From 11bf8cffb2ce7c92b928b4ccaae229d1bbc2e140 Mon Sep 17 00:00:00 2001
From: CJK_mkp <113243675+CJKmkp@users.noreply.github.com>
Date: Sat, 8 Nov 2025 19:55:10 +0800
Subject: [PATCH] =?UTF-8?q?improve:PPT=E5=A2=A8=E8=BF=B9=E5=8A=A0=E8=BD=BD?=
MIME-Version: 1.0
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---
 Ink Canvas/MainWindow_cs/MW_PPT.cs | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/Ink Canvas/MainWindow_cs/MW_PPT.cs b/Ink Canvas/MainWindow_cs/MW_PPT.cs
index 48435399..d542b616 100644
--- a/Ink Canvas/MainWindow_cs/MW_PPT.cs	
+++ b/Ink Canvas/MainWindow_cs/MW_PPT.cs	
@@ -1145,6 +1145,9 @@ namespace Ink_Canvas
         {
             try
             {
+                ClearStrokes(true);
+                timeMachine.ClearStrokeHistory();
+
                 StrokeCollection strokes = null;
                 if (Settings.PowerPointSettings.IsSupportWPS)
                 {
@@ -1155,9 +1158,8 @@ namespace Ink_Canvas
                     strokes = _multiPPTInkManager?.LoadSlideStrokes(slideIndex);
                 }
 
-                if (strokes != null)
+                if (strokes != null && strokes.Count > 0)
                 {
-                    inkCanvas.Strokes.Clear();
                     inkCanvas.Strokes.Add(strokes);
                 }
             }
@@ -1288,7 +1290,6 @@ namespace Ink_Canvas
                 // 获取当前页面索引
                 var currentSlideIndex = _pptManager?.GetCurrentSlideNumber() ?? 0;
 
-
                 // 验证页面索引的有效性
                 if (newSlideIndex <= 0)
                 {
@@ -1321,10 +1322,9 @@ namespace Ink_Canvas
                         }
                     }
                 }
-                else if (inkCanvas.Strokes.Count > 0 && currentSlideIndex <= 0)
-                {
-                }
 
+                ClearStrokes(true);
+                timeMachine.ClearStrokeHistory();
                 StrokeCollection newStrokes = null;
                 if (Settings.PowerPointSettings.IsSupportWPS)
                 {
@@ -1334,9 +1334,9 @@ namespace Ink_Canvas
                 {
                     newStrokes = _multiPPTInkManager?.SwitchToSlide(newSlideIndex, null);
                 }
-                if (newStrokes != null)
+                
+                if (newStrokes != null && newStrokes.Count > 0)
                 {
-                    inkCanvas.Strokes.Clear();
                     inkCanvas.Strokes.Add(newStrokes);
                 }