Timeline.CurrentGlobalSpeedInvalidated Kejadian
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Terjadi ketika laju saat berlangsung untuk jam garis waktu berubah.
public:
event EventHandler ^ CurrentGlobalSpeedInvalidated;public event EventHandler CurrentGlobalSpeedInvalidated;member this.CurrentGlobalSpeedInvalidated : EventHandler Public Custom Event CurrentGlobalSpeedInvalidated As EventHandler Jenis Acara
Contoh
Contoh berikut menunjukkan cara mendaftar untuk peristiwa tersebut 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
Keterangan
Kecepatan global jam garis waktu saat ini berubah dalam keadaan berikut:
Jam berubah arah karena pengaturan garis AutoReverse waktunya.
Jam mempercepat atau mempercepat karena pengaturan garis AccelerationRatio waktu atau DecelerationRatio propertinya.
Jam dijeda atau dilanjutkan.
Jam menjadi tidak aktif atau diaktifkan kembali.
CurrentGlobalSpeed Salah satu perubahan induk jam.
Kejadian CurrentGlobalSpeedInvalidated ini berguna untuk melacak kapan jam garis waktu dijeda; di penanganan aktivitas Anda, gunakan metode papan GetCurrentGlobalSpeed cerita Anda atau periksa properti jam IsPaused untuk menentukan apakah jamnya dijeda; bandingkan ini dengan nilai yang di-cache sebelumnya untuk menentukan apakah jam berubah.
Parameter ObjectEventHandler penanganan aktivitas adalah garis Clockwaktu .
Meskipun penanganan aktivitas ini tampaknya dikaitkan dengan garis waktu, penanganan aktivitas ini benar-benar mendaftar dengan yang Clock dibuat untuk garis waktu ini. Untuk informasi selengkapnya, lihat Gambaran Umum Peristiwa Pengaturan Waktu.
