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Gör så här: Spela upp media med animeringar

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Det här exemplet visar hur du spelar upp media och animeringar samtidigt med hjälp av klasserna MediaTimeline och DoubleAnimationUsingKeyFrames i samma Storyboard.

Exempel

Du kan använda ett eller flera MediaTimeline objekt i en Storyboard tillsammans med andra Timeline objekt, till exempel animeringar.

I följande exempel anges egenskapen SlipBehavior för Storyboard till värdet Slip, som anger att animeringen inte fortsätter förrän mediet (videon i det här exemplet) fortsätter. Den här funktionen kan behövas om medieuppspelningen fördröjs på grund av inläsningstiden.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
  <Canvas>

    <!-- Upper right hand Canvas contains the animations. -->
    <Border BorderBrush="Black" BorderThickness="1"  Canvas.Left="250">
      <Canvas Width="250" Height="250" Background="White" >

        <!-- The two Path elements below create the purple and gold rings
             which are animated while the media is played. -->
        <Path Stroke="Purple" StrokeThickness="5">
          <Path.Data>
            <EllipseGeometry x:Name="MyEllipseGeometry" 
            Center="125,125" RadiusX="15" RadiusY="10" />
          </Path.Data>
        </Path>
        <Path Stroke="Gold" StrokeThickness="5">
          <Path.Data>
            <EllipseGeometry x:Name="MyEllipseGeometry2" 
            Center="125,125" RadiusX="10" RadiusY="15" />
          </Path.Data>
        </Path>
      </Canvas>
    </Border>

    <!-- Upper left hand Canvas contains the video. -->
    <Canvas Width="250" Height="250" Background="Green">
      <MediaElement Name="myvideo" Width="250" Height="250" 
       Canvas.Left="0" Canvas.Top="0">
        <MediaElement.Triggers>
          <EventTrigger RoutedEvent="MediaElement.Loaded">
            <EventTrigger.Actions>
              <BeginStoryboard>

                <!-- This Storyboard contains both media (video in this example) and animations. Note 
               the SlipBehavior value of "Slip" specifies that the animation does not progress
               until the media progresses. This might be desirable if media playback is delayed
               because of loading time. -->
                <Storyboard SlipBehavior="Slip">

                  <!-- The MediaTimeline controls the timing of the video and acts like other Timeline objects.  
                 For example, although the video clip (numbers.wmv) lasts longer, playback ends after six  
                 seconds because that is the duration of the MediaTimeline (Duration="0:0:6"). -->
                  <MediaTimeline Source="media\numbers.wmv" BeginTime="0:0:0" Duration="0:0:10"/>

                  <!-- The animations below animate the ellipses in the right hand pane. These animations are 
                 timed to correspond to the counting in the video. -->

                  <!-- Animate the RadiusY property of the purple ellipse. -->
                  <DoubleAnimationUsingKeyFrames
                    Storyboard.TargetName="MyEllipseGeometry"
                    Storyboard.TargetProperty="RadiusY"
                    RepeatBehavior="10x">
                    <DoubleAnimationUsingKeyFrames.KeyFrames>
                      <LinearDoubleKeyFrame Value="80" KeyTime="0:0:0.4" />
                      <SplineDoubleKeyFrame KeySpline="0.6,0.0 0.9,0.00" Value="0" KeyTime="0:0:1" />
                    </DoubleAnimationUsingKeyFrames.KeyFrames>
                  </DoubleAnimationUsingKeyFrames>

                  <!-- Animate the RadiusX property of the gold ellipse. -->
                  <DoubleAnimationUsingKeyFrames
                    Storyboard.TargetName="MyEllipseGeometry2"
                    Storyboard.TargetProperty="RadiusX"
                    RepeatBehavior="10x">
                    <DoubleAnimationUsingKeyFrames.KeyFrames>
                      <LinearDoubleKeyFrame Value="80" KeyTime="0:0:0.4" />
                      <SplineDoubleKeyFrame KeySpline="0.6,0.0 0.9,0.00" Value="0" KeyTime="0:0:1" />
                    </DoubleAnimationUsingKeyFrames.KeyFrames>
                  </DoubleAnimationUsingKeyFrames>

                </Storyboard>
              </BeginStoryboard>
            </EventTrigger.Actions>
          </EventTrigger>
        </MediaElement.Triggers>
      </MediaElement>
    </Canvas>
    
  </Canvas>
</Page>

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