Timeline.CurrentGlobalSpeedInvalidated Événement
Définition
Important
Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.
Se produit lorsque le taux auquel l'heure progresse pour l'horloge de la chronologie change.
public:
event EventHandler ^ CurrentGlobalSpeedInvalidated;public event EventHandler CurrentGlobalSpeedInvalidated;member this.CurrentGlobalSpeedInvalidated : EventHandler Public Custom Event CurrentGlobalSpeedInvalidated As EventHandler Type d'événement
Exemples
L’exemple suivant montre comment s’inscrire à l’événement CurrentGlobalSpeedInvalidated .
/*
This example shows how to register for the
CurrentGlobalSpeedInvalidated event
using a Timeline.
*/
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 TimelineCurrentGlobalSpeedInvalidatedExample : Page {
private TextBlock currentTimeTextBlock;
public TimelineCurrentGlobalSpeedInvalidatedExample()
{
// Create a name scope.
NameScope.SetNameScope(this, new NameScope());
WindowTitle = "GetAnimationBaseValue Example";
StackPanel myPanel = new StackPanel();
myPanel.Margin = new Thickness(20);
// Create a rectangle.
Rectangle animatedRectangle = new Rectangle();
animatedRectangle.Width = 100;
animatedRectangle.Height = 50;
animatedRectangle.Margin = new Thickness(50);
animatedRectangle.Fill = Brushes.Orange;
animatedRectangle.Stroke = Brushes.Gray;
animatedRectangle.StrokeThickness = 2;
// Create a RotateTransform.
RotateTransform animatedTransform = new RotateTransform();
animatedTransform.Angle = 0;
this.RegisterName("animatedTransform", animatedTransform);
animatedRectangle.RenderTransform = animatedTransform;
animatedRectangle.RenderTransformOrigin = new Point(0.5,0.5);
myPanel.Children.Add(animatedRectangle);
this.Content = myPanel;
// Create a TextBlock to show the storyboard's current time.
currentTimeTextBlock = new TextBlock();
myPanel.Children.Add(currentTimeTextBlock);
// Animate the RotateTransform's angle using a Storyboard.
DoubleAnimation angleAnimation = new DoubleAnimation(0,360, TimeSpan.FromSeconds(5));
angleAnimation.RepeatBehavior = RepeatBehavior.Forever;
angleAnimation.AutoReverse = true;
Storyboard.SetTargetName(angleAnimation, "animatedTransform");
Storyboard.SetTargetProperty(angleAnimation,
new PropertyPath(RotateTransform.AngleProperty));
Storyboard theStoryboard = new Storyboard();
theStoryboard.Children.Add(angleAnimation);
// Register the CurrentGlobalSpeedInvalidated event.
// You must register for events before you begin
// the storyboard.
angleAnimation.CurrentGlobalSpeedInvalidated +=
new EventHandler(angleAnimation_CurrentGlobalSpeedInvalidated);
// Start the storyboard.
theStoryboard.Begin(animatedRectangle, true);
}
private void angleAnimation_CurrentGlobalSpeedInvalidated(object sender, EventArgs e)
{
// Sender is the clock that was created for the DoubleAnimation.
Clock doubleAnimationClock = (Clock)sender;
// Update the TextBlock with the time of its parent.
currentTimeTextBlock.Text = doubleAnimationClock.Parent.CurrentTime.ToString();
}
}
}
'
'
' This example shows how to register for the
' CurrentGlobalSpeedInvalidated event
' using a Timeline.
'
'
Imports System.Windows
Imports System.Windows.Navigation
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
Imports System.Windows.Controls
Imports System.Windows.Input
Namespace Microsoft.Samples.Animation.TimingBehaviors
Public Class TimelineCurrentGlobalSpeedInvalidatedExample
Inherits Page
Private currentTimeTextBlock As TextBlock
Public Sub New()
' Create a name scope.
NameScope.SetNameScope(Me, New NameScope())
WindowTitle = "GetAnimationBaseValue Example"
Dim myPanel As New StackPanel()
myPanel.Margin = New Thickness(20)
' Create a rectangle.
Dim animatedRectangle As New Rectangle()
With animatedRectangle
.Width = 100
.Height = 50
.Margin = New Thickness(50)
.Fill = Brushes.Orange
.Stroke = Brushes.Gray
.StrokeThickness = 2
End With
' Create a RotateTransform.
Dim animatedTransform As New RotateTransform()
animatedTransform.Angle = 0
Me.RegisterName("animatedTransform", animatedTransform)
animatedRectangle.RenderTransform = animatedTransform
animatedRectangle.RenderTransformOrigin = New Point(0.5, 0.5)
myPanel.Children.Add(animatedRectangle)
Me.Content = myPanel
' Create a TextBlock to show the storyboard's current time.
currentTimeTextBlock = New TextBlock()
myPanel.Children.Add(currentTimeTextBlock)
' Animate the RotateTransform's angle using a Storyboard.
Dim angleAnimation As New DoubleAnimation(0, 360, TimeSpan.FromSeconds(5))
angleAnimation.RepeatBehavior = RepeatBehavior.Forever
angleAnimation.AutoReverse = True
Storyboard.SetTargetName(angleAnimation, "animatedTransform")
Storyboard.SetTargetProperty(angleAnimation, New PropertyPath(RotateTransform.AngleProperty))
Dim theStoryboard As New Storyboard()
theStoryboard.Children.Add(angleAnimation)
' Register the CurrentGlobalSpeedInvalidated event.
' You must register for events before you begin
' the storyboard.
AddHandler angleAnimation.CurrentGlobalSpeedInvalidated, AddressOf angleAnimation_CurrentGlobalSpeedInvalidated
' Start the storyboard.
theStoryboard.Begin(animatedRectangle, True)
End Sub
Private Sub angleAnimation_CurrentGlobalSpeedInvalidated(ByVal sender As Object, ByVal e As EventArgs)
' Sender is the clock that was created for the DoubleAnimation.
Dim doubleAnimationClock As Clock = CType(sender, Clock)
' Update the TextBlock with the time of its parent.
currentTimeTextBlock.Text = doubleAnimationClock.Parent.CurrentTime.ToString()
End Sub
End Class
End Namespace
Remarques
La vitesse globale actuelle de l’horloge d’un chronologie change dans les circonstances suivantes :
L’horloge change de direction en raison du paramètre de AutoReverse son chronologie.
L’horloge accélère ou ralentit en raison de ses paramètres de chronologie ou DecelerationRatio de AccelerationRatio propriété.
L’horloge est suspendue ou reprise.
L’horloge devient inactive ou se réactive.
de CurrentGlobalSpeed l’un des changements parents de l’horloge.
L’événement CurrentGlobalSpeedInvalidated est utile pour suivre quand l’horloge d’un chronologie est en pause ; dans votre gestionnaire d’événements, utilisez la méthode de GetCurrentGlobalSpeed votre storyboard ou case activée la propriété de IsPaused l’horloge pour déterminer si son horloge est suspendue; comparez-la à une valeur précédemment mise en cache pour déterminer si elle a changé.
Le Object paramètre du EventHandler gestionnaire d’événements est le chronologie Clock.
Bien que ce gestionnaire d’événements semble être associé à un chronologie, il s’inscrit en fait avec le Clock créé pour cette chronologie. Pour plus d’informations, consultez Vue d’ensemble des événements de minutage.
