执行inkCanvas1.Strokes.Erase之后，WPF-InkCanvas撤消操作

问题描述

我有下面的代码

private void inkCanvas1_OnTouchMove(object sender,TouchEventArgs touchEventArgs)
{
    StylusShape EraseShape = (StylusShape)new RectangleStylusShape(20,20,0);
    List<Point> enumrator = new List<Point>();
    TouchPoint touchPoint = touchEventArgs.GetTouchPoint(this);

    enumrator.Add(new Point(touchPoint.Position.X,touchPoint.Position.Y));
    inkCanvas1.strokes.Erase(enumrator,EraseShape);//**reverse operation of this statement**
}

，我想在执行撤消操作后将擦除的笔划向后撤消。

我已经尝试了以下事件代码。但是当我擦除多个笔划时，此逻辑效果不佳。

System.Windows.Ink.strokeCollection addedstrokes;
System.Windows.Ink.strokeCollection removedstrokes;
bool undoRedoInProcess = false;

private void strokes_strokesChanged(object sender,System.Windows.Ink.strokeCollectionChangedEventArgs e)
{
    if (undoRedoInProcess)
    {
       addedstrokes = e.Added;
       removedstrokes = e.Removed;
    }       
}


private void Undo()
{
    undoRedoInProcess = true;
    inkCanvas1.strokes.Remove(removedstrokes);
    inkCanvas1.strokes.Add(addedstrokes);
    undoRedoInProcess = false;
}
private void Redo()
{
    undoRedoInProcess = true;
    inkCanvas1.strokes.Add(addedstrokes);
    inkCanvas1.strokes.Remove(removedstrokes);
    undoRedoInProcess = false;
}

解决方法

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