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ConvertObjectToLogicalRectangle Method
See Also 
Leadtools.Annotations Namespace > AnnObject Class : ConvertObjectToLogicalRectangle Method



rect
A rectangle in object coordinates.
rect
A rectangle in object coordinates.
Converts a rectangle from object to logical coordinates.

Syntax

Visual Basic (Declaration) 
Public Function ConvertObjectToLogicalRectangle( _
   ByVal rect As AnnRectangle _
) As AnnRectangle
Visual Basic (Usage)Copy Code
Dim instance As AnnObject
Dim rect As AnnRectangle
Dim value As AnnRectangle
 
value = instance.ConvertObjectToLogicalRectangle(rect)
C# 
public AnnRectangle ConvertObjectToLogicalRectangle( 
   AnnRectangle rect
)
C++/CLI 
public:
AnnRectangle ConvertObjectToLogicalRectangle( 
   AnnRectangle rect
) 

Parameters

rect
A rectangle in object coordinates.

Return Value

A rectangle object containing the result in logical coordinates.

Example

For an example, refer to ConvertObjectToLogicalPoints.

Remarks

An AnnObject may contain various points, lines, curves and rectangles that denote the object coordinates and where it should be drawn on an image. Also, the AnnObject contains a System.Drawing.Drawing2D.Matrix object that may be updated with a transformation when the object is moved, rotated or sized. This transformation as well as the container own transformation are used to translate an object point to image coordinates and then to the screen.

The coordinates stored in the object (for example, AnnLineObject.StartPoint or AnnRectangleObject.Bounds are called object coordinates. These coordinates do not translate 1 to 1 to pixel values on the image used in the annotations because of the transformation matrices involved.

The values corresponding to the object coordinates in pixels are called logical coordinates. For example, a logical coordinate of AnnLineObject.StartPoint is its pixel value (in top left-position) in the image it is annotating. Converting from object to logical coordinates is what happens when you call the AnnAutomation.Realize method.

To manipulate an object position and size manually from outside the annotation framework, you need to first convert its coordinates to logical values, perform your own transformations, and convert them back to object coordinates before setting them back to the object.

To convert a point or a group of points from object to logical coordinates, use the ConvertObjectToLogicalPoints method.

To convert a point or a group of points from logical to object coordinates, use the ConvertLogicalToObjectPoints method.

To convert a rectangle from object to logical coordinates, use the ConvertObjectToLogicalRectangle method.

To convert a rectangle from logical to object coordinates, use the ConvertLogicalToObjectRectangle method.

For an example on converting object to logical and back to object coordinates, refer to ConvertLogicalToObjectPoints.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.Annotations requires a Document or Medical toolkit license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features