FairyGUIEditor.EditorToolSet.LoadPackages C# (CSharp) Method

        public static void LoadPackages()
        {
            if (Application.isPlaying || _loaded)
                return;

            #if !UNITY_5
            EditorApplication.update -= EditorApplication_Update;
            EditorApplication.update += EditorApplication_Update;
            #endif
            _loaded = true;

            UIPackage.RemoveAllPackages();
            FontManager.Clear();
            NTexture.DisposeEmpty();

            string[] ids = AssetDatabase.FindAssets("@sprites t:textAsset");
            int cnt = ids.Length;
            for (int i = 0; i < cnt; i++)
            {
                string assetPath = AssetDatabase.GUIDToAssetPath(ids[i]);
                int pos = assetPath.LastIndexOf("@");
                if (pos == -1)
                    continue;

                assetPath = assetPath.Substring(0, pos);
                if (AssetDatabase.AssetPathToGUID(assetPath) != null)
                    UIPackage.AddPackage(assetPath,
                        (string name, string extension, System.Type type) =>
                        {
                            return AssetDatabase.LoadAssetAtPath(name + extension, type);
                        }
                    );
            }

            List<UIPackage> pkgs = UIPackage.GetPackages();
            pkgs.Sort(CompareUIPackage);

            cnt = pkgs.Count;
            packagesPopupContents = new GUIContent[cnt + 1];
            for (int i = 0; i < cnt; i++)
                packagesPopupContents[i] = new GUIContent(pkgs[i].name);
            packagesPopupContents[cnt] = new GUIContent("Please Select");

            UIConfig.ClearResourceRefs();
            UIConfig[] configs = GameObject.FindObjectsOfType<UIConfig>();
            foreach (UIConfig config in configs)
                config.Load();

            EMRenderSupport.Reload();
        }

        void OnGUI()
        {
            if (itemStyle == null)
            {
                itemStyle = new GUIStyle(GUI.skin.GetStyle("IN Toggle"));
                itemStyle.normal.background    = null;
                itemStyle.onNormal.background  = GUI.skin.GetStyle("ObjectPickerResultsEven").active.background;
                itemStyle.focused.background   = null;
                itemStyle.onFocused.background = null;
                itemStyle.hover.background     = null;
                itemStyle.onHover.background   = null;
                itemStyle.active.background    = null;
                itemStyle.onActive.background  = null;
                itemStyle.margin.top           = 0;
                itemStyle.margin.bottom        = 0;
            }

            EditorGUILayout.BeginHorizontal();

            //package list start------
            EditorGUILayout.BeginHorizontal();
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical();
            GUILayout.Space(10);
            EditorGUILayout.LabelField("Packages", (GUIStyle)"OL Title", GUILayout.Width(300));

            EditorGUILayout.BeginHorizontal();
            GUILayout.Space(4);

            scrollPos1 = EditorGUILayout.BeginScrollView(scrollPos1, (GUIStyle)"CN Box", GUILayout.Height(300), GUILayout.Width(300));
            EditorToolSet.LoadPackages();
            List <UIPackage> pkgs = UIPackage.GetPackages();
            int cnt = pkgs.Count;

            if (cnt == 0)
            {
                selectedPackage     = -1;
                selectedPackageName = null;
            }
            else
            {
                for (int i = 0; i < cnt; i++)
                {
                    EditorGUILayout.BeginHorizontal();
                    GUILayout.Space(4);
                    if (GUILayout.Toggle(selectedPackageName == pkgs[i].name, pkgs[i].name, itemStyle, GUILayout.ExpandWidth(true)))
                    {
                        selectedPackage     = i;
                        selectedPackageName = pkgs[i].name;
                    }
                    EditorGUILayout.EndHorizontal();
                }
            }
            EditorGUILayout.EndScrollView();

            EditorGUILayout.EndHorizontal();

            EditorGUILayout.EndVertical();

            EditorGUILayout.EndHorizontal();

            //package list end------

            //component list start------

            EditorGUILayout.BeginHorizontal();
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical();
            GUILayout.Space(10);
            EditorGUILayout.LabelField("Components", (GUIStyle)"OL Title", GUILayout.Width(220));

            EditorGUILayout.BeginHorizontal();
            GUILayout.Space(4);

            scrollPos2 = EditorGUILayout.BeginScrollView(scrollPos2, (GUIStyle)"CN Box", GUILayout.Height(300), GUILayout.Width(220));
            if (selectedPackage >= 0)
            {
                List <PackageItem> items = pkgs[selectedPackage].GetItems();
                int i = 0;
                foreach (PackageItem pi in items)
                {
                    if (pi.type == PackageItemType.Component && pi.exported)
                    {
                        EditorGUILayout.BeginHorizontal();
                        GUILayout.Space(4);
                        if (GUILayout.Toggle(selectedComponentName == pi.name, pi.name, itemStyle, GUILayout.ExpandWidth(true)))
                        {
                            selectedComponentName = pi.name;
                        }
                        i++;
                        EditorGUILayout.EndHorizontal();
                    }
                }
            }
            EditorGUILayout.EndScrollView();

            EditorGUILayout.EndHorizontal();

            EditorGUILayout.EndVertical();

            EditorGUILayout.EndHorizontal();

            //component list end------

            GUILayout.Space(10);

            EditorGUILayout.EndHorizontal();

            GUILayout.Space(20);

            //buttons start---
            EditorGUILayout.BeginHorizontal();

            GUILayout.Space(210);

            if (GUILayout.Button("Cancel", GUILayout.Width(100)))
            {
                this.Close();
            }

            GUILayout.Space(20);
            if (GUILayout.Button("OK", GUILayout.Width(100)) && selectedPackage >= 0)
            {
                UIPackage selectedPkg = pkgs[selectedPackage];
                string    tmp         = selectedPkg.assetPath.ToLower();
                string    packagePath;
                int       pos = tmp.LastIndexOf("resources/");
                if (pos != -1)
                {
                    packagePath = selectedPkg.assetPath.Substring(pos + 10);
                }
                else
                {
                    packagePath = null;
                }
                bool isPrefab = PrefabUtility.GetPrefabType(Selection.activeGameObject) == PrefabType.Prefab;

                Selection.activeGameObject.SendMessage("OnUpdateSource",
                                                       new object[] { selectedPkg.name, packagePath, selectedComponentName, !isPrefab },
                                                       SendMessageOptions.DontRequireReceiver);
#if UNITY_5_3_OR_NEWER
                EditorSceneManager.MarkSceneDirty(EditorSceneManager.GetActiveScene());
#elif UNITY_5
                EditorApplication.MarkSceneDirty();
#else
                EditorUtility.SetDirty(Selection.activeGameObject);
#endif
                this.Close();
            }

            EditorGUILayout.EndHorizontal();
        }