Question

我在程序启动后几秒钟创建了一些省略号，就像这样Ellipse myEllipse = new Ellipse();然后我像这样移动省略号

public void MoveTo(Shape target, double newX, double newY, double oldX, double oldY)
        {

            TranslateTransform trans = new TranslateTransform();
            target.RenderTransform = trans;
            DoubleAnimation anim1 = new DoubleAnimation(0, newY - oldY, TimeSpan.FromSeconds(5));
            DoubleAnimation anim2 = new DoubleAnimation(0, newX - oldX, TimeSpan.FromSeconds(5));
            trans.BeginAnimation(TranslateTransform.YProperty, anim1);
            trans.BeginAnimation(TranslateTransform.XProperty, anim2);

        }

当他们移动到新位置时，我想在移动时获得新的X和Y位置，我使用计时器在我想要的时间获得他们的X和Y但是当我使用Canvas.GetLeft(name)时它返回Nan并且我使用Point p = mEllipse.TranslatePoint(new Point(0, 0), canvasName);并返回椭圆的初始位置而不是新的

Answer 1

如果您为Canvas.GetLeft和Canvas.GetTop属性设置动画，则可以通过调用Canvas.Left和Canvas.Top来获取画布子项的当前位置：

public static void MoveTo(UIElement target, double x, double y)
{
    var duration = TimeSpan.FromSeconds(5);
    target.BeginAnimation(Canvas.LeftProperty, new DoubleAnimation(x, duration));
    target.BeginAnimation(Canvas.TopProperty, new DoubleAnimation(y, duration));
}

请注意，您还必须为Canvas.Left和Canvas.Top属性设置初始值，例如

Canvas.SetLeft(myEllipse, 0);
Canvas.SetTop(myEllipse, 0);

如何在WPF中获得移动形状的新位置

1 个答案: