方法 : アニメーションを使用してメディアを再生する
次の例では、同じ Storyboard 内の MediaTimeline クラスと DoubleAnimationUsingKeyFrames 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。
使用例
Storyboard 内の MediaTimeline オブジェクトを、他の Timeline オブジェクト、たとえばアニメーションと同時に使用することができます。
次の例では、Storyboard の SlipBehavior プロパティの値を Slip に設定します。この値は、メディア (この例ではビデオ) が進行しなければアニメーションも進行しないことを示します。 この機能は、読み込み時間のためにメディアの再生が遅れる場合などに必要です。
<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://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>
<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://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>