StylusPlugIn.ElementBounds 属性

定义

命名空间:

System.Windows.Input.StylusPlugIns

程序集:

PresentationCore.dll

获取元素的缓存边界。

public:
 property System::Windows::Rect ElementBounds { System::Windows::Rect get(); };

public System.Windows.Rect ElementBounds { get; }

member this.ElementBounds : System.Windows.Rect

Public ReadOnly Property ElementBounds As Rect

属性值

Rect

元素的缓存边界。

示例

下面的示例演示继承自 StylusPlugInImageBrush 的 如何使用 DynamicRenderer来呈现笔划。 此画笔部分绘制指定的 imageFile图像文件。

if (imageBrush == null)
{
    // Create an ImageBrush.  imageFile is a string that's a path to an image file.
    image1 = new BitmapImage(new Uri(imageFile));
    imageBrush = new ImageBrush(image1);

    // Don't tile, don't stretch; align to top/left.
    imageBrush.TileMode = TileMode.None;
    imageBrush.Stretch = Stretch.None;
    imageBrush.AlignmentX = AlignmentX.Left;
    imageBrush.AlignmentY = AlignmentY.Top;

    // Map the brush to the entire bounds of the element.
    imageBrush.ViewportUnits = BrushMappingMode.Absolute;
    imageBrush.Viewport = this.ElementBounds;
    imageBrush.Freeze();
}

If imageBrush Is Nothing Then
    ' Create an ImageBrush.  imageFile is a string that's a path to an image file.
    image1 = New BitmapImage(New Uri(imageFile))
    imageBrush = New ImageBrush(image1)
    
    ' Don't tile, don't stretch; align to top/left.
    imageBrush.TileMode = TileMode.None
    imageBrush.Stretch = Stretch.None
    imageBrush.AlignmentX = AlignmentX.Left
    imageBrush.AlignmentY = AlignmentY.Top
    
    ' Map the brush to the entire bounds of the element.
    imageBrush.ViewportUnits = BrushMappingMode.Absolute
    imageBrush.Viewport = ElementBounds
    imageBrush.Freeze()
End If

注解

缓存 StylusPlugIn 其元素的边界以执行命中测试。