Como: Animate a Property by Using an AnimationClock
This example shows how to use Clock objects to animate a property.
There are three ways to animate a dependency property:
Create an AnimationTimeline and associate it with that property by using a Storyboard.
Use the object's BeginAnimation method to apply a single AnimationTimeline to a target property.
Create an AnimationClock from an AnimationTimeline and apply it to a property.
Storyboard objects and the BeginAnimation method enable you to animate properties without directly creating and distributing clocks (for examples, see Como: Animate a Property by Using a Storyboard and Como: Animar uma Propriedade Sem Usar um Storyboard); clocks are created and distributed for you automatically.
Exemplo
The following example shows how to create an AnimationClock and apply it to two similar properties.
'
' This example shows how to create and apply
' an AnimationClock.
'
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Namespace Microsoft.Samples.Animation.TimingBehaviors
Public Class AnimationClockExample
Inherits Page
Private myScaleTransform As ScaleTransform
Public Sub New()
Me.WindowTitle = "Opacity Animation Example"
Me.Background = Brushes.White
Dim myStackPanel As New StackPanel()
myStackPanel.Margin = New Thickness(20)
' Create a button that with a ScaleTransform.
' The ScaleTransform will animate when the
' button is clicked.
Dim myButton As New Button()
myButton.Margin = New Thickness(50)
myButton.HorizontalAlignment = HorizontalAlignment.Left
myButton.Content = "Click Me"
myScaleTransform = New ScaleTransform(1,1)
myButton.RenderTransform = myScaleTransform
' Associate an event handler with the
' button's Click event.
AddHandler myButton.Click, AddressOf myButton_Clicked
myStackPanel.Children.Add(myButton)
Me.Content = myStackPanel
End Sub
' Create and apply and animation when the button is clicked.
Private Sub myButton_Clicked(ByVal sender As Object, ByVal e As RoutedEventArgs)
' Create a DoubleAnimation to animate the
' ScaleTransform.
Dim myAnimation As New DoubleAnimation(1, 5, New Duration(TimeSpan.FromSeconds(5))) ' "To" value - "From" value
myAnimation.AutoReverse = True
' Create a clock the for the animation.
Dim myClock As AnimationClock = myAnimation.CreateClock()
' Associate the clock the ScaleX and
' ScaleY properties of the button's
' ScaleTransform.
myScaleTransform.ApplyAnimationClock(ScaleTransform.ScaleXProperty, myClock)
myScaleTransform.ApplyAnimationClock(ScaleTransform.ScaleYProperty, myClock)
End Sub
End Class
End Namespace
/*
This example shows how to create and apply
an AnimationClock.
*/
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
namespace Microsoft.Samples.Animation.TimingBehaviors
{
public class AnimationClockExample : Page
{
ScaleTransform myScaleTransform;
public AnimationClockExample()
{
this.WindowTitle = "Opacity Animation Example";
this.Background = Brushes.White;
StackPanel myStackPanel = new StackPanel();
myStackPanel.Margin = new Thickness(20);
// Create a button that with a ScaleTransform.
// The ScaleTransform will animate when the
// button is clicked.
Button myButton = new Button();
myButton.Margin = new Thickness(50);
myButton.HorizontalAlignment = HorizontalAlignment.Left;
myButton.Content = "Click Me";
myScaleTransform = new ScaleTransform(1,1);
myButton.RenderTransform = myScaleTransform;
// Associate an event handler with the
// button's Click event.
myButton.Click += new RoutedEventHandler(myButton_Clicked);
myStackPanel.Children.Add(myButton);
this.Content = myStackPanel;
}
// Create and apply and animation when the button is clicked.
private void myButton_Clicked(object sender, RoutedEventArgs e)
{
// Create a DoubleAnimation to animate the
// ScaleTransform.
DoubleAnimation myAnimation =
new DoubleAnimation(
1, // "From" value
5, // "To" value
new Duration(TimeSpan.FromSeconds(5))
);
myAnimation.AutoReverse = true;
// Create a clock the for the animation.
AnimationClock myClock = myAnimation.CreateClock();
// Associate the clock the ScaleX and
// ScaleY properties of the button's
// ScaleTransform.
myScaleTransform.ApplyAnimationClock(
ScaleTransform.ScaleXProperty, myClock);
myScaleTransform.ApplyAnimationClock(
ScaleTransform.ScaleYProperty, myClock);
}
}
}
Para obter um exemplo mostrando como controlar interativamente um Clock após ele ser iniciado, consulte Como: Controle interativamente um relógio.
Consulte também
Tarefas
Como: Animate a Property by Using a Storyboard
Como: Animar uma Propriedade Sem Usar um Storyboard