Control the Progress of an Animation : Animation « Windows Presentation Foundation « VB.Net

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VB.Net » Windows Presentation Foundation » AnimationScreenshots 
Control the Progress of an Animation
Control the Progress of an Animation
   

<Window x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="" Height="300" Width="600">
    <Grid>
        <Rectangle x:Name="Rectangle" Height="100" Width="100" Fill="Firebrick">
            <Rectangle.RenderTransform>
                <MatrixTransform x:Name="RectangleMatrixTransform" />
            </Rectangle.RenderTransform>

            <Rectangle.Triggers>
                <EventTrigger RoutedEvent="Rectangle.Loaded">
                    <BeginStoryboard x:Name="RectangleStoryboard">
                        <Storyboard x:Name="Storyboard" CurrentTimeInvalidated="Storyboard_Changed">
                            <MatrixAnimationUsingPath Storyboard.TargetName="RectangleMatrixTransform" Storyboard.TargetProperty="Matrix" Duration="0:0:10"
                RepeatBehavior="Forever">
                                <MatrixAnimationUsingPath.PathGeometry>
                                    <PathGeometry Figures="M -100,0 300, 0" />
                                </MatrixAnimationUsingPath.PathGeometry>
                            </MatrixAnimationUsingPath>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Rectangle.Triggers>
        </Rectangle>

        <Slider x:Name="Seeker" Minimum="0" Maximum="1" SmallChange="0.001" ValueChanged="Seeker_ValueChanged">
            <Slider.Triggers>
                <EventTrigger RoutedEvent="Slider.MouseLeftButtonDown">
                    <StopStoryboard BeginStoryboardName="RectangleStoryboard" />
                </EventTrigger>
                <EventTrigger RoutedEvent="Slider.MouseLeftButtonUp">
                    <ResumeStoryboard BeginStoryboardName="RectangleStoryboard" />
                </EventTrigger>
            </Slider.Triggers>
        </Slider>
    </Grid>
</Window>

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Media.Animation
Imports System.Windows.Input

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub
    Private Sub Storyboard_Changed(sender As Object, e As System.EventArgs)
      Dim clockGroup As ClockGroup = TryCast(sender, ClockGroup)
      Dim animationClock As AnimationClock = TryCast(clockGroup.Children(0), AnimationClock)
      If animationClock.CurrentProgress.HasValue Then
        Seeker.Value = animationClock.CurrentProgress.Value
      End If
    End Sub
    Private Sub Seeker_ValueChanged(sender As Object, e As RoutedPropertyChangedEventArgs(Of Double))
      Storyboard.Seek(Rectangle, TimeSpan.FromTicks(CLng(Storyboard.Children(0).Duration.TimeSpan.Ticks * Seeker.Value)), TimeSeekOrigin.BeginTime)
    End Sub
  End Class
End Namespace

   
    
    
  
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