Timeline.CurrentTimeInvalidated 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 quand la propriété CurrentTime de Clock de la chronologie est mise à jour.
public:
event EventHandler ^ CurrentTimeInvalidated;
public event EventHandler CurrentTimeInvalidated;
member this.CurrentTimeInvalidated : EventHandler
Public Custom Event CurrentTimeInvalidated As EventHandler
Type d'événement
Exemples
L’exemple suivant montre comment s’inscrire à l’événement CurrentTimeInvalidated .
/*
This example shows how to register for the
CurrentTimeInvalidated 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 TimelineCurrentTimeInvalidatedExample : Page {
private TextBlock currentTimeTextBlock;
public TimelineCurrentTimeInvalidatedExample()
{
// 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;
Storyboard.SetTargetName(angleAnimation, "animatedTransform");
Storyboard.SetTargetProperty(angleAnimation,
new PropertyPath(RotateTransform.AngleProperty));
Storyboard theStoryboard = new Storyboard();
theStoryboard.Children.Add(angleAnimation);
// Register the CurrentTimeInvalidated event.
// You must register for events before you begin
// the storyboard.
theStoryboard.CurrentTimeInvalidated +=
new EventHandler(storyboard_CurrentTimeInvalidated);
// Start the storyboard.
theStoryboard.Begin(animatedRectangle, true);
}
private void storyboard_CurrentTimeInvalidated(object sender, EventArgs e)
{
// Sender is the clock that was created for this storyboard.
Clock storyboardClock = (Clock)sender;
// Update the TextBlock with the storyboard's current time.
currentTimeTextBlock.Text = storyboardClock.CurrentTime.ToString();
}
}
}
'
'
' This example shows how to register for the
' CurrentTimeInvalidated 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 TimelineCurrentTimeInvalidatedExample
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
Storyboard.SetTargetName(angleAnimation, "animatedTransform")
Storyboard.SetTargetProperty(angleAnimation, New PropertyPath(RotateTransform.AngleProperty))
Dim theStoryboard As New Storyboard()
theStoryboard.Children.Add(angleAnimation)
' Register the CurrentTimeInvalidated event.
' You must register for events before you begin
' the storyboard.
AddHandler theStoryboard.CurrentTimeInvalidated, AddressOf storyboard_CurrentTimeInvalidated
' Start the storyboard.
theStoryboard.Begin(animatedRectangle, True)
End Sub
Private Sub storyboard_CurrentTimeInvalidated(ByVal sender As Object, ByVal e As EventArgs)
' Sender is the clock that was created for this storyboard.
Dim storyboardClock As Clock = CType(sender, Clock)
' Update the TextBlock with the storyboard's current time.
currentTimeTextBlock.Text = storyboardClock.CurrentTime.ToString()
End Sub
End Class
End Namespace
Remarques
Utilisez l’événement CurrentStateInvalidated lorsque vous souhaitez être averti lorsque le CurrentTime d’un chronologie est Clock mis à jour.
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.