整理一下项目文件

AIStudio.Wpf.DiagramDesigner/Helpers/DesignerHelper.cs

@@ -0,0 +1,45 @@
+using System.ComponentModel;
+using System.Threading;
+using System.Windows;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class DesignerHelper
+    {
+        private static bool? _isInDesignMode;
+
+        public static bool IsInDesignMode
+        {
+            get
+            {
+                if (!_isInDesignMode.HasValue)
+                {
+                    _isInDesignMode = (bool)DependencyPropertyDescriptor.FromProperty(DesignerProperties.IsInDesignModeProperty, typeof(FrameworkElement)).Metadata.DefaultValue;
+                }
+                return _isInDesignMode.Value;
+            }
+        }
+
+        #region IsInMainThread
+
+        /// <summary>
+        /// 是否是在主线程中处理
+        /// </summary>
+        public static bool IsInMainThread
+        {
+            get
+            {
+                if (Thread.CurrentThread.IsBackground || Thread.CurrentThread.IsThreadPoolThread) return false;
+
+                if (Thread.CurrentThread.Name == "主线程") return true;
+
+                if (Application.Current == null)
+                    return true;
+
+                return Thread.CurrentThread == Application.Current.Dispatcher.Thread;
+            }
+        }
+
+        #endregion
+    }
+}