SizeKeyFrameHierarchy: DependencyObject Freezable

SizeKeyFrame is the base class for three types of Size key frames: discrete, linear, and spline. Each of the three subclasses of SizeKeyFrame represents a key frame with a distinct interpolation technique, indicated by its name:

     <LinearSizeKeyFrame             KeyTime="0:0:10|Uniform|Paced|30%"             Value="1 1" />     <DiscreteSizeKeyFrame             KeyTime="0:0:10|Uniform|Paced|30%"             Value="1 1" />     <SplineSizeKeyFrame             KeyTime="0:0:10|Uniform|Paced|30%"             Value="1 1" >             <SplineSizeKeyFrame.KeySpline>                 <KeySpline ControlPoint1="5,5" ControlPoint2="10,10" />            </SplineSizeKeyFrame.KeySpline>     </SplineSizeKeyFrame> 

All three SizeKeyFrame subclasses determine when (KeyTime) the frame will reach the designated value (Value). KeyTime is specified in terms of hours:minutes:seconds. The Value attribute of all SizeKeyFrame subclasses is a Size.


Skips from one value to the desired value without interpolation. Thus, the Value will not be reached until KeyTime (relative to the beginning of the animation).


Utilizes linear interpolation to reach the desired value. Linear interpolation progresses the animation at a steady rate for its duration.


Uses a concept similar to Bezier curves to interpolate values until Value has been reached. This subclass requires an additional attribute, KeySpline, which is used to interpolate the value in much the same way as control points are used to interpolate a line when declaring a Bezier curve.

The Size value may be specified using abbreviated markup syntax or explicitly declared as a Size element.


KeySpline (required) (SplineSizeKeyFrame only)

This KeySpline describes how the key frame will be altered during animation.

KeyTime (required)

This attribute specifies when, relative to the animation, this key frame takes place:

  • A time period specified in hours:minutes:seconds.

  • Uniform: The Duration will be split evenly among all key frames.

  • Paced: The Duration will be split among key frames in a way that ensures the speed of the animation remains relatively constant.

  • A percentage of the total duration.

Value (required)

This Size describes the destination value of the key frame.

XAML in a Nutshell
XAML in a Nutshell (In a Nutshell (OReilly))
ISBN: 0596526733
EAN: 2147483647
Year: 2007
Pages: 217

Similar book on Amazon © 2008-2017.
If you may any questions please contact us: