ImageGear for .NET
GetImageLayout Method
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ImageGear21.Twain Assembly > ImageGear.TWAIN Namespace > ImGearTWAIN Class : GetImageLayout Method




Glossary Item Box

Gets the image layout of the selected TWAIN device.

Syntax

 
Visual Basic
C#
Managed Extensions for C++
C++/CLI
 
 

Return Value

ImageGear.Core.ImGearDoubleRectangle that represents the physical bounding box of the region to be acquired.

Note: Use only the Left, Top, Right, and Bottom properties of the return value.

Exceptions

ExceptionDescription
ImageGear.Core.ImGearException Thrown if this method is called while there is not an open connection with a Data Source.

Remarks

Prior to calling this method:

  • Call OpenSource to select the desired Data Source.
  • Set the ICAP_UNITS capability, if inches (default) is not the desired unit of measure for the returned bounding box.

Note: Only the Left, Top, Right and Bottom properties of the returned ImageGear.Core.ImGearDoubleRectangle should be used. The Width and Height properties should not be used, because they assume endpoint-inclusive semantics. Using endpoint-inclusive semantics, a rectangle with left, top, right, and bottom coordinates all equal to 0 is one pixel wide and one pixel tall. So, for example, the Width property is calculated as Right - Left + 1. This is not appropriate for a TWAIN image layout rectangle.

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