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improve:PPT墨迹管理

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CJKmkp
2026-02-21 15:23:42 +08:00
parent b1e384e52d
commit b1513ca587
2 changed files with 35 additions and 79 deletions
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Ink Canvas/MainWindow_cs/MW_PPT.cs
+35 -47
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@@ -948,67 +948,55 @@ namespace Ink_Canvas
if (currentSlide == _previousSlideID) return;
lock (_slideSwitchLock)
{
if (currentSlide == _currentSlideShowPosition) return;
if (_isProcessingSlideSwitch) return;
_isProcessingSlideSwitch = true;
}
int prev = _currentSlideShowPosition;
int prev = _previousSlideID;
Application.Current.Dispatcher.Invoke(() =>
{
try
var ms = new MemoryStream();
inkCanvas.Strokes.Save(ms);
ms.Position = 0;
if (_memoryStreams.ContainsKey(prev))
_memoryStreams[prev]?.Dispose();
_memoryStreams[prev] = ms;
ClearStrokes(true);
timeMachine.ClearStrokeHistory();
_currentSlideShowPosition = currentSlide;
_singlePPTInkManager?.LockInkForSlide(currentSlide);
_pptUIManager?.UpdateCurrentSlideNumber(currentSlide, totalSlides);
if (_memoryStreams.ContainsKey(currentSlide) && _memoryStreams[currentSlide] != null)
{
if (inkCanvas.Strokes.Count > 0 && prev > 0 && prev != currentSlide)
byte[] bytes = _memoryStreams[currentSlide].ToArray();
int loadingPage = currentSlide;
Task.Run(() =>
{
var ms = new MemoryStream();
inkCanvas.Strokes.Save(ms);
ms.Position = 0;
if (_memoryStreams.ContainsKey(prev))
_memoryStreams[prev]?.Dispose();
_memoryStreams[prev] = ms;
}
ClearStrokes(true);
timeMachine.ClearStrokeHistory();
// 从内存流加载新页墨迹（无文件I/O）
try
{
if (_memoryStreams.ContainsKey(currentSlide) && _memoryStreams[currentSlide] != null)
try
{
_memoryStreams[currentSlide].Position = 0;
inkCanvas.Strokes.Add(new StrokeCollection(_memoryStreams[currentSlide]));
return new StrokeCollection(new MemoryStream(bytes));
}
}
catch (Exception ex)
catch (Exception ex)
{
LogHelper.WriteLogToFile($"从内存流加载第 {loadingPage} 页墨迹失败: {ex}", LogHelper.LogType.Warning);
return null;
}
}).ContinueWith(t =>
{
LogHelper.WriteLogToFile($"从内存流加载第 {currentSlide} 页墨迹失败: {ex}", LogHelper.LogType.Warning);
}
_singlePPTInkManager?.LockInkForSlide(currentSlide);
_pptUIManager?.UpdateCurrentSlideNumber(currentSlide, totalSlides);
}
finally
{
_currentSlideShowPosition = currentSlide;
_previousSlideID = currentSlide;
lock (_slideSwitchLock)
{
_isProcessingSlideSwitch = false;
}
if (t.IsFaulted || t.Result == null) return;
Application.Current.Dispatcher.Invoke(() =>
{
if (_currentSlideShowPosition != loadingPage) return;
inkCanvas.Strokes.Add(t.Result);
});
});
}
});
_previousSlideID = currentSlide;
}
catch (Exception ex)
{
LogHelper.WriteLogToFile($"处理幻灯片切换事件失败: {ex}", LogHelper.LogType.Error);
lock (_slideSwitchLock)
{
_isProcessingSlideSwitch = false;
}
}
}