我正在尝试动画椭圆以从画布上的A点移动到B点。
public void AnimateSensor(double x, double y, Ellipse sensor)
{
if (!Double.IsNaN(x))
{
DoubleAnimation animX = new DoubleAnimation();
animX.To = x;
animX.Duration = new Duration(TimeSpan.FromMilliseconds(1000));
DoubleAnimation animY = new DoubleAnimation();
animY.To = y;
animY.Duration = new Duration(TimeSpan.FromMilliseconds(1000));
TranslateTransform rt = new TranslateTransform();
sensor.RenderTransform = rt;
rt.BeginAnimation(sensor.GetValue(Canvas.TopProperty), animX);
rt.BeginAnimation(sensor.GetValue(Canvas.LeftProperty), animY);
}
else
Console.WriteLine("x or y is NaN");
}
我用一组坐标和一个Ellipse调用这个方法,但我似乎无法弄清楚如何在BeginAnimation中指定依赖值。我尝试了'sensor.GetValue(Canvas.LeftProperty)',但它说它是一个对象,需要一个依赖属性。当我使用'as DependencyProperty'时它使它为null,当我尝试转换它时,它说你不能从double转换为DependencyProperty。
答案 0 :(得分:2)
您可以为Ellipse的Canvas.Left
和Canvas.Top
属性设置动画,而无需TranslateTransform,如下所示:
sensor.BeginAnimation(Canvas.LeftProperty, animX);
sensor.BeginAnimation(Canvas.TopProperty, animY);
或TranslateTransform的X
和Y
属性,如下所示:
if (!(sensor.RenderTransform is TranslateTransform))
{
// assign RenderTransform only once
sensor.RenderTransform = new TranslateTransform();
}
var transform = (TranslateTransform)sensor.RenderTransform;
transform.BeginAnimation(TranslateTransform.XProperty, animX);
transform.BeginAnimation(TranslateTransform.YProperty, animY);