MatrixAnimationUsingPath.IsAdditive 属性

定义

命名空间:

System.Windows.Media.Animation

程序集:

PresentationCore.dll

获取或设置一个值，该值指示是否应将目标属性的当前值添加到此动画的起始值。

public:
 property bool IsAdditive { bool get(); void set(bool value); };

public bool IsAdditive { get; set; }

member this.IsAdditive : bool with get, set

Public Property IsAdditive As Boolean

属性值

Boolean

如果应将目标属性的当前值添加到此动画的起始值，则为 true；否则为 false。 默认值为 false。

示例

以下示例使用两个类似的 MatrixAnimationUsingPath 动画对同一矩形进行动画处理。 第一个动画的 IsAdditive 属性设置为 false，因此它始终从动画的起始值 (0，0) 对矩形进行动画处理。 第二个动画具有相同的目标值， (它们的 PathGeometry 设置) 相同，但其 IsAdditive 属性设置为 true;因此，它从应用动画时位于的任何位置对矩形进行动画处理。

<Page 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
  xmlns:PresentationOptions="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" 
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  mc:Ignorable="PresentationOptions">
  <StackPanel>
      
    <!-- The Rectangle that is animated across the screen by animating
         the MatrixTransform applied to the button. -->
    <Rectangle 
      Width="50" Height="20"
      Fill="Blue"
      HorizontalAlignment="Left"
      VerticalAlignment="Top">
      <Rectangle.RenderTransform>
        <MatrixTransform x:Name="myMatrixTransform">
          <MatrixTransform.Matrix >
            <Matrix OffsetX="10" OffsetY="100"/>
          </MatrixTransform.Matrix>
        </MatrixTransform>
      </Rectangle.RenderTransform>
    </Rectangle>
    
    <StackPanel Margin="0,200,0,0" Orientation="Horizontal">
    <Button Content="Animate with IsAdditive set to False"
      HorizontalAlignment="Left" Padding="5">
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <BeginStoryboard>
            <Storyboard>
            
              <!-- This animation always moves the 
                   rectangle back to (0,0). -->
              <MatrixAnimationUsingPath
                Storyboard.TargetName="myMatrixTransform"
                Storyboard.TargetProperty="Matrix"
                Duration="0:0:2" 
                DoesRotateWithTangent="True" 
                IsAdditive="False">
                <MatrixAnimationUsingPath.PathGeometry>
                  <PathGeometry 
                    Figures="M 0,0 C 35,0 135,0 160,100 180,190 285,200 310,100" />
                </MatrixAnimationUsingPath.PathGeometry>
              </MatrixAnimationUsingPath>
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>
      </Button.Triggers>   
    </Button>
    
     <Button Content="Animate with IsAdditive set to True"
      HorizontalAlignment="Left" 
      Padding="5">
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <BeginStoryboard>
            <Storyboard>
            
              <!-- This animation moves the rectangle from 
                   its current position. -->
              <MatrixAnimationUsingPath
                Storyboard.TargetName="myMatrixTransform"
                Storyboard.TargetProperty="Matrix"
                Duration="0:0:2" 
                DoesRotateWithTangent="True"
                IsAdditive="True">
                <MatrixAnimationUsingPath.PathGeometry>
                  <PathGeometry 
                    Figures="M 0,0 C 35,0 135,0 160,100 180,190 285,200 310,100" />
                </MatrixAnimationUsingPath.PathGeometry>
              </MatrixAnimationUsingPath>
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>
      </Button.Triggers>   
    </Button>   
    </StackPanel>
    
    
  </StackPanel>
</Page>

注解

依赖项属性信息

标识符字段	IsAdditiveProperty
元数据属性设置为 true	无

注意

此依赖属性异常，因为它的标识符字段来自 AnimationTimeline ，并由各种派生类共享。