LAnnotation::GetROP2

#include "ltwrappr.h"

virtual L_UINT LAnnotation::GetROP2()

Gets a constant that indicates which binary raster operation (ROP2) code is being used for one or more objects.

Returns

The ROP2 code. Possible values are:

Value

Meaning

ANNROP2_COPY

[0x0000] Draw the object using the object's color

ANNROP2_AND

[0x0001] Draw the object, performing an AND operation between the object's color and the background color. This creates a highlight effect. White objects become transparent.

ANNROP2_XOR

[0x0002] Draw the object, performing an XOR operation between the object's color and the background color. This creates an inverted effect. Black objects become transparent.

Default is ANNROP2_COPY.

Comments

The ROP2 codes specify how pen or brush colors are to be combined with the colors in the image.

The LAnnotation::GetROP2 function is valid only for the following object types:

Crossproduct

Curve

Closed Curve

Ellipse

Freehand

Freehand Hotspot

Line

Pointer

Point

Polygon

Polyline

Polyruler

Protractor

Rectangle

Ruler

Stamp (including the Rubber Stamp)

TextPointer

In addition, the Automation object stores ROP2 settings along with the other object default settings

If you try to use the LAnnotation::GetROP2 function with an object that does not support it, the method returns Error (-16), which is "Feature not supported".

Call the LAnnotation::SetROP2 function to set the ROP2 code being used for one or more annotation objects.

Required DLLs and Libraries

LTANN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:

Class Members, LAnnAutomation::SetAutoHilightPen, LAnnotation::GetFillMode, LAnnotation::SetFillMode, LAnnotation::GetOptions, LAnnotation::SetOptions, LAnnAutomation::GetAutoHilightPen

Topics:

Annotation Functions: Displaying Annotations

 

Displaying and Manipulating Annotation Objects

Example

L_INT LAnnotation_GetROP2Example(LAnnotation& LeadAnn) 
{ 
   L_INT nRet =SUCCESS; 
   L_UINT uRop2; // ROP2 code  
 
   // Get the current ROP2 code  
   uRop2 = LeadAnn.GetROP2(); 
 
   // if the code is not ANNROP2_AND, make it so 
   if(uRop2 != ANNROP2_AND) 
      nRet = LeadAnn.SetROP2( nRet = ANNROP2_AND, ANNFLAG_RECURSE); // set ROP2 code  
 
   return nRet; 
 
} 
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