Export (0) Print
Expand All

BooleanKeyFrameCollection Class

Represents a collection of BooleanKeyFrame objects.

Namespace: System.Windows.Media.Animation
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public class BooleanKeyFrameCollection : Freezable, IList, ICollection, IEnumerable
public class BooleanKeyFrameCollection extends Freezable implements IList, ICollection, 
	IEnumerable
public class BooleanKeyFrameCollection extends Freezable implements IList, ICollection, 
	IEnumerable
<BooleanKeyFrameCollection .../>
<object>
  <object.property>
    oneOrMoreBooleanKeyFrames
  </object.property>
</object>
 oneOrMoreBooleanKeyFrames  One or more BooleanKeyFrame objects, declared using object element syntax. 

This collection is used as part of a BooleanAnimationUsingKeyFrames to animate a Boolean property value along a set of key frames.

The following example demonstrates how to use a BooleanAnimationUsingKeyFrames animation.

<!-- Demonstrates a BooleanAnimationUsingKeyFrames. The animation is used to
     animate the IsEnabled property of a button. -->
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="Microsoft.Samples.KeyFrameAnimations.BooleanAnimationUsingKeyFramesExample"
  Name="myRootElement"
  WindowTitle="KeyFrameBoolean Animation Example">


  <StackPanel Orientation="Vertical" Margin="20">
  
    <TextBlock>
        Click the button to animate the its IsEnabled property with a 
        BooleanAnimationUsingKeyFrames animation.
    </TextBlock>
  
    <Button Name="myAnimatedButton" Margin="200">Click Me
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <BeginStoryboard>
            <Storyboard>
              <BooleanAnimationUsingKeyFrames 
                Storyboard.TargetName="myAnimatedButton" Storyboard.TargetProperty="(Button.IsEnabled)"
                Duration="0:0:4" FillBehavior="HoldEnd">

                <!-- All the key frames below are DiscreteBooleanKeyFrames. Discrete key frames create 
                sudden "jumps" between values (no interpolation). Only discrete key frames can be used 
                for Boolean key frame animations. -->
                <DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:0" />
                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:1" />
                <DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:2" />
                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:3" />
                <DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:3.5" />
                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:4" />
              </BooleanAnimationUsingKeyFrames>            
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>
      </Button.Triggers>
    </Button>
  </StackPanel>
</Page>

System.Object
   System.Windows.Threading.DispatcherObject
     System.Windows.DependencyObject
       System.Windows.Freezable
        System.Windows.Media.Animation.BooleanKeyFrameCollection

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

Community Additions

ADD
Show:
© 2014 Microsoft