MenuPresenter

MenuPresenter.cs

using UnityEngine;
using UnityEngine.UI;
using UniRx;
using UniLinq;
using System.IO;
using System.Collections;
using System.Collections.Generic;

namespace Viewer
{
    public class MenuPresenter : MonoBehaviour
    {

        Dropdown fileDropDown;
        InputField directoryInput;
        Dictionary<string, string> fileDictionary;
        List<Dropdown.OptionData> defaultOption;

        void Start ()
        {
            fileDropDown = GameObject.Find ("FileDropdown").GetComponent<Dropdown> ();
            defaultOption = fileDropDown.options;
            
            // DropDownを監視
            fileDropDown.ObserveEveryValueChanged (_ => _.value)
                .Subscribe (index => {
                var value = fileDropDown.options [index].text;
                StartCoroutine (LoadFbx (value));
            });
            
            directoryInput = GameObject.Find ("DirectoryInput").GetComponent<InputField> ();
            
            // InputFieldを監視
            directoryInput.OnEndEditAsObservable ().Subscribe (UpdateDropDown);
        }

        void UpdateDropDown (string dir)
        {
            fileDictionary = new Dictionary<string, string> ();
            if (!Directory.Exists (dir)) {
                fileDropDown.options = defaultOption;
                return;
            }
            
            Directory.GetFiles (dir)
                .Where (path => path.ToLower ().EndsWith (".fbx"))
                .ToList ()
                .ForEach (path => fileDictionary.Add (Path.GetFileName (path), path));
            fileDropDown.options = ConvertArrayToOptions (fileDictionary.Keys.ToArray ());
        }

        List<Dropdown.OptionData> ConvertArrayToOptions (string[] files)
        {
            var list = files.Select (path => {
                var data = new Dropdown.OptionData ();
                data.text = path;
                return data;
            }).ToList ();
            list.Insert (0, defaultOption [0]);
            return list;
        }

        IEnumerator LoadFbx (string path)
        {
            if (fileDictionary == null || !fileDictionary.ContainsKey (path)) {
                yield break;
                
            }
            Debug.Log ("未実装だよ！");
        }
    }
}