双动画或更新依赖项属性后，椭圆位置不会更改。 [英] Ellipse position not changing after double animation or Updating dependency property.

问题描述

在椭圆上应用transaleTransform后，它的位置没有变化。图形上它的位置在画布上得到改变。但是当通过下面的代码得到它的位置时，它的位置保持不变。

After applying transaleTransform on ellipse , it''s position not getting change. graphically it''s position get change on canvas. But when getting it''s position by below code it''s postion remain same.

Point pt = new Point();
           pt.X = (double)el.GetValue(Canvas.LeftProperty);
           pt.Y = (double)el.GetValue(Canvas.TopProperty);

翻译代码

code for translating it

 TranslateTransform offsetTransform = new TranslateTransform();
                
                DoubleAnimation offsetXAnimation = new DoubleAnimation(0,dx, new Duration(TimeSpan.FromSeconds(duration)));
                DoubleAnimation offsetYAnimation = new DoubleAnimation(0,dy, new Duration(TimeSpan.FromSeconds(duration)));
                //offsetXAnimation.RepeatBehavior = RepeatBehavior.Forever;
                offsetXAnimation.BeginTime = TimeSpan.FromSeconds(delay);
                offsetTransform.BeginAnimation(TranslateTransform.XProperty, offsetXAnimation);
                offsetTransform.BeginAnimation(TranslateTransform.YProperty, offsetYAnimation);
ellipse.RenderTransform = offsetTransform;

推荐答案

我无法设置更新与<$位置相关的属性的位置c $ c> Ellipse 。



如果我看到类似

I cannot set where do you update the properties related to the position of Ellipse.

I would agree that you do if I saw something like

myCanvas.SetLeft(MyEllipse, displacementX);
myCanvas.SetTop(MyEllipse, displacementY);

请参阅：

http://msdn.microsoft.com/en-us/library/system.windows .controls.canvas.settop.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.setleft.aspx [ ^ ]。



现在关于动画。我无法看到你在哪里设置 UIElement Canvas 的位置。你可以使用 TranslateTransform ，这是一种正确的方法，但你不应该期望你的任何依赖属性 UIElement 已更新。这些只是不同的事情。

-SA

Please see:
http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.settop.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.setleft.aspx[^].

Now about the animation. I cannot see where you animate the position of a UIElement of Canvas. You do it to the TranslateTransform, which is a right approach, but you should not expect that any dependency property of you UIElement are updated. These are just different things.

—SA

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