changement ScaleTransform fonctionne pas après utilisation Storyboard

Question

je change ScaleTransform avec Storyboard et fonctionne très bien, mais après le changement ScaleTransform fonctionne pas,

échantillon: scaleTransform.ScaleX = 1 après utilisation Storyboard: scaleTransform.ScaleX = 2 lors de la modification de mon code scaleTransform.ScaleX + = 1; mais scaleTransform.ScaleX = 2,

 private Storyboard _story = new Storyboard(); 

    private void CreateAnimation(double x, double y, TimeSpan delay) 
    { 
     var stScaleX = new DoubleAnimation(scaleTransform.ScaleX, x, delay); 
     var stScaleY = new DoubleAnimation(scaleTransform.ScaleY, y, delay); 
     stScaleX.SetValue(Storyboard.TargetProperty, mainCanvas); 
     stScaleX.SetValue(Storyboard.TargetPropertyProperty, new PropertyPath("LayoutTransform.Children[0].ScaleX")); 


     stScaleY.SetValue(Storyboard.TargetNameProperty, mainCanvas.Name); 
     stScaleY.SetValue(Storyboard.TargetPropertyProperty, new PropertyPath("LayoutTransform.Children[0].ScaleY")); 
     _story.Children.Add(stScaleY); 
     _story.Children.Add(stScaleX); 
     mainCanvas.Resources.Clear(); 

     _story.Changed += St_Changed; 
     _story.Completed += St_Completed; 
     _story.Begin(mainCanvas); 
    } 

    private void St_Completed(object sender, EventArgs e) 
    { 

     _story.Changed -= St_Changed; 
     _story.Completed -= St_Completed; 
     var newXy = new Point(_scalePoint.X, _scalePoint.Y); 
     scrollViewer.ScrollToHorizontalOffset(newXy.X); 
     scrollViewer.ScrollToVerticalOffset(newXy.Y); 
     var zs = GetScaleTransform(mainCanvas); 
     ZoomLevel = zs.ScaleX; 
     _story.Stop(); 
     _story.Remove(); 
     mainCanvas.Resources.Clear(); 
    } 

    private void St_Changed(object sender, EventArgs e) 
    { 
     var newXy = new Point(_scalePoint.X, _scalePoint.Y); 
     scrollViewer.ScrollToHorizontalOffset(newXy.X); 
     scrollViewer.ScrollToVerticalOffset(newXy.Y); 
    } 

    private void mainCanvas_MouseWheel(object sender, MouseWheelEventArgs e) 
    { 
     var st = GetScaleTransform(mainCanvas); 
     var zoom = e.Delta > 0 ? .6 : -.6; 
     if (!(e.Delta > 0) && (st.ScaleX < .4 || st.ScaleY < .4)) 
      return; 
     if (st.ScaleX <= 1 && zoom < 0) return; 
     var relativeOnImage = e.GetPosition(mainCanvas); 
     var relativeOnScreen = e.GetPosition(Grid1); 

     scaleTransform.ScaleX = st.ScaleX+zoom; 
     scaleTransform.ScaleY = st.ScaleY+ zoom; 

     if (st.ScaleX < 1) st.ScaleX = 1; 
     if (st.ScaleY < 1) st.ScaleY = 1; 

     var newSizeX = Grid1.ActualWidth*st.ScaleX; 
     newSizeX = ((newSizeX*relativeOnImage.X)/ Grid1.ActualWidth)- relativeOnScreen.X; 
     var newSizeY = Grid1.ActualHeight * st.ScaleY; 
     newSizeY = ((newSizeY*relativeOnImage.Y)/ Grid1.ActualHeight)- relativeOnScreen.Y; 
     scrollViewer.ScrollToHorizontalOffset(newSizeX); 
     scrollViewer.ScrollToVerticalOffset(newSizeY); 
     IsZooming = st.ScaleX > 1 || st.ScaleY > 1; 
    } 

Answer 1

Je sloved,

je change mon code, et a travaillé

var oldDataX = scaleTransform.ScaleX; 
     var oldDataY = scaleTransform.ScaleY; 
     scaleTransform.BeginAnimation(ScaleTransform.ScaleXProperty, null); 
     scaleTransform.BeginAnimation(ScaleTransform.ScaleYProperty, null); 

     scaleTransform.ScaleX = oldDataX + zoom; 
     scaleTransform.ScaleY = oldDataY + zoom; 

pour plus d'informations:

https://msdn.microsoft.com/en-us/library/aa970493(v=vs.90).aspx http://www.codeproject.com/Tips/146505/WPF-Storyboard-animation-locks-properties-it-s-ani