {
                    mOnValueChange(i);
                }
                outline.enabled = false;
            });
            outline = transform.GetComponent<Outline>();
        }
        public void SetValidate() 
        {
            outline.enabled = true;
        }
        //public void SetValidate(string s)
        //{
        //    outline.gameObject.SetActive(true);
        //}
        public void OnSelect(BaseEventData eventData)
        {
            var image = this.transform.GetComponent<Image>();
            var png = Resources.Load<Sprite>("Images/ipt-1");
            image.sprite = png;
        }
        public void OnDeselect(BaseEventData eventData)
        {
            var image = this.transform.GetComponent<Image>();
            var png1 = Resources.Load<Sprite>("Images/ipt-0");
            image.sprite = png1;
        }


        public void AddOptions(List<Dropdown.OptionData> options)
        {
            this.GetComponent<Dropdown>().AddOptions(options);             
        }

        public void AddOptions(List<string> options)
        {
            this.GetComponent<Dropdown>().AddOptions(options);
        }

        public void ClearOptions()
        {
            this.GetComponent<Dropdown>().ClearOptions();            
        }
        

        public void SelectIndex(int index)
        {
            this.GetComponent<Dropdown>().value = index;
            this.mSelectedIndex = index;
        }

        public void SelectValue(string value)
        {
            var options = this.GetComponent<Dropdown>().options;
            for (int i = 0; i < options.Count; i++)
            {
                if(options[i].text == value)
                {
                    SelectIndex(i);
                    return;
                }
            }
        }
    }
}