fix path

QuickLook.Common/ExtensionMethods/DispatcherExtensions.cs

@@ -0,0 +1,47 @@
+// Copyright © 2017 Paddy Xu
+// 
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Threading.Tasks;
+using System.Windows.Threading;
+
+namespace QuickLook.Common.ExtensionMethods
+{
+    public static class DispatcherExtensions
+    {
+        public static void Delay(this Dispatcher disp, int delayMs,
+            Action<object> action, object parm = null)
+        {
+            Task.Delay(delayMs).ContinueWith(t => { disp.Invoke(action, parm); });
+        }
+
+        public static void DelayWithPriority(this Dispatcher disp, int delayMs,
+            Action<object> action, object parm = null,
+            DispatcherPriority priority = DispatcherPriority.ApplicationIdle)
+        {
+            Task.Delay(delayMs).ContinueWith(t => { disp.BeginInvoke(action, priority, parm); });
+        }
+
+        public static async Task DelayAsync(this Dispatcher disp, int delayMs,
+            Action<object> action, object parm = null,
+            DispatcherPriority priority = DispatcherPriority.ApplicationIdle)
+        {
+            await Task.Delay(delayMs);
+            await disp.BeginInvoke(action, priority, parm);
+        }
+    }
+}