GradientBrush.MappingMode Property

Reference

Definition

Namespace:: System.Windows.Media

Assembly:: PresentationCore.dll

Important

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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

Property Value

BrushMappingMode

A BrushMappingMode value that specifies how the gradient brush's positioning coordinates are interpreted. The default is RelativeToBoundingBox.

Examples

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>

Remarks

A value of Absolute indicates the gradient brush's coordinates are expressed using device independent pixels.

Dependency Property Information

Item	Value
Identifier field	MappingModeProperty
Metadata properties set to `true`	None

Applies to

通过