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ObjectAnimationBase Class

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

public abstract class ObjectAnimationBase : AnimationTimeline
public abstract class ObjectAnimationBase extends AnimationTimeline
public abstract class ObjectAnimationBase extends AnimationTimeline
This class is abstract; see Inheritance Hierarchy for derived non-abstract classes usable in XAML.

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>

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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.

.NET Framework

Supported in: 3.0

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