EasingPointKeyFrame Class

Reference

Definition

Namespace:: Microsoft.UI.Xaml.Media.Animation

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Associates an easing function with a PointAnimationUsingKeyFrames key-frame animation.

public ref class EasingPointKeyFrame sealed : PointKeyFrame

/// [Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.WinUIContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class EasingPointKeyFrame final : PointKeyFrame

[Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.WinUIContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class EasingPointKeyFrame : PointKeyFrame

Public NotInheritable Class EasingPointKeyFrame
Inherits PointKeyFrame

<EasingPointKeyFrame .../>

Inheritance: Object Platform::Object IInspectable DependencyObject PointKeyFrame EasingPointKeyFrame

Attributes: ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Examples

This XAML example shows how to use key frames that have easing functions associated with them to create an animation that simulates an oval going up in the air and falling back down, where it bounces to a stop.

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

            <PointAnimationUsingKeyFrames
             Storyboard.TargetProperty="Center"
             Storyboard.TargetName="MyAnimatedEllipseGeometry"
             EnableDependentAnimation="True">

                <!-- This keyframe animates the ellipse up to the crest 
                     where it slows down and stops. -->
                <EasingPointKeyFrame Value="50,20" KeyTime="00:00:02">
                    <EasingPointKeyFrame.EasingFunction>
                        <CubicEase EasingMode="EaseOut"/>
                    </EasingPointKeyFrame.EasingFunction>
                </EasingPointKeyFrame>
                
                <!-- This keyframe animates the ellipse back down and makes
                     it bounce. -->
                <EasingPointKeyFrame Value="50,200" KeyTime="00:00:06">
                    <EasingPointKeyFrame.EasingFunction>
                        <BounceEase Bounces="5" EasingMode="EaseOut"/>
                    </EasingPointKeyFrame.EasingFunction>
                </EasingPointKeyFrame>

            </PointAnimationUsingKeyFrames>
        </Storyboard>
    </Canvas.Resources>
    <Path PointerPressed="Pointer_Clicked" Fill="Blue">
        <Path.Data>

            <!-- Describes an ellipse. -->
            <EllipseGeometry x:Name="MyAnimatedEllipseGeometry"
             Center="50,200" RadiusX="15" RadiusY="15" />
        </Path.Data>
    </Path>
</Canvas>

// When the user clicks the ellipse, the animation
// begins. 
private void Pointer_Clicked(object sender, PointerRoutedEventArgs e)
{
    myStoryboard.Begin();
}

Remarks

Easing functions allow you to apply custom mathematical formulas to your animations. Mathematical operations are often useful to produce animations that simulate real-world physics in a 2-D coordinate system. For example, you may want an object to realistically bounce or behave as though it were on a spring. For a list of easing functions and info on how to use them, see Key-frame animations and easing function animations.

Constructors

EasingPointKeyFrame()

Initializes a new instance of the EasingPointKeyFrame class.

Properties

Dispatcher	Always returns `null` in a Windows App SDK app. Use DispatcherQueue instead. (Inherited from DependencyObject)
DispatcherQueue	Gets the `DispatcherQueue` that this object is associated with. The `DispatcherQueue` represents a facility that can access the `DependencyObject` on the UI thread even if the code is initiated by a non-UI thread. (Inherited from DependencyObject)
EasingFunction	Gets or sets the easing function that is applied to the key frame.
EasingFunctionProperty	Identifies the EasingFunction dependency property.
KeyTime	Gets or sets the time at which the key frame's target Value should be reached. (Inherited from PointKeyFrame)
Value	Gets or sets the key frame's target value. (Inherited from PointKeyFrame)

Methods

ClearValue(DependencyProperty)	Clears the local value of a dependency property. (Inherited from DependencyObject)
GetAnimationBaseValue(DependencyProperty)	Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject)
GetValue(DependencyProperty)	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance. (Inherited from DependencyObject)
SetValue(DependencyProperty, Object)	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback. (Inherited from DependencyObject)

Applies to

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