IXRDiscreteDoubleKeyFrame (Compact 2013)

Article
04/19/2017

3/28/2014

This class defines an animation segment that uses discrete values to animate from the float value of the previous key frame to its own target float value.

Syntax

class IXRDiscreteDoubleKeyFrame : public IXRDoubleKeyFrame

Inheritance Hierarchy

IXRDependencyObject

IXRDoubleKeyFrame

IXRDiscreteDoubleKeyFrame

Methods

This class defines no new methods. Its methods are inherited from IXRDoubleKeyFrame.

Thread Safety

Members of this class are thread-safe if you previously called IXRApplication::CreateHostFromXaml and supplied it with an XRWindowCreateParams structure that has AllowsMultipleThreadAccess set to true.

Remarks

This class animates a float value along a set of key frames by using an IXRDoubleKeyFrameCollection that belongs to an IXRDoubleAnimationUsingKeyFrames object.

A key frame defines a segment of the IXRDoubleAnimationUsingKeyFrames object that it belongs to. Each key frame has a target float value and a key-time. The key-time specifies the time at which the target value of the key frame is reached. A key frame animates from the target value of the previous key frame to its own target value. It starts when the previous key frame ends, and it ends when its own key-time is reached.

Discrete key frames like IXRDiscreteDoubleKeyFrame do not interpolate between values, instead jumping suddenly to the new target value when the key frame is reached.

When you create a class instance, use an IXRDiscreteDoubleKeyFramePtr smart pointer instead of a raw interface pointer. For more information, see XRPtr<Interface>.

You can also define a discrete double key-frame in Microsoft Silverlight 3 XAML. For information about the differences between XAML in XAML for Windows Embedded and Silverlight 3, see Differences Between Microsoft Silverlight 3 and XAML for Windows Embedded. For more information about how to define this element in the source XAML for your application, see the DiscreteDoubleKeyFrame Class on MSDN.

Note

The name of this XAML element is generated by the Blend for Visual Studio IDE and includes "double" in order to maintain parity with the name of its equivalent XAML element in the source XAML markup. However, in XAML for Windows Embedded this object represents a float instead of a double.

.NET Framework Equivalent

System.Windows.Media.Animation.DiscreteDoubleKeyFrame

Requirements

Header	XamlRuntime.h
sysgen	SYSGEN_XAML_RUNTIME