Stroke.GetBoundingBox Method ()

Artículo
12/12/2007

Returns the bounding Rectangle that defines the bounding box for the Stroke object.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in microsoft.ink.dll)

Syntax

'Declaration
Public Function GetBoundingBox As Rectangle
'Usage
Dim instance As Stroke
Dim returnValue As Rectangle

returnValue = instance.GetBoundingBox

public Rectangle GetBoundingBox ()

public:
Rectangle GetBoundingBox ()

public Rectangle GetBoundingBox ()

public function GetBoundingBox () : Rectangle

Not applicable.

Remarks

The bounding Rectangle is in ink space coordinates.

The bounding Rectangle corresponds to the portion of the display to invalidate or redraw when displaying a Stroke object.

When the bounding box is affected by the pen width, then this width is scaled appropriately for the Renderer object's view transform. To do this, the pen width is multiplied by the square root of the determinant of the view transform.

Note

If you have not set the pen width explicitly, it is 53 by default. You must multiply the pen width by the square root of the determinant to yield the correct bounding box. The height and width of the bounding box are expanded by half this amount in each direction. For example, consider that the pen width is 53, the square root of the determinant is 50, and the bounding box is (0, 0, 1000, 1000). The pen width adjustment to the bounding box in each direction is calculated as (53 * 50) / 2, and the right and bottom sides are incremented by one. This results in a rendered bounding box of (-1325, -1325, 2326, 2326).

Note

The bounding Rectangle that this method returns is a copy of the bounding box of the Stroke object. Altering the Rectangle that this method returns has no affect on the bounding box of the original Stroke object.

Example

This C# example gets the bounding box from a Stroke object, theStroke.

Rectangle theBoundingBox = theStroke.GetBoundingBox();

This Microsoft® Visual Basic® .NET example gets the bounding box from a Stroke object, theStroke.

Dim theBoundingBox As Rectangle = theStroke.GetBoundingBox()

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

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