MatrixAnimationUsingPath.IsAdditive 属性

定义

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

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

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。

适用于