#include "ltwrappr.h"

L_INT LImageViewerCell::AnnToRgn(nSubCellIndex, uCombineMode, bDeleteAnn, uFlags)

Converts a selected annotation object inside a specific cell or sub-cell into a region, this region will be either set or combined with another existing region.


L_INT nSubCellIndex

A zero-based index into the image list attached to the cell. This image contains the annotation object that the user chooses to convert into region. Pass -1 to apply this effect on all sub-cells. Pass -2 to apply this effect on the selected sub-cell.

L_UINT uCombineMode

Value that specifies the action to apply on the existing bitmap region, if one is defined. For descriptions of the possible values, refer to Creating a Bitmap Region Inside the Image Viewer.

L_BOOL bDeleteAnn

Flag that indicates whether to delete the annotation object after converting it to a region. Possible values are:

Value Meaning
TRUE Delete the annotation object after completing the process.
FALSE Do not delete the annotation object after completing the process.

L_UINT uFlags

Flags that determine whether to apply the feature on the one cell only, or more than one cell. This value can only be used when the cell is attached to the LImageViewer through the function LImageViewer::InsertCell. Possible values are:

Value Meaning
CELL_APPLYTOTHIS [0x00000000] Apply the feature to this cell only.
CELL_APPLYTOALL [0x10000000] Apply the feature to all the cells in the Image Viewer.
CELL_APPLYTOSELECTED [0x20000000] Apply the feature to the selected cells in the Image Viewer.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


The chosen sub-cell or cell must have a selected annotation in order to convert it into a region. If there is no selected annotation, the function will return ERROR_INV_PARAMETER.

This function works only on the closed shape annotation objects, such as rectangle, ellipse and Hilite.

If you have a cell with one image, you must set nSubCellIndex to zero.

Required DLLs and Libraries

See Also




This function inverts a region inside the bitmap, we assumed that we have one cell, and there is a selected rectangular or elliptical annotation on it.

L_INT LImageViewer_AnnToRgnExample(LImageViewerCell& ImageViewerCell)  
   BITMAPHANDLE            Bitmap;  
   L_INT                   nRet;  
   LBitmap tmpBitmap; 
   AnnAttrib.uStructSize = sizeof(DISPCONTAINERANNATTRIBS);  
   nRet = ImageViewerCell.GetSelectedAnnotationAttributes(0, &AnnAttrib, 0);  
      return FAILURE;  
   nRet = ImageViewerCell.AnnToRgn(-2, L_RGN_SET, TRUE, 0);  
   if (nRet != SUCCESS)  
      return nRet;  
   // Just apply the effect on the active sub-cell.  
   // this is done by setting the nSubCell parameter to -2.  
   nRet = ImageViewerCell.GetBitmapHandle(-2, &Bitmap, 0);  
   if (nRet != SUCCESS)  
      return nRet;  
   nRet = tmpBitmap.Invert(); 
   if (nRet != SUCCESS)  
      return nRet;  
   nRet = ImageViewerCell.SetBitmapHandle(-2, tmpBitmap.GetHandle(), FALSE, 0);  
   if (nRet != SUCCESS)  
      return nRet;  
   // Repaint the cell after the user is done with the changes.  
   //nRet = ImageViewerCell.RepaintCell(0, 0);  
   if (nRet != SUCCESS)  
      return nRet;  
   return SUCCESS;  

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LEADTOOLS Medical Image Viewer C++ Class Library Help