April 12, 2014
Assembly: System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.
Thetype exposes the following members.
|AutoReverse||Gets or sets a value that indicates whether the timeline plays in reverse after it completes a forward iteration. (Inherited from Timeline.)|
|BeginTime||Gets or sets the time at which this Timeline should begin. (Inherited from Timeline.)|
|Dispatcher||Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)|
|Duration||Gets or sets the length of time for which this timeline plays, not counting repetitions. (Inherited from Timeline.)|
|FillBehavior||Gets or sets a value that specifies how the animation behaves after it reaches the end of its active period. (Inherited from Timeline.)|
|KeyFrames||Gets the collection of ColorKeyFrame objects that define the animation.|
|RepeatBehavior||Gets or sets the repeating behavior of this timeline. (Inherited from Timeline.)|
|SpeedRatio||Gets or sets the rate, relative to its parent, at which time progresses for this Timeline. (Inherited from Timeline.)|
|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 Windows Phone 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.)|
A key frame animation's target values are defined by its KeyFrames property, which contains a collection of ColorKeyFrame objects. Each ColorKeyFrame defines a segment of the animation with its own target Value and KeyTime. When the animation runs, it progresses from one key value to the next at the specified key times.
When declaring a in XAML, the order of the ColorKeyFrame object elements is not significant, because the KeyTime controls the timing and therefore the order in which the key frames are executed. However, it is good markup style to keep the element order the same as the KeyTime sequence order.
During the end of the next half second, DiscreteColorKeyFrame quickly changes the color from red to yellow. Discrete key frames like DiscreteColorKeyFrame create sudden changes between values; the animation occurs quickly and has no interpolation between values at all.
During the final two seconds, SplineColorKeyFrame changes the color again, this time from yellow back to green. Spline key frames like SplineColorKeyFrame create a variable transition between values according to the values of the KeySpline property. A KeySpline provides a way to alter the relationship of time versus value during the animation duration to be nonlinear, and in particular the relationship can be a curve that would be difficult to produce with individual key frames. In this example, the change in color begins slowly and speeds up exponentially toward the end of the time segment.
<StackPanel Background="Transparent" x:Name="myStackPanel" Loaded="Start_Animation"> <StackPanel.Resources> <Storyboard x:Name="colorStoryboard"> <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="myStackPanel" Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"> <!-- Go from green to red in the first 2 seconds. LinearColorKeyFrame creates a smooth, linear animation between values. --> <LinearColorKeyFrame Value="Red" KeyTime="00:00:02" /> <!-- In the next half second, go to yellow. DiscreteColorKeyFrame creates a sudden jump between values. --> <DiscreteColorKeyFrame Value="Yellow" KeyTime="00:00:2.5" /> <!-- In the final 2 seconds of the animation, go from yellow back to green. SplineColorKeyFrame creates a variable transition between values depending on the KeySpline property. In this example, the animation starts off slow but toward the end of the time segment, it speeds up exponentially.--> <SplineColorKeyFrame Value="Green" KeyTime="00:00:4.5" KeySpline="0.6,0.0 0.9,0.00" /> </ColorAnimationUsingKeyFrames> </Storyboard> </StackPanel.Resources> </StackPanel>