BounceEase Class

July 28, 2014

Represents an easing function that creates an animated bouncing effect.

Namespace:  System.Windows.Media.Animation
Assembly:  System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.

public class BounceEase : EasingFunctionBase
<BounceEase .../>

The BounceEase type exposes the following members.

  NameDescription
Public methodBounceEaseInitializes a new instance of the BounceEase class.
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  NameDescription
Public propertyBouncesGets or sets the number of bounces.
Public propertyBouncinessGets or sets a value that specifies how bouncy the bounce animation is. Low values of this property result in bounces with little lose of height between bounces (more bouncy) while high values result in dampened bounces (less bouncy).
Public propertyDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertyEasingModeGets or sets a value that specifies how the animation interpolates. (Inherited from EasingFunctionBase.)
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  NameDescription
Public methodCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodEaseTransforms normalized time to control the pace of an animation. (Inherited from EasingFunctionBase.)
Protected methodEaseInCoreProvides the logic portion of the easing function that you can override to produce the EaseIn mode of the custom easing function. (Overrides EasingFunctionBase.EaseInCore(Double).)
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetAnimationBaseValueReturns any base value established for a Windows Phone dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberBouncesPropertyIdentifies the Bounces dependency property.
Public fieldStatic memberBouncinessPropertyIdentifies the Bounciness dependency property.
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The following graph demonstrates BounceEase using different values of EasingMode, where f(t) represents the animation progress and t represents time.

BounceEase EasingMode graphs.

You can specify how many bounces occur using the Bounces property and specify how bouncy (how elastic the bounces are) using the Bounciness property.

In addition to using the easing functions included in the run-time, you can create your own custom easing functions by inheriting from EasingFunctionBase.

The following example applies a BounceEase easing function to a DoubleAnimation to create a bouncing effect.


<StackPanel x:Name="LayoutRoot" Background="Transparent">
    <StackPanel.Resources>
        <Storyboard x:Name="myStoryboard">
            <DoubleAnimation From="30" To="200" Duration="00:00:3" 
                Storyboard.TargetName="myRectangle" 
                Storyboard.TargetProperty="Height">
                <DoubleAnimation.EasingFunction>
                    <BounceEase Bounces="2" EasingMode="EaseOut" 
                                Bounciness="2" />
                </DoubleAnimation.EasingFunction>
            </DoubleAnimation>
        </Storyboard>
    </StackPanel.Resources>

    <Rectangle x:Name="myRectangle" MouseLeftButtonDown="Mouse_Clicked" 
     Fill="Blue" Width="200" Height="30" />

</StackPanel>



// When the user clicks the rectangle, the animation
// begins. 
private void Mouse_Clicked(object sender, MouseEventArgs e)
{
    myStoryboard.Begin();
}


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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