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ExponentialEase Class
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Represents an easing function that creates an animation that accelerates and/or decelerates using an exponential formula (see remarks).
Inheritance Hierarchy
System.Object
System.Windows.DependencyObject
System.Windows.Media.Animation.EasingFunctionBase
System.Windows.Media.Animation.ExponentialEase
Namespace: System.Windows.Media.Animation
Assembly: System.Windows (in System.Windows.dll)
Syntax
'Declaration
Public Class ExponentialEase _
Inherits EasingFunctionBase
public class ExponentialEase : EasingFunctionBase
<ExponentialEase .../>
The ExponentialEase type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
| Public methodSupported by Silverlight for Windows Phone | ExponentialEase | Initializes a new instance of the ExponentialEase class. |
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Properties
| Name | Description | |
|---|---|---|
| Public propertySupported by Silverlight for Windows Phone | Dispatcher | Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.) |
| Public propertySupported by Silverlight for Windows Phone | EasingMode | Gets or sets a value that specifies how the animation interpolates. (Inherited from EasingFunctionBase.) |
| Public propertySupported by Silverlight for Windows Phone | Exponent | Gets or sets the exponent used to determine the interpolation of the animation. |
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Methods
| Name | Description | |
|---|---|---|
| Public methodSupported by Silverlight for Windows Phone | CheckAccess | Determines whether the calling thread has access to this object. (Inherited from DependencyObject.) |
| Public methodSupported by Silverlight for Windows Phone | ClearValue | Clears the local value of a dependency property. (Inherited from DependencyObject.) |
| Public methodSupported by Silverlight for Windows Phone | Ease | Transforms normalized time to control the pace of an animation. (Inherited from EasingFunctionBase.) |
| Protected methodSupported by Silverlight for Windows Phone | EaseInCore | Provides 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 methodSupported by Silverlight for Windows Phone | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
| Protected methodSupported by Silverlight for Windows Phone | Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
| Public methodSupported by Silverlight for Windows Phone | GetAnimationBaseValue | Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.) |
| Public methodSupported by Silverlight for Windows Phone | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| Public methodSupported by Silverlight for Windows Phone | GetType | Gets the Type of the current instance. (Inherited from Object.) |
| Public methodSupported by Silverlight for Windows Phone | GetValue | Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.) |
| Protected methodSupported by Silverlight for Windows Phone | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| Public methodSupported by Silverlight for Windows Phone | ReadLocalValue | Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.) |
| Public methodSupported by Silverlight for Windows Phone | SetValue | Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.) |
| Public methodSupported by Silverlight for Windows Phone | ToString | Returns a string that represents the current object. (Inherited from Object.) |
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Fields
| Name | Description | |
|---|---|---|
| Public fieldStatic memberSupported by Silverlight for Windows Phone | ExponentProperty | Identifies the Exponent dependency property. |
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Remarks
You can control whether the animation accelerates, decelerates or both by specifying the EasingMode. The following graph demonstrates the different values of EasingMode where f(t) represents the animation progress and t represents time.
ExponentialEase graphs of different easingmodes.
The formula used for this function is the following.
Mathematical formula for ExponentialEase
Using the formula above, the following graph illustrates the effect of several different values for the Exponent property:
Different values for the Exponent property.
There are several other easing functions besides ExponentialEase which you can explore using the following sample.
In addition to using the easing functions included in the run-time, you can create your own custom easing functions by inheriting from EasingFunctionBase.
Examples
The following example applies a ExponentialEase easing function to a DoubleAnimation to create a decelerating animation.
<StackPanel x:Name="LayoutRoot" Background="White">
<StackPanel.Resources>
<Storyboard x:Name="myStoryboard">
<DoubleAnimation From="30" To="200" Duration="00:00:3"
Storyboard.TargetName="myRectangle"
Storyboard.TargetProperty="Height">
<DoubleAnimation.EasingFunction>
<ExponentialEase Exponent="6" EasingMode="EaseOut"/>
</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 Sub Mouse_Clicked(ByVal sender As Object, ByVal e As MouseEventArgs)
myStoryboard.Begin()
End Sub
// When the user clicks the rectangle, the animation
// begins.
private void Mouse_Clicked(object sender, MouseEventArgs e)
{
myStoryboard.Begin();
}
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.