Procedura: ottenere il valore non animato di una proprietà animata
Aggiornamento: novembre 2007
Per ottenere il valore non animato della proprietà animata di un oggetto si utilizza il metodo GetAnimationBaseValue dell'oggetto. Gli oggetti UIElement, Animatablee ContentElement dispongono ognuno di un'implementazione specifica.
Esempio
Nell'esempio seguente,vengono recuperati e visualizzati i valori non animati di proprietà animate.
/*
This sample shows how to use the
Animatable.GetAnimationBaseValue and
UIElement.GetAnimationBaseValue methods
to get the non-animated value of an
animated Animatable or UIElement.
*/
using System;
using System.Windows;
using System.Windows.Navigation;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls;
using System.Windows.Input;
namespace Microsoft.Samples.Animation.TimingBehaviors
{
public class GetAnimationBaseValueExample : Page {
private RotateTransform animatedRotateTransform;
public GetAnimationBaseValueExample()
{
WindowTitle = "GetAnimationBaseValue Example";
StackPanel myPanel = new StackPanel();
myPanel.Margin = new Thickness(20.0);
// Create a button.
Button animatedButton = new Button();
animatedButton.Content = "Click Me";
animatedButton.Width = 100;
animatedButton.Margin = new Thickness(100);
// Create and animate a RotateTransform and
// apply it to the button's RenderTransform
// property.
animatedRotateTransform = new RotateTransform();
animatedRotateTransform.Angle = 45;
DoubleAnimation angleAnimation =
new DoubleAnimation(0,360, TimeSpan.FromSeconds(5));
angleAnimation.RepeatBehavior = RepeatBehavior.Forever;
animatedRotateTransform.BeginAnimation(
RotateTransform.AngleProperty, angleAnimation);
animatedButton.RenderTransform = animatedRotateTransform;
animatedButton.RenderTransformOrigin = new Point(0.5,0.5);
// Animate the button's width.
DoubleAnimation widthAnimation =
new DoubleAnimation(120, 300, TimeSpan.FromSeconds(5));
widthAnimation.RepeatBehavior = RepeatBehavior.Forever;
widthAnimation.AutoReverse = true;
animatedButton.BeginAnimation(Button.WidthProperty, widthAnimation);
// Handle button clicks.
animatedButton.Click += new RoutedEventHandler(animatedButton_Clicked);
// Add the button to the panel.
myPanel.Children.Add(animatedButton);
this.Content = myPanel;
}
// Display the base value for Button.Width and RotateTransform.Angle.
private void animatedButton_Clicked(object sender, RoutedEventArgs e)
{
Button animatedButton = (Button)sender;
MessageBox.Show("Button width base value: " +
animatedButton.GetAnimationBaseValue(Button.WidthProperty)
+ "\nRotateTransform base value: " +
animatedRotateTransform.GetAnimationBaseValue(RotateTransform.AngleProperty));
}
}
}
Vedere anche
Concetti
Cenni preliminari sull'animazione