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方法: アニメーションを使用してメディアを再生する

この例では、同じ MediaTimelineで DoubleAnimationUsingKeyFrames クラスと Storyboard クラスを使用して、メディアとアニメーションを同時に再生する方法を示します。

例

MediaTimeline 内の 1 つ以上の Storyboard オブジェクトを、アニメーションなどの他の Timeline オブジェクトと共に使用できます。

次の使用例は、SlipBehavior の Storyboard プロパティを Slipの値に設定します。このプロパティは、メディア (この例のビデオ) が進行するまでアニメーションが進行しないことを指定します。 この機能は、読み込み時間が原因でメディアの再生が遅れる場合に必要になる場合があります。

<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>

こちらも参照ください