...

Import/GacUI.cpp

@@ -25697,7 +25697,7 @@ GuiGeneralUndoRedoProcessor
 				{
 					steps.Clear();
 					firstFutureStep=0;
-					savedStep=-1;
+					savedStep=0;
 				}
 			}
 

TODO.md

@@ -67,9 +67,9 @@ https://zhuanlan.zhihu.com/p/33778843
 - [x] Demo: Direct2DClock
 - [x] Demo: Responsive1
 - [x] Demo: Responsive2
-- [ ] Demo: TextEditor
+- [x] Demo: TextEditor
   - [x] Use toolstrip group instead of splitter
-  - [ ] Recently opened files in both menu and toolbar
+  - [x] Recently opened files in both menu and toolbar
 - [x] Prevent from crashing while binding to a.b.c if a.b is null with a.b.cChanged exists
 - [ ] **Update Release**
 - [ ] Demo: TriplePhaseImageButton

Tutorial/GacUI_Controls/TextEditor/UI/Source/MainWindow.cpp

@@ -70,6 +70,7 @@ namespace demo
 			textBox->SetText(reader.ReadToEnd());
 			textBox->Select(TextPos(), TextPos());
 			textBox->SetFocus();
+			textBox->ClearUndoRedo();
 
 			fileName = dialogOpen->GetFileName();
 			if (INVLOC.EndsWith(fileName, L".xml", Locale::IgnoreCase))
@@ -81,8 +82,10 @@ namespace demo
 				SetupTextConfig();
 			}
 
-			textBox->ClearUndoRedo();
-			AddRecentFile(path);
+			GetApplication()->InvokeInMainThread(this, [=]()
+			{
+				AddRecentFile(path);
+			});
 			return true;
 		}
 		else
@@ -147,7 +150,11 @@ namespace demo
 			{
 				SetupTextConfig();
 			}
-			AddRecentFile(targetFileName);
+
+			GetApplication()->InvokeInMainThread(this, [=]()
+			{
+				AddRecentFile(targetFileName);
+			});
 			return true;
 		}
 		else