GradientBrush.MappingMode 属性

定义

获取或设置一个 BrushMappingMode 枚举,该枚举指定渐变画笔定位坐标是绝对的还是相对于输出区的。Gets or sets a BrushMappingMode enumeration that specifies whether the gradient brush's positioning coordinates are absolute or relative to the output area.

public:
 property System::Windows::Media::BrushMappingMode MappingMode { System::Windows::Media::BrushMappingMode get(); void set(System::Windows::Media::BrushMappingMode value); };
public System.Windows.Media.BrushMappingMode MappingMode { get; set; }
member this.MappingMode : System.Windows.Media.BrushMappingMode with get, set
Public Property MappingMode As BrushMappingMode

属性值

一个 BrushMappingMode 值,该值指定渐变画笔的定位坐标的解释方式。A BrushMappingMode value that specifies how the gradient brush's positioning coordinates are interpreted. 默认值为 RelativeToBoundingBoxThe default is RelativeToBoundingBox.

示例

下面的示例演示如何使用MappingMode属性来指定要StartPoint用于渐变的和EndPoint的坐标系。The following example shows how to use the MappingMode property to specify what coordinate system to use for the StartPoint and EndPoint of the gradient.

<Page 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <StackPanel>

    <!-- Both of the rectangles below have identical gradients applied but use different
         coordinate systems to specify the StartPoint and EndPoint of the gradient. -->
    <Rectangle Width="200" Height="100" Margin="10">
      <Rectangle.Fill>

        <!-- The MappingMode property is set to "Absolute" which specifies that the coordinate 
             system used for the StartPoint and EndPoint properties is not relative to the 
             Brush output area. Values are interpreted directly in local space (in pixels). -->
        <LinearGradientBrush MappingMode="Absolute" 
            StartPoint="0,50" EndPoint="200,50">
          <GradientStop Color="Yellow" Offset="0" />
          <GradientStop Color="Red" Offset="0.25" />
          <GradientStop Color="Blue" Offset="0.75" />
          <GradientStop Color="LimeGreen" Offset="1" />
        </LinearGradientBrush>
      </Rectangle.Fill>
    </Rectangle>

    <Rectangle Width="200" Height="100" Margin="10">
      <Rectangle.Fill>

        <!-- The MappingMode property is set to "RelativeToBoundingBox" (default) which  
             specifies the coordinate system for the StartPoint and EndPoint are relative to 
             the Brush output area: 0 indicates 0 percent of the output area and 1 indicates 
             100 percent of the output area.  -->
        <LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
          <GradientStop Color="Yellow" Offset="0" />
          <GradientStop Color="Red" Offset="0.25" />
          <GradientStop Color="Blue" Offset="0.75" />
          <GradientStop Color="LimeGreen" Offset="1" />
        </LinearGradientBrush>
      </Rectangle.Fill>
    </Rectangle>

  </StackPanel>
</Page>

注解

值为Absolute指示渐变画笔的坐标使用与设备无关的像素表示。A value of Absolute indicates the gradient brush's coordinates are expressed using device independent pixels.

依赖项属性信息Dependency Property Information

标识符字段Identifier field MappingModeProperty
元数据属性设置为trueMetadata properties set to true NoneNone

适用于