Практическое руководство. Анимация расположения объекта с помощью PointAnimation
В этом примере показано, как использовать PointAnimation класс для анимации объекта вдоль Path.
Пример
В следующем примере эллипс перемещается Path из одной точки на экране в другой. Пример анимирует положение EllipseGeometry с помощью PointAnimation для анимации Center свойство.
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Media;
namespace SDKSamples
{
// This example shows how to use PointAnimation to animate the
// position of an ellipse by animating the Center property of an
// EllipseGeometry. PointAnimation is used because the Center property
// takes a Point value.
public class PointAnimationExample : Page
{
public PointAnimationExample()
{
// Create a NameScope for this page so that
// Storyboards can be used.
NameScope.SetNameScope(this, new NameScope());
EllipseGeometry myEllipseGeometry = new EllipseGeometry();
myEllipseGeometry.Center = new Point(200, 100);
myEllipseGeometry.RadiusX = 15;
myEllipseGeometry.RadiusY = 15;
// Assign the EllipseGeometry a name so that
// it can be targeted by a Storyboard.
this.RegisterName(
"MyAnimatedEllipseGeometry", myEllipseGeometry);
Path myPath = new Path();
myPath.Fill = Brushes.Blue;
myPath.Margin = new Thickness(15);
myPath.Data = myEllipseGeometry;
PointAnimation myPointAnimation = new PointAnimation();
myPointAnimation.Duration = TimeSpan.FromSeconds(2);
// Set the animation to repeat forever.
myPointAnimation.RepeatBehavior = RepeatBehavior.Forever;
// Set the From and To properties of the animation.
myPointAnimation.From = new Point(200, 100);
myPointAnimation.To = new Point(450, 250);
// Set the animation to target the Center property
// of the object named "MyAnimatedEllipseGeometry."
Storyboard.SetTargetName(myPointAnimation, "MyAnimatedEllipseGeometry");
Storyboard.SetTargetProperty(
myPointAnimation, new PropertyPath(EllipseGeometry.CenterProperty));
// Create a storyboard to apply the animation.
Storyboard ellipseStoryboard = new Storyboard();
ellipseStoryboard.Children.Add(myPointAnimation);
// Start the storyboard when the Path loads.
myPath.Loaded += delegate(object sender, RoutedEventArgs e)
{
ellipseStoryboard.Begin(this);
};
Canvas containerCanvas = new Canvas();
containerCanvas.Children.Add(myPath);
Content = containerCanvas;
}
}
}