Cara: Menerima Pemberitahuan Saat Status Jam Berubah

Peristiwa jam CurrentStateInvalidated terjadi ketika CurrentState menjadi tidak valid, seperti ketika jam dimulai atau berhenti. Anda dapat mendaftar untuk acara ini dengan langsung menggunakan Clock, atau Anda dapat mendaftar menggunakan Timeline.

Dalam contoh berikut, satu Storyboard dan dua DoubleAnimation objek digunakan untuk menganimasikan lebar dua persegi panjang. Kejadian CurrentStateInvalidated ini digunakan untuk mendengarkan perubahan status jam.

Contoh

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
  x:Class="Microsoft.Samples.Animation.TimingBehaviors.StateExample"
  Background="LightGray">
  <StackPanel Margin="20">
  
    <TextBlock 
      Name="ParentTimelineStateTextBlock"></TextBlock>
    <TextBlock 
      Name="Animation1StateTextBlock"></TextBlock>
    <Rectangle 
      Name="Rectangle01"
      Width="100" Height="50" Fill="Orange" />    
    <TextBlock Name="Animation2StateTextBlock"></TextBlock>
    <Rectangle 
      Name="Rectangle02"
      Width="100" Height="50" Fill="Gray" />  
      
    <Button Content="Start Animations" Margin="20">
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <BeginStoryboard>
            <Storyboard RepeatBehavior="2x" AutoReverse="True"
              CurrentStateInvalidated="parentTimelineStateInvalidated" >
              <DoubleAnimation
                Storyboard.TargetName="Rectangle01"
                Storyboard.TargetProperty="Width"
                From="10" To="200" Duration="0:0:9"
                BeginTime="0:0:1" 
                CurrentStateInvalidated="animation1StateInvalidated"/>
              <DoubleAnimation
                Storyboard.TargetName="Rectangle02"
                Storyboard.TargetProperty="Width"
                From="10" To="200" Duration="0:0:8"
                BeginTime="0:0:1" 
                CurrentStateInvalidated="animation2StateInvalidated" />            
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>
      </Button.Triggers>
    </Button>
  
  
  </StackPanel>
</Page>

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace Microsoft.Samples.Animation.TimingBehaviors
{

    public partial class StateExample : Page
    {

        private void parentTimelineStateInvalidated(object sender, EventArgs args)
        {
            Clock myClock = (Clock)sender;
            ParentTimelineStateTextBlock.Text +=
                myClock.CurrentTime.ToString() + ":"
                + myClock.CurrentState.ToString() + " ";
        }

        private void animation1StateInvalidated(object sender, EventArgs args)
        {

            Clock myClock = (Clock)sender;

            Animation1StateTextBlock.Text +=
                myClock.Parent.CurrentTime.ToString() + ":"
                + myClock.CurrentState.ToString() + " ";
        }

        private void animation2StateInvalidated(object sender, EventArgs args)
        {

            Clock myClock = (Clock)sender;
            Animation2StateTextBlock.Text +=
                myClock.Parent.CurrentTime.ToString() + ":"
                + myClock.CurrentState.ToString() + " ";
        }
    }
}

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation

Namespace Microsoft.Samples.Animation.TimingBehaviors

    Partial Public Class StateExample
        Inherits Page

        Private Sub parentTimelineStateInvalidated(ByVal sender As Object, ByVal args As EventArgs)
            Dim myClock As Clock = CType(sender, Clock)
            ParentTimelineStateTextBlock.Text += myClock.CurrentTime.ToString() & ":" & myClock.CurrentState.ToString() & " "
        End Sub

        Private Sub animation1StateInvalidated(ByVal sender As Object, ByVal args As EventArgs)

            Dim myClock As Clock = CType(sender, Clock)

            Animation1StateTextBlock.Text += myClock.Parent.CurrentTime.ToString() & ":" & myClock.CurrentState.ToString() & " "
        End Sub

        Private Sub animation2StateInvalidated(ByVal sender As Object, ByVal args As EventArgs)

            Dim myClock As Clock = CType(sender, Clock)
            Animation2StateTextBlock.Text += myClock.Parent.CurrentTime.ToString() & ":" & myClock.CurrentState.ToString() & " "
        End Sub
    End Class
End Namespace

Ilustrasi berikut menunjukkan berbagai status animasi yang dimasukkan saat garis waktu induk (Papan Cerita) berlangsung.

Tabel berikut ini memperlihatkan waktu peristiwa Animasi1CurrentStateInvalidated diaktifkan:

Waktu (Detik)	Provinsi
1	Aktif
10	Aktif
19	Dihentikan
21	Aktif
30	Aktif
39	Dihentikan

Tabel berikut ini memperlihatkan waktu peristiwa Animation2CurrentStateInvalidated diaktifkan:

Waktu (Detik)	Provinsi
1	Aktif
9	Mengisi
11	Aktif
19	Dihentikan
21	Aktif
29	Mengisi
31	Aktif
39	Dihentikan

Perhatikan bahwa peristiwa Animation1CurrentStateInvalidated diaktifkan pada 10 detik, meskipun statusnya tetap Active. Itu karena statusnya berubah pada 10 detik, tetapi berubah dari Active ke Filling dan kemudian kembali ke Active dalam centang yang sama.