ObjectAnimationBase Class
.NET Framework 3.0
Abstract class that, when implemented, animates a Object value.
Namespace: System.Windows.Media.Animation
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
Notes to Inheritors:
See the Custom Animations Overview for information about extending animation classes.
The following code example demonstrates how to use the derived ObjectAnimationUsingKeyFrames class in Extensible Application Markup Language (XAML).
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <Page.Triggers> <EventTrigger RoutedEvent="Page.Loaded"> <BeginStoryboard> <Storyboard> <!-- ObjectAnimationUsingKeyFrames is used to animate properties that take an object as a value. This animation lasts for 4 seconds using 3 KeyFrames which swap different brush objects at regular intervals, making the background of the Page change. --> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Duration="0:0:4" RepeatBehavior="Forever"> <ObjectAnimationUsingKeyFrames.KeyFrames> <!-- Note: Only discrete interpolation (DiscreteObjectKeyFrame) is available for use with ObjectAnimationUsingKeyFrames which merely swaps objects according to a specified timeline. Other types of interpolation are too problematic to apply to objects. --> <!-- Using a DiscreteObjectKeyFrame, the Page Background suddenly changes to a LinearGradientBrush after the first second of the animation. --> <DiscreteObjectKeyFrame KeyTime="0:0:1"> <DiscreteObjectKeyFrame.Value> <LinearGradientBrush> <LinearGradientBrush.GradientStops> <GradientStop Color="Yellow" Offset="0.0" /> <GradientStop Color="Orange" Offset="0.5" /> <GradientStop Color="Red" Offset="1.0" /> </LinearGradientBrush.GradientStops> </LinearGradientBrush> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> <!-- Using a DiscreteObjectKeyFrame, the Page Background suddenly changes to a RadialGradientBrush after the second second of the animation. --> <DiscreteObjectKeyFrame KeyTime="0:0:2"> <DiscreteObjectKeyFrame.Value> <RadialGradientBrush GradientOrigin="0.75,0.25"> <RadialGradientBrush.GradientStops> <GradientStop Color="White" Offset="0.0" /> <GradientStop Color="MediumBlue" Offset="0.5" /> <GradientStop Color="Black" Offset="1.0" /> </RadialGradientBrush.GradientStops> </RadialGradientBrush> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> <!-- Using a DiscreteObjectKeyFrame, the Page Background suddenly changes to a DrawingBrush (creates a checkerboard pattern) after the third second of the animation. --> <DiscreteObjectKeyFrame KeyTime="0:0:3"> <DiscreteObjectKeyFrame.Value> <DrawingBrush Viewport="0,0,0.25,0.25" TileMode="Tile"> <DrawingBrush.Drawing> <DrawingGroup> <DrawingGroup.Children> <GeometryDrawing Brush="White"> <GeometryDrawing.Geometry> <RectangleGeometry Rect="0,0,1,1" /> </GeometryDrawing.Geometry> </GeometryDrawing> <GeometryDrawing Brush="Black" Geometry="M 0,0 L0,0.5 0.5,0.5 0.5,1 1,1 1,0.5 0.5,0.5 0.5,0" /> </DrawingGroup.Children> </DrawingGroup> </DrawingBrush.Drawing> </DrawingBrush> </DiscreteObjectKeyFrame.Value> </DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames.KeyFrames> </ObjectAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> </Page.Triggers> </Page>
System.Object
System.Windows.Threading.DispatcherObject
System.Windows.DependencyObject
System.Windows.Freezable
System.Windows.Media.Animation.Animatable
System.Windows.Media.Animation.Timeline
System.Windows.Media.Animation.AnimationTimeline
System.Windows.Media.Animation.ObjectAnimationBase
System.Windows.Media.Animation.ObjectAnimationUsingKeyFrames
System.Windows.Threading.DispatcherObject
System.Windows.DependencyObject
System.Windows.Freezable
System.Windows.Media.Animation.Animatable
System.Windows.Media.Animation.Timeline
System.Windows.Media.Animation.AnimationTimeline
System.Windows.Media.Animation.ObjectAnimationBase
System.Windows.Media.Animation.ObjectAnimationUsingKeyFrames
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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