Articolo
11/17/2011

DoubleKeyFrame Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

An abstract class that defines an animation segment with its own target value and interpolation method for a DoubleAnimationUsingKeyFrames.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.Media.Animation.DoubleKeyFrame
      System.Windows.Media.Animation.DiscreteDoubleKeyFrame
      System.Windows.Media.Animation.EasingDoubleKeyFrame
      System.Windows.Media.Animation.LinearDoubleKeyFrame
      System.Windows.Media.Animation.SplineDoubleKeyFrame

Namespace: System.Windows.Media.Animation
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public MustInherit Class DoubleKeyFrame _
    Inherits DependencyObject

public abstract class DoubleKeyFrame : DependencyObject

The DoubleKeyFrame type exposes the following members.

Constructors

	Name	Description
	DoubleKeyFrame	Initializes a new instance of the DoubleKeyFrame class.

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Properties

	Name	Description
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	KeyTime	Gets or sets the time at which the key frame's target Value should be reached.
	Value	Gets or sets the key frame's target value.

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	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.)
	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.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Fields

	Name	Description
	KeyTimeProperty	Identifies the KeyTime dependency property.
	ValueProperty	Identifies the Value dependency property.

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Remarks

DoubleKeyFrame is an abstract class that defines Double value type key frames for several different techniques of key frame animation: DiscreteDoubleKeyFrame, EasingDoubleKeyFrame, LinearDoubleKeyFrame, SplineDoubleKeyFrame. To animate a Double with key frames, you define a DoubleAnimationUsingKeyFrames animation, and populate its KeyFrames property with one or more DiscreteDoubleKeyFrame, EasingDoubleKeyFrame, LinearDoubleKeyFrame, or SplineDoubleKeyFrame elements that define the key frames.

For more information, see the following DoubleKeyFrame derived objects: DiscreteDoubleKeyFrame, EasingDoubleKeyFrame, LinearDoubleKeyFrame, SplineDoubleKeyFrame.

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.

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