增加文件夹路径编辑器

SpineViewer/UITypeEditor.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing.Design;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms.Design;
+
+namespace SpineViewer
+{
+    /// <summary>
+    /// 使用 FolderBrowserDialog 的文件夹路径编辑器
+    /// </summary>
+    public class FolderNameEditor : UITypeEditor
+    {
+        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext? context)
+        {
+            // 指定编辑风格为 Modal 对话框, 提供右边用来点击的按钮
+            return UITypeEditorEditStyle.Modal;
+        }
+
+        public override object? EditValue(ITypeDescriptorContext? context, IServiceProvider provider, object? value)
+        {
+            // 重写 EditValue 方法，提供自定义的文件夹选择对话框逻辑
+            using var dialog = new FolderBrowserDialog();
+
+            // 如果当前值为有效路径，则设置为初始选中路径
+            if (value is string currentPath && Directory.Exists(currentPath))
+                dialog.SelectedPath = currentPath;
+
+            if (dialog.ShowDialog() == DialogResult.OK)
+                value = dialog.SelectedPath;
+
+            return value;
+        }
+    }
+}