PointAnimationUsingKeyFrames Classe

Definição

public ref class PointAnimationUsingKeyFrames sealed : Timeline

/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.UI.Xaml.Markup.ContentProperty(Name="KeyFrames")]
class PointAnimationUsingKeyFrames final : Timeline

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.UI.Xaml.Markup.ContentProperty(Name="KeyFrames")]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class PointAnimationUsingKeyFrames final : Timeline

[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.UI.Xaml.Markup.ContentProperty(Name="KeyFrames")]
public sealed class PointAnimationUsingKeyFrames : Timeline

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.UI.Xaml.Markup.ContentProperty(Name="KeyFrames")]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class PointAnimationUsingKeyFrames : Timeline

Public NotInheritable Class PointAnimationUsingKeyFrames
Inherits Timeline

<PointAnimationUsingKeyFrames>
  oneOrMorePointKeyFrames
</PointAnimationUsingKeyFrames>

Herança

Object Platform::Object IInspectable DependencyObject Timeline PointAnimationUsingKeyFrames

Atributos

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute ContentPropertyAttribute

Requisitos do Windows

Exemplos

O exemplo a seguir move uma elipse ao longo de um caminho triangular. O exemplo usa a classe PointAnimationUsingKeyFrames para animar a propriedade Center de um EllipseGeometry. Essa animação usa três quadros-chave da seguinte maneira:

1. Durante o primeiro semestre, ele usa uma instância da classe LinearPointKeyFrame para mover a elipse ao longo de um caminho a uma taxa constante de sua posição inicial. Quadros-chave lineares, como LinearPointKeyFrame , criam uma interpolação linear suave entre valores.
2. Durante o final do segundo semestre seguinte, ele usa uma instância da classe DiscretePointKeyFrame para mover repentinamente a elipse ao longo do caminho para a próxima posição. Quadros-chave discretos como DiscretePointKeyFrame criam saltos repentinos entre valores.
3. Durante os dois segundos finais, ele usa uma instância da classe SplinePointKeyFrame para mover a elipse de volta para sua posição inicial. Quadros de chave spline como SplinePointKeyFrame criam uma transição variável entre valores de acordo com os valores da propriedade KeySpline . Neste exemplo, a animação começa lentamente e acelera exponencialmente na direção do final do segmento de tempo.

<Canvas Width="400" Height="300">
    <Canvas.Resources>
        <Storyboard x:Name="myStoryboard">

            <!-- Animating the Center property uses 3 KeyFrames, which animate
             the ellipse allong a triangular path. -->
            <PointAnimationUsingKeyFrames
          Storyboard.TargetProperty="Center"
          Storyboard.TargetName="MyAnimatedEllipseGeometry"
          Duration="0:0:5" RepeatBehavior="Forever" EnableDependentAnimation="True">

                <!-- Over the first half second, Using a LinearPointKeyFrame, the ellipse 
               moves steadily from its starting position along the first line of the 
               trianglar path.  -->
                <LinearPointKeyFrame KeyTime="0:0:0.5" Value="100,300" />

                <!-- Using a DiscretePointKeyFrame, the ellipse suddenly changes position
               after the first second of the animation. -->
                <DiscretePointKeyFrame KeyTime="0:0:1" Value="400,300" />

                <!-- Using a SplinePointKeyFrame, the ellipse moves back to its starting
               position. It moves slowly at first and then speeds up. This key frame 
               takes 2 seconds to complete. -->
                <SplinePointKeyFrame KeySpline="0.6,0.0 0.9,0.00" 
                 KeyTime="0:0:3" Value="200,100" />
            </PointAnimationUsingKeyFrames>
        </Storyboard>
    </Canvas.Resources>
    <Path Fill="Blue" Loaded="Start_Animation">
        <Path.Data>

            <!-- Describes an ellipse. -->
            <EllipseGeometry x:Name="MyAnimatedEllipseGeometry"
             Center="200,100" RadiusX="15" RadiusY="15" />
        </Path.Data>
    </Path>
</Canvas>

// Start the animation when the object loads
private void Start_Animation(object sender, RoutedEventArgs e)
{
    myStoryboard.Begin();
}

' Start the animation when the object loads
Private Sub Start_Animation(ByVal sender As Object, ByVal e As EventArgs)
    myStoryboard.Begin()
End Sub

Construtores

Propriedades

Métodos

Eventos

Aplica-se a

Confira também

• Animações com storyboard