Public Sub SetRegion( _
   ByVal xform As RasterRegionXForm, _
   ByVal region As RasterRegion, _
   ByVal combineMode As RasterRegionCombineMode _
) 

Visual Basic (Usage)	Copy Code
Dim instance As RasterImage Dim xform As RasterRegionXForm Dim region As RasterRegion Dim combineMode As RasterRegionCombineMode   instance.SetRegion(xform, region, combineMode)

public void SetRegion( 
   RasterRegionXForm xform,
   RasterRegion region,
   RasterRegionCombineMode combineMode
)

public:
void SetRegion( 
   RasterRegionXForm^ xform,
   RasterRegion^ region,
   RasterRegionCombineMode combineMode
) 

Parameters

xform

RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates. If you specify null (Nothing in Visual Basic) for this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.

region

A RasterRegion object to set or update into this RasterImage. If this parameter is an empty region or null (Nothing in Visual Basic), then the current region in the image will be deleted (this is the equivalant of calling MakeRegionEmpty.

combineMode

The action to take regarding the existing image region, if one is defined.

To get the RasterRegion object that describes the current image region, use GetRegion.

To update an existing region, you specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to RasterRegionCombineMode.

The RasterRegion class provides a platform independent representation of a region of interest in an image that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, WPF and Silverlight. The RasterRegion class contains extensive methods and properties to manipulate the region data and save/load it to a byte array.

To convert a LEADTOOLS RasterRegion object to/from a device dependent region, you can use the following helper classes:

• Leadtools.Drawing.RasterRegionConverter to convert to/from a System.Drawing (GDI+) System.Drawing.Region or Windows HRGN objects.
• Leadtools.Windows.Media.RasterRegionConverter to convert to/from a WPF and Silverlight System.Windows.Media.Geometry object.

The RasterRegion class implements the System.IDisposable interface, so you must call System.IDisposable.Dispose on any region objects you create after using it.

For more information, refer to Creating a Region.

For more information, refer to Saving A Region.

For more information, refer to Working with the Existing Region.

Target Platforms: Silverlight, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only), Windows Phone 7

Reference