ThicknessAnimationUsingKeyFrames.KeyFrames Property
Gets or sets the collection of ThicknessKeyFrame objects that define the animation.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
'Declaration Public Property KeyFrames As ThicknessKeyFrameCollection 'Usage Dim instance As ThicknessAnimationUsingKeyFrames Dim value As ThicknessKeyFrameCollection value = instance.KeyFrames instance.KeyFrames = value
<object> <ThicknessKeyFrameCollection .../> </object>
Property Value
Type: System.Windows.Media.Animation.ThicknessKeyFrameCollectionThe collection of ThicknessKeyFrame objects that define the animation. The default value is Empty.
This example shows how to animate the BorderThickness property of a Border.
The following example uses the ThicknessAnimationUsingKeyFrames class to animate the BorderThickness property of a Border. This animation uses three key frames in the following manner:
During the first half second, uses an instance of the LinearThicknessKeyFrame class to gradually increase the thickness of the border. The example uses LinearThicknessKeyFrame to create a smooth linear increase between values.
At the end of the next half second, uses an instance of the DiscreteThicknessKeyFrame class to suddenly increase the thickness of the border. Discrete key frames like those derived from DiscreteThicknessKeyFrame create sudden jumps between values, that is, the movement of the animation is jerky.
During the final two seconds, uses an instance of the SplineThicknessKeyFrame class to decrease the thickness of the border. Spline key frames like those derived from SplineThicknessKeyFrame create a variable transition between values according to the values of the KeySpline property. In this key frame, the animation starts off slow and speeds up exponentially toward the end of the time segment.
<!-- This example shows how to use the ThicknessAnimationUsingKeyFrames to create an animation on the BorderThickness property of a Border. --> <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Microsoft.Samples.KeyFrameExamples.ThicknessAnimationUsingKeyFramesExample" Name="myRootElement" WindowTitle="ThicknessAnimationUsingKeyFrames Example"> <StackPanel Orientation="Vertical" HorizontalAlignment="Center"> <Border Background="#99FFFFFF" BorderBrush="#CCCCFF" BorderThickness="1" Margin="0,60,0,20" Padding="20" > <Border.Triggers> <EventTrigger RoutedEvent="Border.Loaded"> <BeginStoryboard> <Storyboard> <!-- Animating the BorderThickness property uses 3 KeyFrames. --> <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="BorderThickness" Duration="0:0:5" FillBehavior="HoldEnd" RepeatBehavior="Forever"> <ThicknessAnimationUsingKeyFrames.KeyFrames> <!-- Using a LinearThicknessKeyFrame, thickness increases gradually over the first half second of the animation. --> <LinearThicknessKeyFrame KeyTime="0:0:0.5"> <LinearThicknessKeyFrame.Value> <Thickness Left="8" Right="8" Top="6" Bottom="6" /> </LinearThicknessKeyFrame.Value> </LinearThicknessKeyFrame> <!-- Using a DiscreteThicknessKeyFrame, thickness increases suddenly after the first second of the animation. --> <DiscreteThicknessKeyFrame KeyTime="0:0:1"> <DiscreteThicknessKeyFrame.Value> <Thickness Left="28" Right="28" Top="24" Bottom="24" /> </DiscreteThicknessKeyFrame.Value> </DiscreteThicknessKeyFrame> <!-- Using a SplineThicknessKeyFrame, thickness decreases slowly at first and then suddenly contracts. This KeyFrame takes 2 seconds. --> <SplineThicknessKeyFrame KeySpline="0.6,0.0 0.9,0.00" KeyTime="0:0:3"> <SplineThicknessKeyFrame.Value> <Thickness Left="1" Right="1" Top="1" Bottom="8" /> </SplineThicknessKeyFrame.Value> </SplineThicknessKeyFrame> </ThicknessAnimationUsingKeyFrames.KeyFrames> </ThicknessAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> </Border.Triggers> <TextBlock> This example shows how to use the ThicknessAnimationUsingKeyFrames to create an animation on the BorderThickness property of a Border. </TextBlock> </Border> </StackPanel> </Page>
For the complete sample, see KeyFrame Animation Sample.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.